CVE-2024-12243
Published: February 11, 2025Last modified: November 28, 2025
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | LOW |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
Notes
The real problem seems to the the libtasn1 bug (listed in the references section above) that has it's own report: CVE-2024-12133 GnuTLS issue for this is https://gitlab.com/gnutls/gnutls/-/issues/1553 The backport to 3.7 is in https://gitlab.com/gnutls/gnutls/-/merge_requests/1937
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | gnutls | Vulnerable (3.7.8-r2) |
| 25 LTS | gnutls | Vulnerable (3.8.8-r0) | |
| Stream | gnutls | Vulnerable (3.8.8-r0) |
References
- https://access.redhat.com/errata/RHSA-2025:17361
- https://access.redhat.com/errata/RHSA-2025:4051
- https://access.redhat.com/errata/RHSA-2025:7076
- https://access.redhat.com/errata/RHSA-2025:8020
- https://access.redhat.com/errata/RHSA-2025:8385
- 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://security.netapp.com/advisory/ntap-20250523-0002/