CVE-2024-12133 (CVSS 5.3)

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.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness Type (CWE)

CWE-407 CWE-407

References

Other References

https://access.redhat.com/errata/RHSA-2025:17347 https://access.redhat.com/errata/RHSA-2025:4049 https://access.redhat.com/errata/RHSA-2025:7077 https://access.redhat.com/errata/RHSA-2025:8021 https://access.redhat.com/errata/RHSA-2025:8385 https://access.redhat.com/security/cve/CVE-2024-12133 https://bugzilla.redhat.com/show_bug.cgi?id=2344611 https://gitlab.com/gnutls/libtasn1/-/blob/master/doc/security/CVE-2024-12133.md https://gitlab.com/gnutls/libtasn1/-/issues/52 http://www.openwall.com/lists/oss-security/2025/02/06/6

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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2024-12133? +

CVE-2024-12133 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2024-12133? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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