Description
aMSN (aka Alvaro's Messenger) 0.98.3 and earlier, when SSL is used, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) field or a Subject Alternative Name field of the X.509 certificate, which allows man-in-the-middle attackers to spoof an MSN server via an arbitrary certificate.
References
- FEDORA-2010-7373 vendor-advisory
- http://amsn.svn.sourceforge.net/viewvc/amsn/trunk/?view=log&pathrev=11991
- [oss-security] 20100310 CVE Request -- aMSN -- improper SSL certificate validation (MITM) mailing-list
- 39796 third-party-advisory
- http://amsn.svn.sourceforge.net/viewvc/amsn/trunk/amsn/sip.tcl?r1=11953&r2=11991&pathrev=11991
- http://amsn.svn.sourceforge.net/viewvc/amsn/trunk/amsn/proxy.tcl?r1=11886&r2=11991&pathrev=11991
- 35507 vdb-entry
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=572818
- [oss-security] 20100401 Re: CVE Request -- aMSN -- improper SSL certificate validation (MITM) mailing-list
- 20090626 aMSN SSL Certificate Vulnerability mailing-list
- http://www.opensource-archive.org/showthread.php?p=183821
- http://amsn.svn.sourceforge.net/viewvc/amsn/trunk/amsn/soap.tcl?r1=11891&r2=11991&pathrev=11991
- 35621 third-party-advisory
- ADV-2010-1109 vdb-entry
- FEDORA-2010-7378 vendor-advisory