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TITLE:
ProFTPD SSL Certificate NULL Character Processing Security Issue

SECUNIA ADVISORY ID:
SA37131

VERIFY ADVISORY:
http://secunia.com/advisories/37131/

DESCRIPTION:
A security issue has been reported in ProFTPD, which can be exploited
by malicious people to conduct spoofing attacks.

The security issues is caused due to an error in the "mod_tls" module
when processing client SSL certificates. This can be exploited to
trick a server into accepting a potentially malicious SSL certificate
by including a NULL character in the "subjectAltName" certificate
field.

This is related to vulnerability #2 in:
SA36093

NOTE: The security issue only affects systems having "UseReverseDNS"
and "TLSVerifyClient" enabled, and "dNSNameRequired" set in
"TLSOptions".

SOLUTION:
Update to version 1.3.2b.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://bugs.proftpd.org/show_bug.cgi?id=3275

OTHER REFERENCES:
SA36093:
http://secunia.com/advisories/36093/

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