CVE-2024-0553

Gnutls: incomplete fix for cve-2023-5981

HIGH
7.5
CVSS Score
Published: January 16, 2024 at 11:40 AM UTC
Updated: October 15, 2026 at 01:17 AM UTC
3 products affected across 3 vendorsFedoraEnterprise LinuxGnutls

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Severity
HIGH7.5
Exploit prediction
EPSS 2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versionsv < 3.8.3
Affected range stops below 3.8.3, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 0:3.6.16-5.el8_6.3 (unaffected)
Vendor states this is fixed in 0:3.6.16-7.el8_8.2 (unaffected)
Vendor states this is fixed in 0:3.6.16-8.el8_9.1 (unaffected)
Vendor states this is fixed in 0:3.7.6-21.el9_2.2 (unaffected)
Vendor states this is fixed in 0:3.7.6-23.el9_3.3 (unaffected)
Vendor states this is fixed in 6 (unknown)
Vendor states this is fixed in 7 (unknown)

References (17)

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHredhat
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-203CWE-385

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