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Advisory severityMedium5.3Red Hat Linux

Medium [CVE-2024-12243] gnutls impacted by inefficient der decoding in libtasn1 leading to remote dos

This medium-severity Red Hat Linux advisory covers CVE-2024-12243 affecting Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.4 Extended Update Support.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2024-12243 Source published Source updated

VulniPulse record published

CVE-2024-12243
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

Summary

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. Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Weakness: CWE-407. Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.4 Extended Update Support; Red Hat Discovery 1.14; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat OpenShift Container Platform 4.

Red Hat lists Red Hat Enterprise Linux 10 as not affected. Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7.

Red Hat fixing advisory: RHSA-2025:4051, RHSA-2025:7076, RHSA-2025:17361, RHSA-2025:8020, RHSA-2025:8385.

Affected products named by the advisory: Red Hat package: gnutls.

Is CVE-2024-12243 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2024-12243 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2024-12243?

Upgrade to a fixed release named by Red Hat:

  • gnutls-0:3.6.16-8.el8_10.3
  • gnutls-0:3.8.3-6.el9
  • gnutls-0:3.7.6-21.el9_2.4
  • gnutls-0:3.8.3-4.el9_4.2
  • discovery/discovery-server-rhel9:1.14.3-1748529279
  • discovery/discovery-ui-rhel9:1.14.2-1748467619
  • RHSA-2025:4051
  • RHSA-2025:7076
  • RHSA-2025:17361
  • RHSA-2025:8020
  • RHSA-2025:8385

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 18 days ago·verify at source

Fixed versions
  • gnutls-0:3.6.16-8.el8_10.3
  • gnutls-0:3.8.3-6.el9
  • gnutls-0:3.7.6-21.el9_2.4
  • gnutls-0:3.8.3-4.el9_4.2
  • discovery/discovery-server-rhel9:1.14.3-1748529279
  • discovery/discovery-ui-rhel9:1.14.2-1748467619
  • RHSA-2025:4051
  • RHSA-2025:7076
  • RHSA-2025:17361
  • RHSA-2025:8020
  • RHSA-2025:8385

Official advisory · high-confidence parse· fetched 18 days ago·verify at source

Mitigation

Upgrade to a fixed release: gnutls-0:3.6.16-8.el8_10.3, gnutls-0:3.8.3-6.el9, gnutls-0:3.7.6-21.el9_2.4, gnutls-0:3.8.3-4.el9_4.2, discovery/discovery-server-rhel9:1.14.3-1748529279, discovery/discovery-ui-rhel9:1.14.2-1748467619. That is the remediation for this advisory.

The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.

Official advisory · high-confidence parse· fetched 18 days ago·verify at source

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