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CVE-2023-4813

Published: 12 September 2023

A flaw was found in glibc. In an uncommon situation, the gaih_inet function may use memory that has been freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is called and the hosts database in /etc/nsswitch.conf is configured with SUCCESS=continue or SUCCESS=merge.

Notes

AuthorNote
Priority reason:
Uncommong situation
mdeslaur
requires a non-default configuration in /etc/nsswitch.conf

Priority

Low

Cvss 3 Severity Score

5.9

Score breakdown

Status

Package Release Status
glibc
Launchpad, Ubuntu, Debian
trusty Ignored
(end of standard support)
xenial
Released (2.23-0ubuntu11.3+esm5)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
bionic
Released (2.27-3ubuntu1.6+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
lunar Not vulnerable
(2.37-0ubuntu2)
upstream
Released (2.36-3)
mantic Not vulnerable

focal
Released (2.31-0ubuntu9.14)
jammy
Released (2.35-0ubuntu3.5)
Patches:
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=1c37b8022e8763fedbb3f79c02e05c6acfe5a215 (2.36)
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=6e867146ee01de3ed1e94e777372093812a578e9 (2.35)
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=228cdb00a045ae3b68a91b35c7548bab6029446e (2.34)
eglibc
Launchpad, Ubuntu, Debian
trusty Needs triage

xenial Does not exist

bionic Does not exist

focal Does not exist

jammy Does not exist

lunar Does not exist

upstream Needs triage

mantic Does not exist

Severity score breakdown

Parameter Value
Base score 5.9
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H