CVE-2024-12243: Gnutls: gnutls impacted by inefficient der decoding in libtasn1 leading to remote dos
First published: Mon Feb 10 2025(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/gnutls28 | <=3.7.1-5+deb11u5<=3.7.9-2+deb12u3 | 3.7.1-5+deb11u7 3.7.9-2+deb12u4 3.8.9-2 |
| F5 Traffix Systems Signaling Delivery Controller | =5.2.0 | |
| F5 Traffix Systems Signaling Delivery Controller | ||
| F5 Traffix Systems Signaling Delivery Controller |
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Reference Links
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-12243
- https://nvd.nist.gov/vuln/detail/CVE-2024-12243
- https://launchpad.net/bugs/cve/CVE-2024-12243
- https://security-tracker.debian.org/tracker/CVE-2024-12243
- https://ubuntu.com/security/CVE-2024-12243
- https://www.gnutls.org/security-new.html#GNUTLS-SA-2025-02-07
- https://lists.gnupg.org/pipermail/gnutls-help/2025-February/004875.html
- https://gitlab.com/gnutls/gnutls/-/issues/1553
- https://gitlab.com/gnutls/gnutls/-/commit/4760bc63531e3f5039e70ede91a20e1194410892
- https://access.redhat.com/security/cve/CVE-2024-12243
- https://bugzilla.redhat.com/show_bug.cgi?id=2344615
- https://gitlab.com/gnutls/libtasn1/-/issues/52
- https://lists.debian.org/debian-lts-announce/2025/02/msg00027.html
- https://access.redhat.com/errata/RHSA-2025:4051
- https://my.f5.com/manage/s/article/K000151130
Frequently Asked Questions
What is the severity of CVE-2024-12243?
CVE-2024-12243 is classified as a medium severity vulnerability due to its potential to cause resource exhaustion.
How do I fix CVE-2024-12243?
To fix CVE-2024-12243, update to the latest versions of GnuTLS and libtasn1 that contain the security patch.
Who is affected by CVE-2024-12243?
CVE-2024-12243 affects users and applications that utilize GnuTLS and libtasn1 for ASN.1 data processing.
What are the implications of CVE-2024-12243?
The implications of CVE-2024-12243 include potential denial of service due to high resource consumption from processing malicious DER-encoded certificates.
How can attackers exploit CVE-2024-12243?
Attackers can exploit CVE-2024-12243 by sending specially crafted DER-encoded certificate data to the affected system.
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