Use After Free Affecting glibc-minimal-langpack package, versions <2:2.28-225.0.4.ksplice1.el8_8.6



    Attack Complexity High
    Availability High

    Threat Intelligence

    EPSS 0.1% (40th percentile)
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5.9 medium
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Red Hat
5.9 medium

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  • published 11 Oct 2023
  • disclosed 18 Sep 2023

How to fix?

Upgrade Oracle:8 glibc-minimal-langpack to version 2:2.28-225.0.4.ksplice1.el8_8.6 or higher.
This issue was patched in ELSA-2023-12872.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc-minimal-langpack package and not the glibc-minimal-langpack package as distributed by Oracle. See How to fix? for Oracle: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.