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.
Published: 2009-10-28
Score: 5.8 Medium
EPSS: 1.4% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-1925-1 New proftpd-dfsg packages fix SSL certificate verification weakness
EUVD EUVD EUVD-2009-3614 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.
History

Wed, 28 May 2025 14:45:00 +0000

Type Values Removed Values Added
References

Thu, 22 May 2025 04:30:00 +0000


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-07T06:38:28.465Z

Reserved: 2009-10-09T00:00:00.000Z

Link: CVE-2009-3639

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2009-10-28T14:30:00.217

Modified: 2026-04-23T00:35:47.467

Link: CVE-2009-3639

cve-icon Redhat

Severity : Low

Publid Date: 2009-08-06T00:00:00Z

Links: CVE-2009-3639 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses