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Advisory severityMedium5.3Red Hat Linux

Medium [CVE-2024-12133] inefficient der decoding in libtasn1 leading to potential remote dos

This medium-severity Red Hat Linux advisory covers CVE-2024-12133 affecting Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support.

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

CVE-2024-12133 Source published Source updated

VulniPulse record published

CVE-2024-12133
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

Summary

A flaw in libtasn1 causes inefficient handling of specific certificate data. When processing a large number of elements in a certificate, libtasn1 takes much longer than expected, which can slow down or even crash the system.

This flaw allows an attacker to send a specially crafted certificate, causing a denial of service attack. 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 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions; 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.

Is CVE-2024-12133 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2024-12133 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-2024-12133?

Upgrade to a fixed release named by Red Hat:

  • libtasn1-0:4.13-5.el8_10
  • gnutls-0:3.6.14-10.el8_4.1
  • libtasn1-0:4.13-3.el8_4.1
  • gnutls-0:3.6.16-5.el8_6.5
  • libtasn1-0:4.13-3.el8_6.2
  • gnutls-0:3.6.16-7.el8_8.4
  • libtasn1-0:4.13-4.el8_8.1
  • libtasn1-0:4.16.0-9.el9
  • libtasn1-0:4.16.0-8.el9_2.1
  • libtasn1-0:4.16.0-8.el9_4.1
  • discovery/discovery-server-rhel9:1.14.3-1748529279
  • discovery/discovery-ui-rhel9:1.14.2-1748467619

8 more fixed releases are listed below.

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
  • libtasn1-0:4.13-5.el8_10
  • gnutls-0:3.6.14-10.el8_4.1
  • libtasn1-0:4.13-3.el8_4.1
  • gnutls-0:3.6.16-5.el8_6.5
  • libtasn1-0:4.13-3.el8_6.2
  • gnutls-0:3.6.16-7.el8_8.4
  • libtasn1-0:4.13-4.el8_8.1
  • libtasn1-0:4.16.0-9.el9
  • libtasn1-0:4.16.0-8.el9_2.1
  • libtasn1-0:4.16.0-8.el9_4.1
  • discovery/discovery-server-rhel9:1.14.3-1748529279
  • discovery/discovery-ui-rhel9:1.14.2-1748467619
  • RHSA-2025:4049
  • RHSA-2026:33125
  • RHSA-2026:30849
  • RHSA-2026:30850
  • RHSA-2025:7077
  • RHSA-2025:17347
  • RHSA-2025:8021
  • RHSA-2025:8385

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

Mitigation

Upgrade to a fixed release: libtasn1-0:4.13-5.el8_10, gnutls-0:3.6.14-10.el8_4.1, libtasn1-0:4.13-3.el8_4.1, gnutls-0:3.6.16-5.el8_6.5, libtasn1-0:4.13-3.el8_6.2, gnutls-0:3.6.16-7.el8_8.4. 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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