CVE-2024-12243

Publication date 10 February 2025

Last updated 19 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A flaw was found in GnuTLS, which relies on libtasn1 for ASN.1 data processing. Due to an inefficient algorithm in libtasn1, decoding certain DER-encoded certificate data can take excessive time, leading to increased resource consumption. This flaw allows a remote attacker to send a specially crafted certificate, causing GnuTLS to become unresponsive or slow, resulting in a denial-of-service condition.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
gnutls28	25.10 questing	Fixed 3.8.9-2ubuntu1
	25.04 plucky	Fixed 3.8.9-2ubuntu1
	24.10 oracular	Fixed 3.8.6-2ubuntu1.1
	24.04 LTS noble	Fixed 3.8.3-1.1ubuntu3.3
	22.04 LTS jammy	Fixed 3.7.3-4ubuntu1.6
	20.04 LTS focal	Fixed 3.6.13-2ubuntu1.12
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Needs evaluation

Patch details

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

Package	Patch details
gnutls28	Upstream: 4760bc6

Severity score breakdown

Parameter	Value
Base score	5.3 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	Low
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

Related Ubuntu Security Notices (USN)

USN-7281-1
GnuTLS vulnerability
20 February 2025