Mozilla Firefox before 2.0.0.8, Thunderbird before 2.0.0.8, and SeaMonkey before 1.1.5 allows remote attackers to execute arbitrary commands via a (1) mailto, (2) nntp, (3) news, or (4) snews URI with invalid "%" encoding, related to improper file type handling on Windows XP with Internet Explorer 7 installed, a variant of CVE-2007-3845.
http://xs-sniper.com/blog/2007/09/01/firefox-file-handling-woes/
http://www.vupen.com/english/advisories/2008/0083
http://www.vupen.com/english/advisories/2008/0082
http://www.vupen.com/english/advisories/2007/3544
http://www.securityfocus.com/bid/25543
http://www.mozilla.org/security/announce/2007/mfsa2007-36.html
http://www.mandriva.com/en/security/advisories?name=MDKSA-2007:202
http://slackware.com/security/viewer.php?l=slackware-security&y=2007&m=slackware-security.471007
http://secunia.com/advisories/28398
http://secunia.com/advisories/28363
http://secunia.com/advisories/27744
http://secunia.com/advisories/27414
http://secunia.com/advisories/27360
http://secunia.com/advisories/27315
http://secunia.com/advisories/27311
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00774579
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00771742