CVE-2024-0553

HIGH
MEDIUM Priority: 0.12 BB Relevance: 75/100
Published: 2024-01-16 Modified: 2026-11-05 First seen: 2026-11-05 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: High
I: None
A: None

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.

Weakness Classification (1)

Affected Software (5)

VendorProductVersion
— — 3.8.0 < 3.8.3
fedoraproject fedora 39
gnu gnutls < 3.8.3
redhat enterprise_linux 8.0
redhat enterprise_linux 9.0

Bug Bounty Relevance

75 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploitation Probability

1.61%
Raw Score 0.016140
Percentile 76.4%
Date 2026-11-13

EPSS Trend

2026-11-13
0.01614
2026-11-12
0.01614
2026-11-10
0.01614
2026-11-09
0.01614
2026-11-08
0.01614
2026-11-07
0.01614
2026-11-06
0.01614
2026-11-05
0.01614
2026-11-04
0.01614

Intelligence Sources

mitre ref →
nvd ref →