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No exploitation reportedFix available

CVE-2024-12133

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

No exploitation reported by the sources we read.

  • Published2025-02-10
  • WeaknessCWE-407

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2025-02-1015:28CVE publishedCNA

Versions per branch

Products declared by the CNA23 products

As redhat, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

17 more products in the CVE record.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-05

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • gnutlsRed Hat:rhel_tus:8.8::baseosall versions · fixed in 0:3.6.16-7.el8_8.4and 5 other packages
  • gnutlsRed Hat:rhel_eus_long_life:8.6::baseosall versions · fixed in 0:3.6.16-5.el8_6.5and 5 other packages
  • gnutlsRed Hat:rhel_eus_long_life:8.4::baseosall versions · fixed in 0:3.6.14-10.el8_4.1and 4 other packages
  • gnutlsRed Hat:rhel_e4s:8.8::baseosall versions · fixed in 0:3.6.16-7.el8_8.4and 5 other packages
  • gnutlsRed Hat:rhel_aus:8.6::baseosall versions · fixed in 0:3.6.16-5.el8_6.5and 5 other packages
  • gnutlsRed Hat:rhel_aus:8.4::baseosall versions · fixed in 0:3.6.14-10.el8_4.1and 4 other packages
  • gnutlsopenSUSE:Tumbleweedall versions · fixed in 3.8.9-1.1
  • gnutlsAzure Linux:3all versions · fixed in 3.8.3-4

86 more package ranges on OSV.dev

Vendor advisories

  • CVE-2024-12133 Red Hat Product Security470 products fixed · 9 known affected

    libtasn1: Inefficient DER Decoding in libtasn1 Leading to Potential Remote DoS

    libtasn1 as a component of Red Hat Enterprise Linux 6 · libtasn1-devel as a component of Red Hat Enterprise Linux 6 · libtasn1-tools as a component of Red Hat Enterprise Linux 6 · +6 more

  • RHSA-2026:33125 Red Hat Product Security88 products fixed

    Red Hat Security Advisory: gnutls and libtasn1 security update

  • RHSA-2026:30849 Red Hat Product Security88 products fixed

    Red Hat Security Advisory: gnutls and libtasn1 security update

  • RHSA-2026:30850 Red Hat Product Security110 products fixed

    Red Hat Security Advisory: gnutls and libtasn1 security update

  • RHSA-2025:17347 Red Hat Product Security45 products fixed

    Red Hat Security Advisory: libtasn1 security update

  • RHSA-2025:8385 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: A Subscription Management tool for finding and reporting Red Hat product usage

3 more advisories

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2026:33125 · 88 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  2. Vendor fix Red Hat Product Security RHSA-2025:8385 · 4 productsThe containers required to run Discovery can be installed through discovery-installer RPM. See the official documentation for more details.
  3. No fix available, says the vendor Red Hat Product Security CVE-2024-12133 · 1 productFix deferred
  4. No fix planned, says the vendor Red Hat Product Security CVE-2024-12133 · 8 productsOut of support scope

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Published
2025-02-10
Last Modified
2026-11-05
NVD status
Deferred
GitHub Advisory
GHSA-j3qr-8f3v-fgjj

Frequently asked questions

What is CVE-2024-12133?

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.

Is CVE-2024-12133 actively exploited?

Active exploitation of CVE-2024-12133 has not been confirmed. Its EPSS score was 1.1% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-12133?

CVE-2024-12133 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

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