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CVE-2023-4806

Status Candidate

Overview

A flaw was found in glibc. In an extremely rare situation, the getaddrinfo function may access memory that has been freed, resulting in an application crash. This issue is only exploitable when a NSS module implements only the _nss_*_gethostbyname2_r and _nss_*_getcanonname_r hooks without implementing the _nss_*_gethostbyname3_r hook. The resolved name should return a large number of IPv6 and IPv4, and the call to the getaddrinfo function should have the AF_INET6 address family with AI_CANONNAME, AI_ALL and AI_V4MAPPED as flags.

Related Files

Ubuntu Security Notice USN-6541-1
Posted Dec 8, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6541-1 - It was discovered that the GNU C Library was not properly handling certain memory operations. An attacker could possibly use this issue to cause a denial of service. It was discovered that the GNU C library was not properly implementing a fix for CVE-2023-4806 in certain cases, which could lead to a memory leak. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 23.04.

tags | advisory, denial of service, memory leak
systems | linux, ubuntu
advisories | CVE-2023-4806, CVE-2023-4813, CVE-2023-5156
SHA-256 | b85f9f52093ce10aa6b4c70c75704a38cdff1338bd3d60b1e6b36ff30dbd6126
Red Hat Security Advisory 2023-7409-01
Posted Nov 22, 2023
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2023-7409-01 - An update for glibc is now available for Red Hat Enterprise Linux 8.6 Extended Update Support. Issues addressed include a use-after-free vulnerability.

tags | advisory
systems | linux, redhat
advisories | CVE-2023-4806
SHA-256 | 26a68b00649db8157bd9e273f7d130df056dcf426bef0f2df356e019d912d51c
Red Hat Security Advisory 2023-5455-01
Posted Oct 6, 2023
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2023-5455-01 - The glibc packages provide the standard C libraries, POSIX thread libraries, standard math libraries, and the name service cache daemon used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. Issues addressed include buffer overflow, privilege escalation, and use-after-free vulnerabilities.

tags | advisory, overflow, vulnerability
systems | linux, redhat, osx
advisories | CVE-2023-4527, CVE-2023-4806, CVE-2023-4813, CVE-2023-4911
SHA-256 | c539e392dc47fc652213fbb778378e740f14ab77e224cc908245d886a1ba267b
Red Hat Security Advisory 2023-5453-01
Posted Oct 6, 2023
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2023-5453-01 - The glibc packages provide the standard C libraries, POSIX thread libraries, standard math libraries, and the name service cache daemon used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. Issues addressed include buffer overflow, privilege escalation, and use-after-free vulnerabilities.

tags | advisory, overflow, vulnerability
systems | linux, redhat, osx
advisories | CVE-2023-4527, CVE-2023-4806, CVE-2023-4813, CVE-2023-4911
SHA-256 | c88515dc1b69c0282a2afe7e6d0ea45ea6534432b06726593717f6d8662d76b1
Gentoo Linux Security Advisory 202310-03
Posted Oct 4, 2023
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202310-3 - Multiple vulnerabilities in glibc could result in Local Privilege Escalation. Versions greater than or equal to 2.37-r7 are affected.

tags | advisory, local, vulnerability
systems | linux, gentoo
advisories | CVE-2022-39046, CVE-2023-4527, CVE-2023-4806, CVE-2023-4911
SHA-256 | e2500310834567c2cb1e8cade2790f16602f9ae46924039eae6d388ddac98d3b
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