#VU103980 Resource exhaustion in libtASN1 - CVE-2024-12133

Vulnerability identifier: #VU103980

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-12133

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libtASN1
Universal components / Libraries / Libraries used by multiple products

Vendor: GNU

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources processing a large number of SEQUENCE OF or SET OF elements in a certificate. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libtASN1: 0.1.0 - 4.19.0

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External links
https://www.openwall.com/lists/oss-security/2025/02/06/6
https://bugzilla.redhat.com/show_bug.cgi?id=2344611
https://gitlab.com/gnutls/libtasn1/-/issues/52
https://gitlab.com/gnutls/libtasn1/-/blob/master/doc/security/CVE-2024-12133.md

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.