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CVE-2009-3639

Date: October 28, 2009

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.

Severity Score

Related Resources (14)

http://secunia.com/advisories/37219
http://marc.info/?l=oss-security&m=125632960508211&w=2
http://www.debian.org/security/2009/dsa-1925
https://bugzilla.redhat.com/show_bug.cgi?id=530719
http://marc.info/?l=oss-security&m=125630966510672&w=2
https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00649.html
http://bugs.proftpd.org/show_bug.cgi?id=3275
http://secunia.com/advisories/37131
https://nvd.nist.gov/vuln/detail/CVE-2009-3639
https://exchange.xforce.ibmcloud.com/vulnerabilities/53936
http://www.mandriva.com/security/advisories?name=MDVSA-2009:288
http://www.securityfocus.com/bid/36804
https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00642.html
https://www.mend.io/vulnerability-database/CVE-2009-3639

Severity Score

Weakness Type (CWE)

Cryptographic Issues

CWE-310

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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