CVE-2023-4813

Description

A flaw has been identified 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.

Read the notes from the security team

Why is this CVE low priority?

Uncommong situation

Learn more about Ubuntu priority

Status

Show unmaintained releases

Package	Ubuntu Release	Status
glibc	25.10 questing	Not affected
	25.04 plucky	Not affected
	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.04 LTS jammy	Fixed 2.35-0ubuntu3.5
	20.04 LTS focal	Fixed 2.31-0ubuntu9.14
	18.04 LTS bionic	Fixed 2.27-3ubuntu1.6+esm1
	16.04 LTS xenial	Fixed 2.23-0ubuntu11.3+esm5
	14.04 LTS trusty	Ignored end of standard support
eglibc	25.10 questing	Not in release
	25.04 plucky	Not in release
	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Needs evaluation

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Notes

mdeslaur

requires a non-default configuration in /etc/nsswitch.conf

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
glibc	Upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=1c37b8022e8763fedbb3f79c02e05c6acfe5a215 Upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=6e867146ee01de3ed1e94e777372093812a578e9 Upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=228cdb00a045ae3b68a91b35c7548bab6029446e

Severity score breakdown

Parameter	Value
Base score	5.9 · Medium
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

References

Related Ubuntu Security Notices (USN)

USN-6541-1
GNU C Library vulnerabilities
7 December 2023

Cvss 3 Severity Score