CVE-2024-12243: Gnutls: gnutls impacted by inefficient der decoding in libtasn1 leading to remote dos

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-02-10 · updated 2026-10-22
Weakness: CWE-407

Description

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.

Affected products

Red Hat OpenShift Container Platform 4.18: all versions
Red Hat Discovery 1.14: all versions — fixed in 1.14.2-1748467619, 1.14.3-1748529279
Red Hat Enterprise Linux 8: all versions — fixed in 0:3.6.16-8.el8_10.3
Red Hat Enterprise Linux 9: all versions — fixed in 0:3.8.3-6.el9
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions: all versions — fixed in 0:3.7.6-21.el9_2.4
Red Hat Enterprise Linux 9.4 Extended Update Support: all versions — fixed in 0:3.8.3-4.el9_4.2

How to fix

Upgrade to a fixed version: Red Hat Discovery 1.14 1.14.2-1748467619, 1.14.3-1748529279; Red Hat Enterprise Linux 8 0:3.6.16-8.el8_10.3; Red Hat Enterprise Linux 9 0:3.8.3-6.el9; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:3.7.6-21.el9_2.4; Red Hat Enterprise Linux 9.4 Extended Update Support 0:3.8.3-4.el9_4.2. Check the vendor advisory for mitigations.

References

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