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Case File

CVE-2009-3639

MEDIUM · CVSS 5.8 EPSS 5.70%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2009-10-28 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE
CVE-2009-3639
Severity
MEDIUM
CVSS
5.8
EPSS
5.70%

Original NVD 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.