Vulnerability identifier: #VU85624

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-0567

CWE-ID: CWE-617

Exploitation vector: Network

Exploit availability: No

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

Vendor: GnuTLS

Description

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

The vulnerability exists due to a reachable assertion when verifying a certificate chain with a cycle of cross signatures. A remote attacker can pass a specially crafted certificate to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

GnuTLS: 3.8.0 - 3.8.2

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External links
http://access.redhat.com/security/cve/CVE-2024-0567
http://bugzilla.redhat.com/show_bug.cgi?id=2258544
http://gitlab.com/gnutls/gnutls/-/issues/1521
http://lists.gnupg.org/pipermail/gnutls-help/2024-January/004841.html
http://www.openwall.com/lists/oss-security/2024/01/19/3

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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.