CVE-2024-0553

Publication date 16 January 2024

Last updated 19 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A vulnerability was found in GnuTLS. The response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from the response times of ciphertexts with correct PKCS#1 v1.5 padding. This issue may allow a remote attacker to perform a timing side-channel attack in the RSA-PSK key exchange, potentially leading to the leakage of sensitive data. CVE-2024-0553 is designated as an incomplete resolution for CVE-2023-5981.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
gnutls28	25.10 questing	Fixed 3.8.3-1ubuntu1
	25.04 plucky	Fixed 3.8.3-1ubuntu1
	24.10 oracular	Fixed 3.8.3-1ubuntu1
	24.04 LTS noble	Fixed 3.8.3-1ubuntu1
	23.10 mantic	Fixed 3.8.1-4ubuntu1.2
	23.04 lunar	Fixed 3.7.8-5ubuntu1.2
	22.04 LTS jammy	Fixed 3.7.3-4ubuntu1.4
	20.04 LTS focal	Fixed 3.6.13-2ubuntu1.10
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Ignored see notes
	14.04 LTS trusty	Ignored end of standard support

Notes

iconstantin

CVE-2023-5981 ignored/fix not applied in xenial.

Patch details

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

Package	Patch details
gnutls28	Upstream: 40dbbd8

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

USN-6593-1
GnuTLS vulnerabilities
22 January 2024