National Vulnerability Database (NVD) National Vulnerability Database (CVE-2009-3639)

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Last updated: Sat May 25 02:49:46 EDT 2013

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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: https://bugzilla.redhat.com/show_bug.cgi?id=530719

Type: Patch Information

Hyperlink:https://bugzilla.redhat.com/show_bug.cgi?id=530719

External Source: BID

Name: 36804

Type: Patch Information

Hyperlink:http://www.securityfocus.com/bid/36804

External Source: FEDORA

Name: FEDORA-2009-11666

Hyperlink:https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00649.html

External Source: FEDORA