CVE-2009-3639

MediumCVSS 5.8/10Last modified Jun 16, 2026

Description

The mod_tls module in ProFTPD before 1.3.2b, and 1.3.3 before 1.3.3rc2, when the dNSNameRequired TLS option is enabled, does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 client certificate, which allows remote attackers to bypass intended client-hostname restrictions via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

Metrics

CVSS 2.0 5.8/10AV:N/AC:M/Au:N/C:N/I:P/A:P

Weakness enumeration

CWE-310

Affected software

No affected versions have been published.

Timeline

Published
Oct 28, 2009
Last modified
Jun 16, 2026
NVD status
Modified

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