CVE-2024-12133

Libtasn1: inefficient der decoding in libtasn1 leading to potential remote dos

publishedCWE-407

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.

Technical severity5.3 mediumCVSS 3.1 · CNA: redhat

Published2025-02-10Source updated 2026-11-05

Collected2026-11-052 attributed sources

Fixes and workarounds

No remediation reported in collected sources.

Missing remediation information is not evidence that no patch exists.

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
`libtasn1` https://gitlab.com/gnutls/libtasn1/	≥ 0; < 4.20.0 (affected, semver) Other versions: unaffected	CNA: redhat
Red Hat Enterprise Linux 8 Red Hat `libtasn1` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.13-5.el8_10; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat `gnutls` https://access.redhat.com/downloads/content/package-browser/	≥ 0:3.6.14-10.el8_4.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat `libtasn1` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.13-3.el8_4.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Red Hat `gnutls` https://access.redhat.com/downloads/content/package-browser/	≥ 0:3.6.14-10.el8_4.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Red Hat `libtasn1` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.13-3.el8_4.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat `gnutls` https://access.redhat.com/downloads/content/package-browser/	≥ 0:3.6.16-5.el8_6.5; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat `libtasn1` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.13-3.el8_6.2; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Red Hat `gnutls` https://access.redhat.com/downloads/content/package-browser/	≥ 0:3.6.16-5.el8_6.5; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Red Hat `libtasn1` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.13-3.el8_6.2; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.8 Telecommunications Update Service Red Hat `gnutls` https://access.redhat.com/downloads/content/package-browser/	≥ 0:3.6.16-7.el8_8.4; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.8 Telecommunications Update Service Red Hat `libtasn1` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.13-4.el8_8.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat `gnutls` https://access.redhat.com/downloads/content/package-browser/	≥ 0:3.6.16-7.el8_8.4; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat `libtasn1` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.13-4.el8_8.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9 Red Hat `libtasn1` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.16.0-9.el9; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Red Hat `libtasn1` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.16.0-8.el9_2.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.4 Extended Update Support Red Hat `libtasn1` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.16.0-8.el9_4.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Discovery 1.14 Red Hat `discovery/discovery-server-rhel9` https://catalog.redhat.com/software/containers/	≥ 1.14.3-1748529279; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Discovery 1.14 Red Hat `discovery/discovery-ui-rhel9` https://catalog.redhat.com/software/containers/	≥ 1.14.2-1748467619; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 10 Red Hat `libtasn1` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat Enterprise Linux 6 Red Hat `libtasn1` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat Enterprise Linux 7 Red Hat `libtasn1` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openshift/ose-rhel-coreos-9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Siemens	≥ V3.1.5; < * (affected, custom) Other versions: unknown	ADP: siemens-SADP
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Siemens	≥ V3.1.5; < * (affected, custom) Other versions: unknown	ADP: siemens-SADP
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Siemens	≥ V3.1.5; < * (affected, custom) Other versions: unknown	ADP: siemens-SADP
RUGGEDCOM ROX MX5000 Siemens	≥ 0; < V2.17.0 (affected, custom) Other versions: unknown	ADP: siemens-SADP
RUGGEDCOM ROX MX5000RE Siemens	≥ 0; < V2.17.0 (affected, custom) Other versions: unknown	ADP: siemens-SADP
RUGGEDCOM ROX RX1400 Siemens	≥ 0; < V2.17.0 (affected, custom) Other versions: unknown	ADP: siemens-SADP
RUGGEDCOM ROX RX1500 Siemens	≥ 0; < V2.17.0 (affected, custom) Other versions: unknown	ADP: siemens-SADP
RUGGEDCOM ROX RX1501 Siemens	≥ 0; < V2.17.0 (affected, custom) Other versions: unknown	ADP: siemens-SADP
RUGGEDCOM ROX RX1510 Siemens	≥ 0; < V2.17.0 (affected, custom) Other versions: unknown	ADP: siemens-SADP
RUGGEDCOM ROX RX1511 Siemens	≥ 0; < V2.17.0 (affected, custom) Other versions: unknown	ADP: siemens-SADP
RUGGEDCOM ROX RX1512 Siemens	≥ 0; < V2.17.0 (affected, custom) Other versions: unknown	ADP: siemens-SADP
RUGGEDCOM ROX RX1524 Siemens	≥ 0; < V2.17.0 (affected, custom) Other versions: unknown	ADP: siemens-SADP
RUGGEDCOM ROX RX1536 Siemens	≥ 0; < V2.17.0 (affected, custom) Other versions: unknown	ADP: siemens-SADP
RUGGEDCOM ROX RX5000 Siemens	≥ 0; < V2.17.0 (affected, custom) Other versions: unknown	ADP: siemens-SADP

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 5.3 medium	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`	CNA: redhat

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://access.redhat.com/errata/RHSA-2025:17347CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:4049CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:7077CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:8021CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:8385CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30849CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30850CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33125CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2024-12133CNA: redhat · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2344611CNA: redhat · issue-tracking, x_refsource_REDHAT
https://gitlab.com/gnutls/libtasn1/-/blob/master/doc/security/CVE-2024-12133.mdCNA: redhat
https://gitlab.com/gnutls/libtasn1/-/issues/52CNA: redhat
http://www.openwall.com/lists/oss-security/2025/02/06/6ADP: CVE
https://lists.debian.org/debian-lts-announce/2025/02/msg00025.htmlADP: CVE
https://security.netapp.com/advisory/ntap-20250523-0003/ADP: CVE
https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlADP: siemens-SADP
https://cert-portal.siemens.com/productcert/html/ssa-202008.htmlADP: siemens-SADP

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