Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2009-3639

Severity CVSS v4.0:
Pending analysis
Type:
CWE-310 Cryptographic Issues
Publication date:
28/10/2009
Last modified:
09/04/2025

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.

Impact

Vector 2.0
AV:N/AC:M/Au:N/C:N/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.80 MEDIUM
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): None
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0
5.80
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:proftpd:proftpd:*:a:*:*:*:*:*:* 1.3.2 (including)
cpe:2.3:a:proftpd:proftpd:1.3.1:*:*:*:*:*:*:*
cpe:2.3:a:proftpd:proftpd:1.3.2:*:*:*:*:*:*:*
cpe:2.3:a:proftpd:proftpd:1.3.2:rc1:*:*:*:*:*:*
cpe:2.3:a:proftpd:proftpd:1.3.2:rc2:*:*:*:*:*:*
cpe:2.3:a:proftpd:proftpd:1.3.2:rc4:*:*:*:*:*:*
cpe:2.3:a:proftpd:proftpd:1.3.3:rc1:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools