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Last updated: 12/19/2014 8:35:23 AM

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Vulnerability Summary for CVE-2009-3639

Original release date: 10/28/2009
Last revised: 12/19/2009
Source: US-CERT/NIST

Overview

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.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 5.8 (MEDIUM) (AV:N/AC:M/Au:N/C:N/I:P/A:P) (legend)
Impact Subscore: 4.9
Exploitability Subscore: 8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized modification; Allows disruption of service

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External Source: CONFIRM
Name: http://bugs.proftpd.org/show_bug.cgi?id=3275
External Source: FEDORA
Name: FEDORA-2009-11666
External Source: BID
Name: 36804
Type: Patch Information
External Source: MLIST
Name: [oss-security] 20091023 proftpd - mod_tls - Improper SSL/TLS certificate subjectAltName verification
External Source: MANDRIVA
Name: MDVSA-2009:288
External Source: DEBIAN
Name: DSA-1925
External Source: SECUNIA
Name: 37131
Type: Advisory
External Source: SECUNIA
Name: 37219
External Source: XF
Name: proftpd-modtls-security-bypass(53936)
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=530719
Type: Patch Information
External Source: MLIST
Name: [oss-security] 20091023 Re: proftpd - mod_tls - Improper SSL/TLS certificate subjectAltName verification
External Source: FEDORA
Name: FEDORA-2009-11649

Technical Details

Vulnerability Type (View All)