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{"acknowledgement": "This issue was discovered by Florian Weimer (Red Hat).", "affected_release": [{"advisory": "RHSA-2023:5455", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "glibc-0:2.28-225.el8_8.6", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-10-05T00:00:00Z"}, {"advisory": "RHSA-2023:5455", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "glibc-0:2.28-225.el8_8.6", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-10-05T00:00:00Z"}, {"advisory": "RHSA-2023:5453", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "glibc-0:2.34-60.el9_2.7", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-10-05T00:00:00Z"}, {"advisory": "RHSA-2023:5453", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "glibc-0:2.34-60.el9_2.7", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-10-05T00:00:00Z"}], "bugzilla": {"description": "glibc: Stack read overflow in getaddrinfo in no-aaaa mode", "id": "2234712", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2234712"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H", "status": "verified"}, "cwe": "CWE-121", "details": ["A flaw was found in glibc. When the getaddrinfo function is called with the AF_UNSPEC address family and the system is configured with no-aaaa mode via /etc/resolv.conf, a DNS response via TCP larger than 2048 bytes can potentially disclose stack contents through the function returned address data, and may cause a crash.", "A flaw was found in glibc. When the getaddrinfo function is called with the AF_UNSPEC address family and the system is configured with no-aaaa mode via /etc/resolv.conf, a DNS response via TCP larger than 2048 bytes can potentially disclose stack contents through the function returned address data, and may cause a crash."], "mitigation": {"lang": "en:us", "value": "Removing the no-aaaa diagnostic option from /etc/resolv.conf will mitigate this flaw."}, "name": "CVE-2023-4527", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "compat-glibc", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "glibc", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "compat-glibc", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "glibc", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2023-09-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-4527\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-4527"], "statement": "This issue only affects systems configured with no-aaaa mode via /etc/resolv.conf.\nThe no-aaaa stub resolver option was backported only to Red Hat Enterprise Linux versions 8.7 and 9.1. Therefore, previous versions are not affected.", "threat_severity": "Moderate"}