CVE-2023-4806

Updated: 2024-01-25 19:47:55.171759

Description:

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.


Links NIST CIRCL RHEL Ubuntu

Severity

Severity Score
CVSS Version 2.x 0
CVSS Version 3.x MEDIUM 5.9

Status

OS name Project name Version Score Severity Status Errata Last updated
AlmaLinux 9.2 ESU glibc 2.34 5.9 MEDIUM Ignored 2023-12-01 03:18:55
CentOS 7 ELS glibc 2.17 5.9 MEDIUM Ignored 2023-12-01 03:18:55
CentOS 8.4 ELS glibc 2.28 5.9 MEDIUM Ignored 2023-12-01 03:18:55
CentOS 8.5 ELS glibc 2.28 5.9 MEDIUM Ignored 2023-12-01 03:18:55
Ubuntu 16.04 ELS glibc 2.23-0 5.9 MEDIUM In Testing CLSA-2024:1709562366 2024-01-17 04:09:19
Ubuntu 18.04 ELS glibc 2.27-3 5.9 MEDIUM Released CLSA-2024:1708638685 2024-02-22 20:54:32