Improper Certificate Validation in GnuTLS GnuTLS

Published: 2020-01-27 | Updated: 2020-07-17

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2015-0294
CWE-ID	CWE-295
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 one medium risk vulnerability.

1) Improper Certificate Validation

EUVDB-ID: #VU30423

Risk: Medium

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

CVE-ID: CVE-2015-0294

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

GnuTLS before 3.3.13 does not validate that the signature algorithms match when importing a certificate.

Mitigation

Install update from vendor's website.

Vulnerable software versions

GnuTLS: 3.3.0 - 3.3.12

External links

http://www.debian.org/security/2015/dsa-3191
http://bugzilla.redhat.com/show_bug.cgi?id=1196323
http://gitlab.com/gnutls/gnutls/commit/6e76e9b9fa845b76b0b9a45f05f4b54a052578ff

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.