Use After Free Affecting glibc-langpack-cmn package, versions <0:2.28-189.8.el8_6


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.11% (46th percentile)

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  • Snyk IDSNYK-RHEL8-GLIBCLANGPACKCMN-6078943
  • published22 Nov 2023
  • disclosed12 Sept 2023

Introduced: 12 Sep 2023

CVE-2023-4806  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:8 glibc-langpack-cmn to version 0:2.28-189.8.el8_6 or higher.
This issue was patched in RHSA-2023:7409.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc-langpack-cmn package and not the glibc-langpack-cmn package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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.

CVSS Scores

version 3.1