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HIGH

CVE-2024-0553

CVSS v3

7.5

HIGH

EPSS Score

1.6 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • gnutlsAlmaLinux:9all versions · fixed in 3.7.6-23.el9_3.3and 4 other packages
  • gnutlsAlmaLinux:8all versions · fixed in 3.6.16-8.el8_9.1and 4 other packages

Vendor advisories

  • CVE-2024-0553 Red Hat Product Security523 products fixed · 11 known affected

    gnutls: incomplete fix for CVE-2023-5981

    gnutls as a component of Red Hat Enterprise Linux 6 · gnutls-devel as a component of Red Hat Enterprise Linux 6 · gnutls-guile as a component of Red Hat Enterprise Linux 6

  • RHSA-2024:2094 Red Hat Product Security59 products fixed

    Red Hat Security Advisory: security update Logging for Red Hat OpenShift - 5.8.6

  • RHSA-2024:1383 Red Hat Product Security89 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.15.0 security, enhancement, & bug fix update

  • RHSA-2024:1108 Red Hat Product Security75 products fixed

    Red Hat Security Advisory: gnutls security update

  • RHSA-2024:1082 Red Hat Product Security75 products fixed

    Red Hat Security Advisory: gnutls security update

  • RHSA-2024:0796 Red Hat Product Security75 products fixed

    Red Hat Security Advisory: gnutls security update

4 more advisories

Full record on NVD

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.

Technical details

Published
2024-01-16

Frequently asked questions

What is CVE-2024-0553?

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.

Is CVE-2024-0553 actively exploited?

Active exploitation of CVE-2024-0553 has not been confirmed. Its EPSS score was 1.6% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-0553?

CVE-2024-0553 has a CVSS v3 base score of 7.5 (HIGH severity).

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