Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Proftpd | Proftpd | <= 1.3.2 |
Related Weaknesses (CWE)
References
- http://bugs.proftpd.org/show_bug.cgi?id=3275
- http://marc.info/?l=oss-security&m=125630966510672&w=2
- http://marc.info/?l=oss-security&m=125632960508211&w=2
- http://secunia.com/advisories/37131Vendor Advisory
- http://secunia.com/advisories/37219
- http://www.debian.org/security/2009/dsa-1925
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:288
- http://www.securityfocus.com/bid/36804Patch
- https://bugzilla.redhat.com/show_bug.cgi?id=530719Patch
- https://exchange.xforce.ibmcloud.com/vulnerabilities/53936
- https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00642.h
- https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00649.h
- http://bugs.proftpd.org/show_bug.cgi?id=3275
- http://marc.info/?l=oss-security&m=125630966510672&w=2
- http://marc.info/?l=oss-security&m=125632960508211&w=2
FAQ
What is CVE-2009-3639?
CVE-2009-3639 is a vulnerability with a CVSS score of 5.8 (MEDIUM). 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 Altern...
How severe is CVE-2009-3639?
CVE-2009-3639 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2009-3639?
Check the references section above for vendor advisories and patch information. Affected products include: Proftpd Proftpd.