SB2017081742 - Cryptographic issues in ProFTPD
Published: August 17, 2017 Updated: June 23, 2025
Security Bulletin ID
SB2017081742
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Cryptographic issues (CVE-ID: CVE-2009-3639)
The vulnerability allows a remote non-authenticated attacker to manipulate or delete data.
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 ' ' 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.
Remediation
Install update from vendor's website.
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/37131
- 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/36804
- https://bugzilla.redhat.com/show_bug.cgi?id=530719
- https://exchange.xforce.ibmcloud.com/vulnerabilities/53936
- https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00642.html
- https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00649.html