Improper Certificate Validation in GnuTLS - CVE-2009-2730
Published: August 12, 2009 / Updated: April 30, 2026
Vulnerability identifier: #VU128566
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2009-2730
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GnuTLS
Affected software:
GnuTLS
GnuTLS
Detailed vulnerability description
The vulnerability allows a remote attacker to spoof certificate hostname validation.
The vulnerability exists due to improper certificate validation in certificate hostname validation when verifying certificates. A remote attacker can present a certificate with a mismatched hostname to spoof certificate hostname validation.
How to mitigate CVE-2009-2730
Install security update from vendor's website.