{"dataType": "CVE_RECORD", "cveMetadata": {"cveId": "CVE-2024-36933", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-30T15:25:07.071Z", "datePublished": "2024-05-30T15:29:23.764Z", "dateUpdated": "2025-05-04T09:12:21.934Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T09:12:21.934Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment().\n\nsyzbot triggered various splats (see [0] and links) by a crafted GSO\npacket of VIRTIO_NET_HDR_GSO_UDP layering the following protocols:\n\n ETH_P_8021AD + ETH_P_NSH + ETH_P_IPV6 + IPPROTO_UDP\n\nNSH can encapsulate IPv4, IPv6, Ethernet, NSH, and MPLS. As the inner\nprotocol can be Ethernet, NSH GSO handler, nsh_gso_segment(), calls\nskb_mac_gso_segment() to invoke inner protocol GSO handlers.\n\nnsh_gso_segment() does the following for the original skb before\ncalling skb_mac_gso_segment()\n\n 1. reset skb->network_header\n 2. save the original skb->{mac_heaeder,mac_len} in a local variable\n 3. pull the NSH header\n 4. resets skb->mac_header\n 5. set up skb->mac_len and skb->protocol for the inner protocol.\n\nand does the following for the segmented skb\n\n 6. set ntohs(ETH_P_NSH) to skb->protocol\n 7. push the NSH header\n 8. restore skb->mac_header\n 9. set skb->mac_header + mac_len to skb->network_header\n 10. restore skb->mac_len\n\nThere are two problems in 6-7 and 8-9.\n\n (a)\n After 6 & 7, skb->data points to the NSH header, so the outer header\n (ETH_P_8021AD in this case) is stripped when skb is sent out of netdev.\n\n Also, if NSH is encapsulated by NSH + Ethernet (so NSH-Ethernet-NSH),\n skb_pull() in the first nsh_gso_segment() will make skb->data point\n to the middle of the outer NSH or Ethernet header because the Ethernet\n header is not pulled by the second nsh_gso_segment().\n\n (b)\n While restoring skb->{mac_header,network_header} in 8 & 9,\n nsh_gso_segment() does not assume that the data in the linear\n buffer is shifted.\n\n However, udp6_ufo_fragment() could shift the data and change\n skb->mac_header accordingly as demonstrated by syzbot.\n\n If this happens, even the restored skb->mac_header points to\n the middle of the outer header.\n\nIt seems nsh_gso_segment() has never worked with outer headers so far.\n\nAt the end of nsh_gso_segment(), the outer header must be restored for\nthe segmented skb, instead of the NSH header.\n\nTo do that, let's calculate the outer header position relatively from\nthe inner header and set skb->{data,mac_header,protocol} properly.\n\n[0]:\nBUG: KMSAN: uninit-value in ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:524 [inline]\nBUG: KMSAN: uninit-value in ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline]\nBUG: KMSAN: uninit-value in ipvlan_queue_xmit+0xf44/0x16b0 drivers/net/ipvlan/ipvlan_core.c:668\n ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:524 [inline]\n ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline]\n ipvlan_queue_xmit+0xf44/0x16b0 drivers/net/ipvlan/ipvlan_core.c:668\n ipvlan_start_xmit+0x5c/0x1a0 drivers/net/ipvlan/ipvlan_main.c:222\n __netdev_start_xmit include/linux/netdevice.h:4989 [inline]\n netdev_start_xmit include/linux/netdevice.h:5003 [inline]\n xmit_one net/core/dev.c:3547 [inline]\n dev_hard_start_xmit+0x244/0xa10 net/core/dev.c:3563\n __dev_queue_xmit+0x33ed/0x51c0 net/core/dev.c:4351\n dev_queue_xmit include/linux/netdevice.h:3171 [inline]\n packet_xmit+0x9c/0x6b0 net/packet/af_packet.c:276\n packet_snd net/packet/af_packet.c:3081 [inline]\n packet_sendmsg+0x8aef/0x9f10 net/packet/af_packet.c:3113\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg net/socket.c:745 [inline]\n __sys_sendto+0x735/0xa10 net/socket.c:2191\n __do_sys_sendto net/socket.c:2203 [inline]\n __se_sys_sendto net/socket.c:2199 [inline]\n __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nUninit was created at:\n slab_post_alloc_hook mm/slub.c:3819 [inline]\n slab_alloc_node mm/slub.c:3860 [inline]\n __do_kmalloc_node mm/slub.c:3980 [inline]\n __kmalloc_node_track_caller+0x705/0x1000 mm/slub.c:4001\n kmalloc_reserve+0x249/0x4a0 net/core/skbuff.c:582\n __\n---truncated---"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/nsh/nsh.c"], "versions": [{"version": "c411ed854584a71b0e86ac3019b60e4789d88086", "lessThan": "a7c2c3c1caabcb4a3d6c47284c397507aaf54fe9", "status": "affected", "versionType": "git"}, {"version": "c411ed854584a71b0e86ac3019b60e4789d88086", "lessThan": "46134031c20fd313d03b90169d64b2e05ca6b65c", "status": "affected", "versionType": "git"}, {"version": "c411ed854584a71b0e86ac3019b60e4789d88086", "lessThan": "bbccf0caef2fa917d6d0692385a06ce3c262a216", "status": "affected", "versionType": "git"}, {"version": "c411ed854584a71b0e86ac3019b60e4789d88086", "lessThan": "5a4603fbc285752d19e4b415466db18ef3617e4a", "status": "affected", "versionType": "git"}, {"version": "c411ed854584a71b0e86ac3019b60e4789d88086", "lessThan": "37ed6f244ec5bda2e90b085084e322ea55d0aaa2", "status": "affected", "versionType": "git"}, {"version": "c411ed854584a71b0e86ac3019b60e4789d88086", "lessThan": "696d18bb59727a2e0526c0802a812620be1c9340", "status": "affected", "versionType": "git"}, {"version": "c411ed854584a71b0e86ac3019b60e4789d88086", "lessThan": "29a07f2ee4d273760c2acbfc756e29eccd82470a", "status": "affected", "versionType": "git"}, {"version": "c411ed854584a71b0e86ac3019b60e4789d88086", "lessThan": "4b911a9690d72641879ea6d13cce1de31d346d79", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/nsh/nsh.c"], "versions": [{"version": "4.14", "status": "affected"}, {"version": "0", "lessThan": "4.14", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.314", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.276", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.217", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.159", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.91", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.31", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.8.10", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.9", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "4.19.314"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.4.276"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.10.217"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.15.159"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.1.91"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.6.31"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.8.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.9"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a7c2c3c1caabcb4a3d6c47284c397507aaf54fe9"}, {"url": "https://git.kernel.org/stable/c/46134031c20fd313d03b90169d64b2e05ca6b65c"}, {"url": "https://git.kernel.org/stable/c/bbccf0caef2fa917d6d0692385a06ce3c262a216"}, {"url": "https://git.kernel.org/stable/c/5a4603fbc285752d19e4b415466db18ef3617e4a"}, {"url": "https://git.kernel.org/stable/c/37ed6f244ec5bda2e90b085084e322ea55d0aaa2"}, {"url": "https://git.kernel.org/stable/c/696d18bb59727a2e0526c0802a812620be1c9340"}, {"url": "https://git.kernel.org/stable/c/29a07f2ee4d273760c2acbfc756e29eccd82470a"}, {"url": "https://git.kernel.org/stable/c/4b911a9690d72641879ea6d13cce1de31d346d79"}], "title": "nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment().", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-36933", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-06-04T15:40:25.095830Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:47:53.616Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/a7c2c3c1caabcb4a3d6c47284c397507aaf54fe9", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/46134031c20fd313d03b90169d64b2e05ca6b65c", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/bbccf0caef2fa917d6d0692385a06ce3c262a216", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/5a4603fbc285752d19e4b415466db18ef3617e4a", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/37ed6f244ec5bda2e90b085084e322ea55d0aaa2", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/696d18bb59727a2e0526c0802a812620be1c9340", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/29a07f2ee4d273760c2acbfc756e29eccd82470a", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/4b911a9690d72641879ea6d13cce1de31d346d79", "tags": ["x_transferred"]}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html", "tags": ["x_transferred"]}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00019.html", "tags": ["x_transferred"]}, {"url": "https://security.netapp.com/advisory/ntap-20240912-0006/"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-09-12T16:02:59.824Z"}}]}, "dataVersion": "5.1"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/a7c2c3c1caabcb4a3d6c47284c397507aaf54fe9", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/46134031c20fd313d03b90169d64b2e05ca6b65c", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/bbccf0caef2fa917d6d0692385a06ce3c262a216", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/5a4603fbc285752d19e4b415466db18ef3617e4a", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/37ed6f244ec5bda2e90b085084e322ea55d0aaa2", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/696d18bb59727a2e0526c0802a812620be1c9340", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/29a07f2ee4d273760c2acbfc756e29eccd82470a", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/4b911a9690d72641879ea6d13cce1de31d346d79", "tags": ["x_transferred"]}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html", "tags": ["x_transferred"]}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00019.html", "tags": ["x_transferred"]}, {"url": "https://security.netapp.com/advisory/ntap-20240912-0006/"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-09-12T16:02:59.824Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-36933", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-06-04T15:40:25.095830Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T15:40:29.025Z"}}], "cna": {"title": "nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment().", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "c411ed854584", "lessThan": "a7c2c3c1caab", "versionType": "git"}, {"status": "affected", "version": "c411ed854584", "lessThan": "46134031c20f", "versionType": "git"}, {"status": "affected", "version": "c411ed854584", "lessThan": "bbccf0caef2f", "versionType": "git"}, {"status": "affected", "version": "c411ed854584", "lessThan": "5a4603fbc285", "versionType": "git"}, {"status": "affected", "version": "c411ed854584", "lessThan": "37ed6f244ec5", "versionType": "git"}, {"status": "affected", "version": "c411ed854584", "lessThan": "696d18bb5972", "versionType": "git"}, {"status": "affected", "version": "c411ed854584", "lessThan": "29a07f2ee4d2", "versionType": "git"}, {"status": "affected", "version": "c411ed854584", "lessThan": "4b911a9690d7", "versionType": "git"}], "programFiles": ["net/nsh/nsh.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.14"}, {"status": "unaffected", "version": "0", "lessThan": "4.14", "versionType": "semver"}, {"status": "unaffected", "version": "4.19.314", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.276", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.217", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.159", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.91", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.31", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.8.10", "versionType": "semver", "lessThanOrEqual": "6.8.*"}, {"status": "unaffected", "version": "6.9", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/nsh/nsh.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/a7c2c3c1caabcb4a3d6c47284c397507aaf54fe9"}, {"url": "https://git.kernel.org/stable/c/46134031c20fd313d03b90169d64b2e05ca6b65c"}, {"url": "https://git.kernel.org/stable/c/bbccf0caef2fa917d6d0692385a06ce3c262a216"}, {"url": "https://git.kernel.org/stable/c/5a4603fbc285752d19e4b415466db18ef3617e4a"}, {"url": "https://git.kernel.org/stable/c/37ed6f244ec5bda2e90b085084e322ea55d0aaa2"}, {"url": "https://git.kernel.org/stable/c/696d18bb59727a2e0526c0802a812620be1c9340"}, {"url": "https://git.kernel.org/stable/c/29a07f2ee4d273760c2acbfc756e29eccd82470a"}, {"url": "https://git.kernel.org/stable/c/4b911a9690d72641879ea6d13cce1de31d346d79"}], "x_generator": {"engine": "bippy-9e1c9544281a"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment().\n\nsyzbot triggered various splats (see [0] and links) by a crafted GSO\npacket of VIRTIO_NET_HDR_GSO_UDP layering the following protocols:\n\n ETH_P_8021AD + ETH_P_NSH + ETH_P_IPV6 + IPPROTO_UDP\n\nNSH can encapsulate IPv4, IPv6, Ethernet, NSH, and MPLS. As the inner\nprotocol can be Ethernet, NSH GSO handler, nsh_gso_segment(), calls\nskb_mac_gso_segment() to invoke inner protocol GSO handlers.\n\nnsh_gso_segment() does the following for the original skb before\ncalling skb_mac_gso_segment()\n\n 1. reset skb->network_header\n 2. save the original skb->{mac_heaeder,mac_len} in a local variable\n 3. pull the NSH header\n 4. resets skb->mac_header\n 5. set up skb->mac_len and skb->protocol for the inner protocol.\n\nand does the following for the segmented skb\n\n 6. set ntohs(ETH_P_NSH) to skb->protocol\n 7. push the NSH header\n 8. restore skb->mac_header\n 9. set skb->mac_header + mac_len to skb->network_header\n 10. restore skb->mac_len\n\nThere are two problems in 6-7 and 8-9.\n\n (a)\n After 6 & 7, skb->data points to the NSH header, so the outer header\n (ETH_P_8021AD in this case) is stripped when skb is sent out of netdev.\n\n Also, if NSH is encapsulated by NSH + Ethernet (so NSH-Ethernet-NSH),\n skb_pull() in the first nsh_gso_segment() will make skb->data point\n to the middle of the outer NSH or Ethernet header because the Ethernet\n header is not pulled by the second nsh_gso_segment().\n\n (b)\n While restoring skb->{mac_header,network_header} in 8 & 9,\n nsh_gso_segment() does not assume that the data in the linear\n buffer is shifted.\n\n However, udp6_ufo_fragment() could shift the data and change\n skb->mac_header accordingly as demonstrated by syzbot.\n\n If this happens, even the restored skb->mac_header points to\n the middle of the outer header.\n\nIt seems nsh_gso_segment() has never worked with outer headers so far.\n\nAt the end of nsh_gso_segment(), the outer header must be restored for\nthe segmented skb, instead of the NSH header.\n\nTo do that, let's calculate the outer header position relatively from\nthe inner header and set skb->{data,mac_header,protocol} properly.\n\n[0]:\nBUG: KMSAN: uninit-value in ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:524 [inline]\nBUG: KMSAN: uninit-value in ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline]\nBUG: KMSAN: uninit-value in ipvlan_queue_xmit+0xf44/0x16b0 drivers/net/ipvlan/ipvlan_core.c:668\n ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:524 [inline]\n ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline]\n ipvlan_queue_xmit+0xf44/0x16b0 drivers/net/ipvlan/ipvlan_core.c:668\n ipvlan_start_xmit+0x5c/0x1a0 drivers/net/ipvlan/ipvlan_main.c:222\n __netdev_start_xmit include/linux/netdevice.h:4989 [inline]\n netdev_start_xmit include/linux/netdevice.h:5003 [inline]\n xmit_one net/core/dev.c:3547 [inline]\n dev_hard_start_xmit+0x244/0xa10 net/core/dev.c:3563\n __dev_queue_xmit+0x33ed/0x51c0 net/core/dev.c:4351\n dev_queue_xmit include/linux/netdevice.h:3171 [inline]\n packet_xmit+0x9c/0x6b0 net/packet/af_packet.c:276\n packet_snd net/packet/af_packet.c:3081 [inline]\n packet_sendmsg+0x8aef/0x9f10 net/packet/af_packet.c:3113\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg net/socket.c:745 [inline]\n __sys_sendto+0x735/0xa10 net/socket.c:2191\n __do_sys_sendto net/socket.c:2203 [inline]\n __se_sys_sendto net/socket.c:2199 [inline]\n __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nUninit was created at:\n slab_post_alloc_hook mm/slub.c:3819 [inline]\n slab_alloc_node mm/slub.c:3860 [inline]\n __do_kmalloc_node mm/slub.c:3980 [inline]\n __kmalloc_node_track_caller+0x705/0x1000 mm/slub.c:4001\n kmalloc_reserve+0x249/0x4a0 net/core/skbuff.c:582\n __\n---truncated---"}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-05T09:28:20.690Z"}}}, "cveMetadata": {"cveId": "CVE-2024-36933", "state": "PUBLISHED", "dateUpdated": "2024-11-05T09:28:20.690Z", "dateReserved": "2024-05-30T15:25:07.071Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-30T15:29:23.764Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment().\n\nsyzbot triggered various splats (see [0] and links) by a crafted GSO\npacket of VIRTIO_NET_HDR_GSO_UDP layering the following protocols:\n\n ETH_P_8021AD + ETH_P_NSH + ETH_P_IPV6 + IPPROTO_UDP\n\nNSH can encapsulate IPv4, IPv6, Ethernet, NSH, and MPLS. As the inner\nprotocol can be Ethernet, NSH GSO handler, nsh_gso_segment(), calls\nskb_mac_gso_segment() to invoke inner protocol GSO handlers.\n\nnsh_gso_segment() does the following for the original skb before\ncalling skb_mac_gso_segment()\n\n 1. reset skb->network_header\n 2. save the original skb->{mac_heaeder,mac_len} in a local variable\n 3. pull the NSH header\n 4. resets skb->mac_header\n 5. set up skb->mac_len and skb->protocol for the inner protocol.\n\nand does the following for the segmented skb\n\n 6. set ntohs(ETH_P_NSH) to skb->protocol\n 7. push the NSH header\n 8. restore skb->mac_header\n 9. set skb->mac_header + mac_len to skb->network_header\n 10. restore skb->mac_len\n\nThere are two problems in 6-7 and 8-9.\n\n (a)\n After 6 & 7, skb->data points to the NSH header, so the outer header\n (ETH_P_8021AD in this case) is stripped when skb is sent out of netdev.\n\n Also, if NSH is encapsulated by NSH + Ethernet (so NSH-Ethernet-NSH),\n skb_pull() in the first nsh_gso_segment() will make skb->data point\n to the middle of the outer NSH or Ethernet header because the Ethernet\n header is not pulled by the second nsh_gso_segment().\n\n (b)\n While restoring skb->{mac_header,network_header} in 8 & 9,\n nsh_gso_segment() does not assume that the data in the linear\n buffer is shifted.\n\n However, udp6_ufo_fragment() could shift the data and change\n skb->mac_header accordingly as demonstrated by syzbot.\n\n If this happens, even the restored skb->mac_header points to\n the middle of the outer header.\n\nIt seems nsh_gso_segment() has never worked with outer headers so far.\n\nAt the end of nsh_gso_segment(), the outer header must be restored for\nthe segmented skb, instead of the NSH header.\n\nTo do that, let's calculate the outer header position relatively from\nthe inner header and set skb->{data,mac_header,protocol} properly.\n\n[0]:\nBUG: KMSAN: uninit-value in ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:524 [inline]\nBUG: KMSAN: uninit-value in ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline]\nBUG: KMSAN: uninit-value in ipvlan_queue_xmit+0xf44/0x16b0 drivers/net/ipvlan/ipvlan_core.c:668\n ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:524 [inline]\n ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline]\n ipvlan_queue_xmit+0xf44/0x16b0 drivers/net/ipvlan/ipvlan_core.c:668\n ipvlan_start_xmit+0x5c/0x1a0 drivers/net/ipvlan/ipvlan_main.c:222\n __netdev_start_xmit include/linux/netdevice.h:4989 [inline]\n netdev_start_xmit include/linux/netdevice.h:5003 [inline]\n xmit_one net/core/dev.c:3547 [inline]\n dev_hard_start_xmit+0x244/0xa10 net/core/dev.c:3563\n __dev_queue_xmit+0x33ed/0x51c0 net/core/dev.c:4351\n dev_queue_xmit include/linux/netdevice.h:3171 [inline]\n packet_xmit+0x9c/0x6b0 net/packet/af_packet.c:276\n packet_snd net/packet/af_packet.c:3081 [inline]\n packet_sendmsg+0x8aef/0x9f10 net/packet/af_packet.c:3113\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg net/socket.c:745 [inline]\n __sys_sendto+0x735/0xa10 net/socket.c:2191\n __do_sys_sendto net/socket.c:2203 [inline]\n __se_sys_sendto net/socket.c:2199 [inline]\n __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nUninit was created at:\n slab_post_alloc_hook mm/slub.c:3819 [inline]\n slab_alloc_node mm/slub.c:3860 [inline]\n __do_kmalloc_node mm/slub.c:3980 [inline]\n __kmalloc_node_track_caller+0x705/0x1000 mm/slub.c:4001\n kmalloc_reserve+0x249/0x4a0 net/core/skbuff.c:582\n __\n---truncated---"}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: nsh: restaurar skb->{protocol,data,mac_header} para el encabezado externo en nsh_gso_segment(). syzbot activ\u00f3 varios s\u00edmbolos (ver [0] y enlaces) mediante un paquete GSO manipulado de VIRTIO_NET_HDR_GSO_UDP que superpone los siguientes protocolos: ETH_P_8021AD + ETH_P_NSH + ETH_P_IPV6 + IPPROTO_UDP NSH puede encapsular IPv4, IPv6, Ethernet, NSH y MPLS. Como el protocolo interno puede ser Ethernet, el controlador NSH GSO, nsh_gso_segment(), llama a skb_mac_gso_segment() para invocar los controladores GSO del protocolo interno. nsh_gso_segment() hace lo siguiente para el skb original antes de llamar a skb_mac_gso_segment() 1. restablecer skb->network_header 2. guardar el skb->{mac_heaeder,mac_len} original en una variable local 3. extraer el encabezado NSH 4. restablece skb- >mac_header 5. Configure skb->mac_len y skb->protocol para el protocolo interno. y hace lo siguiente para el skb segmentado 6. configurar ntohs(ETH_P_NSH) en skb->protocol 7. empujar el encabezado NSH 8. restaurar skb->mac_header 9. configurar skb->mac_header + mac_len en skb->network_header 10. restaurar skb->mac_len Hay dos problemas en 6-7 y 8-9. (a) Despu\u00e9s de 6 y 7, skb->data apunta al encabezado NSH, por lo que el encabezado externo (ETH_P_8021AD en este caso) se elimina cuando skb se env\u00eda fuera de netdev. Adem\u00e1s, si NSH est\u00e1 encapsulado por NSH + Ethernet (es decir, NSH-Ethernet-NSH), skb_pull() en el primer nsh_gso_segment() har\u00e1 que skb->data apunte al medio del encabezado NSH o Ethernet externo porque el encabezado Ethernet es no arrastrado por el segundo nsh_gso_segment(). (b) Al restaurar skb->{mac_header,network_header} en 8 y 9, nsh_gso_segment() no supone que los datos en el b\u00fafer lineal se hayan desplazado. Sin embargo, udp6_ufo_fragment() podr\u00eda cambiar los datos y cambiar skb->mac_header en consecuencia, como lo demuestra syzbot. Si esto sucede, incluso el skb->mac_header restaurado apunta al centro del encabezado externo. Parece que nsh_gso_segment() nunca ha funcionado con encabezados externos hasta ahora. Al final de nsh_gso_segment(), se debe restaurar el encabezado externo para el skb segmentado, en lugar del encabezado NSH. Para hacer eso, calculemos la posici\u00f3n del encabezado externo relativamente desde el encabezado interno y configuremos skb->{data,mac_header,protocol} correctamente. [0]: ERROR: KMSAN: valor uninit en ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:524 [en l\u00ednea] ERROR: KMSAN: valor uninit en ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [en l\u00ednea] ERROR: KMSAN: valor uninit en ipvlan_queue_xmit+0xf44/0x16b0 drivers/net/ipvlan/ipvlan_core.c:668 ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:524 [en l\u00ednea] ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c: 602 [en l\u00ednea] ipvlan_queue_xmit+0xf44/0x16b0 drivers/net/ipvlan/ipvlan_core.c:668 ipvlan_start_xmit+0x5c/0x1a0 drivers/net/ipvlan/ipvlan_main.c:222 __netdev_start_xmit include/linux/netdevice.h:4989 [en l\u00ednea] _xmitir include/linux/netdevice.h:5003 [en l\u00ednea] xmit_one net/core/dev.c:3547 [en l\u00ednea] dev_hard_start_xmit+0x244/0xa10 net/core/dev.c:3563 __dev_queue_xmit+0x33ed/0x51c0 net/core/dev. c:4351 dev_queue_xmit include/linux/netdevice.h:3171 [en l\u00ednea] paquete_xmit+0x9c/0x6b0 net/packet/af_packet.c:276 paquete_snd net/packet/af_packet.c:3081 [en l\u00ednea] paquete_sendmsg+0x8aef/0x9f10 net/ paquete/af_packet.c:3113 sock_sendmsg_nosec net/socket.c:730 [en l\u00ednea] __sock_sendmsg net/socket.c:745 [en l\u00ednea] __sys_sendto+0x735/0xa10 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [ en l\u00ednea] __se_sys_sendto net/socket.c:2199 [en l\u00ednea] __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xcf/0x1e0 arch/x86/entry /common.c:83 Entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit se cre\u00f3 en: slab_post_alloc_hook mm/slub.c:3819 [en l\u00ednea] slab_alloc_node mm/slub.c:3860 [en l\u00ednea] __do_kmalloc_node mm/slub.c:3980---truncado---"}], "id": "CVE-2024-36933", "lastModified": "2024-11-21T09:22:51.043", "metrics": {}, "published": "2024-05-30T16:15:16.463", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/29a07f2ee4d273760c2acbfc756e29eccd82470a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/37ed6f244ec5bda2e90b085084e322ea55d0aaa2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/46134031c20fd313d03b90169d64b2e05ca6b65c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4b911a9690d72641879ea6d13cce1de31d346d79"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5a4603fbc285752d19e4b415466db18ef3617e4a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/696d18bb59727a2e0526c0802a812620be1c9340"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a7c2c3c1caabcb4a3d6c47284c397507aaf54fe9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bbccf0caef2fa917d6d0692385a06ce3c262a216"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/29a07f2ee4d273760c2acbfc756e29eccd82470a"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/37ed6f244ec5bda2e90b085084e322ea55d0aaa2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/46134031c20fd313d03b90169d64b2e05ca6b65c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/4b911a9690d72641879ea6d13cce1de31d346d79"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/5a4603fbc285752d19e4b415466db18ef3617e4a"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/696d18bb59727a2e0526c0802a812620be1c9340"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/a7c2c3c1caabcb4a3d6c47284c397507aaf54fe9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/bbccf0caef2fa917d6d0692385a06ce3c262a216"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00019.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20240912-0006/"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"affected_release": [{"advisory": "RHSA-2024:5102", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.16.1.rt7.357.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-08-08T00:00:00Z"}, {"advisory": "RHSA-2024:5101", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.16.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-08-08T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2025:8796", "cpe": "cpe:/a:redhat:rhel_eus:9.4", "package": "kernel-0:5.14.0-427.72.1.el9_4", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-06-11T00:00:00Z"}], "bugzilla": {"description": "kernel: nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment().", "id": "2284488", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2284488"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H", "status": "verified"}, "cwe": "CWE-457", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment().\nsyzbot triggered various splats (see [0] and links) by a crafted GSO\npacket of VIRTIO_NET_HDR_GSO_UDP layering the following protocols:\nETH_P_8021AD + ETH_P_NSH + ETH_P_IPV6 + IPPROTO_UDP\nNSH can encapsulate IPv4, IPv6, Ethernet, NSH, and MPLS. As the inner\nprotocol can be Ethernet, NSH GSO handler, nsh_gso_segment(), calls\nskb_mac_gso_segment() to invoke inner protocol GSO handlers.\nnsh_gso_segment() does the following for the original skb before\ncalling skb_mac_gso_segment()\n1. reset skb->network_header\n2. save the original skb->{mac_heaeder,mac_len} in a local variable\n3. pull the NSH header\n4. resets skb->mac_header\n5. set up skb->mac_len and skb->protocol for the inner protocol.\nand does the following for the segmented skb\n6. set ntohs(ETH_P_NSH) to skb->protocol\n7. push the NSH header\n8. restore skb->mac_header\n9. set skb->mac_header + mac_len to skb->network_header\n10. restore skb->mac_len\nThere are two problems in 6-7 and 8-9.\n(a)\nAfter 6 & 7, skb->data points to the NSH header, so the outer header\n(ETH_P_8021AD in this case) is stripped when skb is sent out of netdev.\nAlso, if NSH is encapsulated by NSH + Ethernet (so NSH-Ethernet-NSH),\nskb_pull() in the first nsh_gso_segment() will make skb->data point\nto the middle of the outer NSH or Ethernet header because the Ethernet\nheader is not pulled by the second nsh_gso_segment().\n(b)\nWhile restoring skb->{mac_header,network_header} in 8 & 9,\nnsh_gso_segment() does not assume that the data in the linear\nbuffer is shifted.\nHowever, udp6_ufo_fragment() could shift the data and change\nskb->mac_header accordingly as demonstrated by syzbot.\nIf this happens, even the restored skb->mac_header points to\nthe middle of the outer header.\nIt seems nsh_gso_segment() has never worked with outer headers so far.\nAt the end of nsh_gso_segment(), the outer header must be restored for\nthe segmented skb, instead of the NSH header.\nTo do that, let's calculate the outer header position relatively from\nthe inner header and set skb->{data,mac_header,protocol} properly.\n[0]:\nBUG: KMSAN: uninit-value in ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:524 [inline]\nBUG: KMSAN: uninit-value in ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline]\nBUG: KMSAN: uninit-value in ipvlan_queue_xmit+0xf44/0x16b0 drivers/net/ipvlan/ipvlan_core.c:668\nipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:524 [inline]\nipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline]\nipvlan_queue_xmit+0xf44/0x16b0 drivers/net/ipvlan/ipvlan_core.c:668\nipvlan_start_xmit+0x5c/0x1a0 drivers/net/ipvlan/ipvlan_main.c:222\n__netdev_start_xmit include/linux/netdevice.h:4989 [inline]\nnetdev_start_xmit include/linux/netdevice.h:5003 [inline]\nxmit_one net/core/dev.c:3547 [inline]\ndev_hard_start_xmit+0x244/0xa10 net/core/dev.c:3563\n__dev_queue_xmit+0x33ed/0x51c0 net/core/dev.c:4351\ndev_queue_xmit include/linux/netdevice.h:3171 [inline]\npacket_xmit+0x9c/0x6b0 net/packet/af_packet.c:276\npacket_snd net/packet/af_packet.c:3081 [inline]\npacket_sendmsg+0x8aef/0x9f10 net/packet/af_packet.c:3113\nsock_sendmsg_nosec net/socket.c:730 [inline]\n__sock_sendmsg net/socket.c:745 [inline]\n__sys_sendto+0x735/0xa10 net/socket.c:2191\n__do_sys_sendto net/socket.c:2203 [inline]\n__se_sys_sendto net/socket.c:2199 [inline]\n__x64_sys_sendto+0x125/0x1c0 net/socket.c:2199\ndo_syscall_x64 arch/x86/entry/common.c:52 [inline]\ndo_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\nUninit was created at:\nslab_post_alloc_hook mm/slub.c:3819 [inline]\nslab_alloc_node mm/slub.c:3860 [inline]\n__do_kmalloc_node mm/slub.c:3980 [inline]\n__kmalloc_node_track_caller+0x705/0x1000 mm/slub.c:4001\nkmalloc_reserve+0x249/0x4a0 net/core/skbuff.c:582\n__\n---truncated---"], "name": "CVE-2024-36933", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-30T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-36933\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-36933\nhttps://lore.kernel.org/linux-cve-announce/2024053042-CVE-2024-36933-444e@gregkh/T"], "threat_severity": "Low"}