CVE-2024-12243 Gnutls: gnutls impacted by inefficient der decoding in libtasn1 leading to remote dos
Medium 5.3
Published
Updated
Check this codebase for CVE-2024-12243 and fix it if it is affected.
What it is: CVE-2024-12243 is a medium-severity denial of service vulnerability in Red Hat Discovery 1.14, published on 10 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-12243 in the wild and no public exploit code.
Affected product: Red Hat Discovery 1.14. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2024-12243/ (Markdown: https://insights.sbomify.com/CVE-2024-12243/index.md)
Remote attackers can cause denial of service in GnuTLS by sending crafted certificates that trigger inefficient DER decoding in libtasn1.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-12243?
CVE-2024-12243 is a medium-severity denial of service vulnerability in Red Hat Discovery 1.14, published on 10 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-407
Which versions are affected by CVE-2024-12243?
Linux distribution packages (40)
gnutls AlmaLinux:8 | All versions | 3.6.16-8.el8_10.3 |
gnutls-c++ AlmaLinux:8 | All versions | 3.6.16-8.el8_10.3 |
gnutls-dane AlmaLinux:8 | All versions | 3.6.16-8.el8_10.3 |
gnutls-devel AlmaLinux:8 | All versions | 3.6.16-8.el8_10.3 |
gnutls-utils AlmaLinux:8 | All versions | 3.6.16-8.el8_10.3 |
gnutls AlmaLinux:9 | All versions | 3.8.3-6.el9 |
gnutls-c++ AlmaLinux:9 | All versions | 3.8.3-6.el9 |
gnutls-dane AlmaLinux:9 | All versions | 3.8.3-6.el9 |
gnutls-devel AlmaLinux:9 | All versions | 3.8.3-6.el9 |
gnutls-utils AlmaLinux:9 | All versions | 3.8.3-6.el9 |
gnutls-c++ Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-8.el8_10.3 |
gnutls-c++-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-8.el8_10.3 |
gnutls-dane Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-8.el8_10.3 |
gnutls-dane-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-8.el8_10.3 |
gnutls-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-8.el8_10.3 |
gnutls-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-8.el8_10.3 |
gnutls-devel Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-8.el8_10.3 |
gnutls-utils Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-8.el8_10.3 |
gnutls-utils-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-8.el8_10.3 |
gnutls Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.16-8.el8_10.3 |
gnutls-c++-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.16-8.el8_10.3 |
gnutls-dane-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.16-8.el8_10.3 |
gnutls-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.16-8.el8_10.3 |
gnutls-debugsource Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.16-8.el8_10.3 |
gnutls-utils-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.16-8.el8_10.3 |
gnutls-c++ Red Hat:enterprise_linux:9::appstream | All versions | 0:3.8.3-6.el9 |
gnutls-c++-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:3.8.3-6.el9 |
gnutls-dane Red Hat:enterprise_linux:9::appstream | All versions | 0:3.8.3-6.el9 |
gnutls-dane-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:3.8.3-6.el9 |
gnutls-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:3.8.3-6.el9 |
gnutls-debugsource Red Hat:enterprise_linux:9::appstream | All versions | 0:3.8.3-6.el9 |
gnutls-devel Red Hat:enterprise_linux:9::appstream | All versions | 0:3.8.3-6.el9 |
gnutls-utils Red Hat:enterprise_linux:9::appstream | All versions | 0:3.8.3-6.el9 |
gnutls-utils-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:3.8.3-6.el9 |
gnutls Red Hat:enterprise_linux:9::baseos | All versions | 0:3.8.3-6.el9 |
gnutls-c++-debuginfo Red Hat:enterprise_linux:9::baseos | All versions | 0:3.8.3-6.el9 |
gnutls-dane-debuginfo Red Hat:enterprise_linux:9::baseos | All versions | 0:3.8.3-6.el9 |
gnutls-debuginfo Red Hat:enterprise_linux:9::baseos | All versions | 0:3.8.3-6.el9 |
gnutls-debugsource Red Hat:enterprise_linux:9::baseos | All versions | 0:3.8.3-6.el9 |
gnutls-utils-debuginfo Red Hat:enterprise_linux:9::baseos | All versions | 0:3.8.3-6.el9 |
How do I fix CVE-2024-12243?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-12243 being exploited?
There is no known exploitation of CVE-2024-12243 in the wild and no public exploit code.
Sources
Also known as ALPINE-CVE-2024-12243, ALSA-2025:4051, ALSA-2025:7076, AZL-56752, AZL-56762, BELL-CVE-2024-12243 and 30 more.