Multiple vulnerabilities in GnuTLS

Published: 2024-03-20

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2024-28835 CVE-2024-28834
CWE-ID	CWE-20 CWE-310
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	GnuTLS Universal components / Libraries / Libraries used by multiple products
Vendor	GnuTLS

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU87672

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-28835

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input when parsing the cert_list_size parameter in the gnutls_x509_trust_list_verify_crt2() function in certtool. A remote attacker can pass specially crafted PEM encoded certificate chain that contains more than 16 certificates to the certtool and crash it.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

GnuTLS: 3.0 - 3.8.3

External links

http://gitlab.com/gnutls/gnutls/-/issues/1527
http://gitlab.com/gnutls/gnutls/-/issues/1525

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.

2) Cryptographic issues

EUVDB-ID: #VU87671

Risk: Medium

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-28834

CWE-ID: CWE-310 - Cryptographic Issues