Firefox 1.0.6 and Mozilla 1.7.10 allows attackers to execute arbitrary commands via shell metacharacters in a URL that is provided to the browser on the command line, which is sent unfiltered to bash.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11105
https://bugzilla.mozilla.org/show_bug.cgi?id=307185
http://www.vupen.com/english/advisories/2005/1824
http://www.vupen.com/english/advisories/2005/1794
http://www.ubuntu.com/usn/usn-200-1
http://www.ubuntu.com/usn/usn-186-2
http://www.ubuntu.com/usn/usn-186-1
http://www.securityfocus.com/bid/15495
http://www.securityfocus.com/bid/14888
http://www.redhat.com/support/errata/RHSA-2005-791.html
http://www.redhat.com/support/errata/RHSA-2005-785.html
http://www.mozilla.org/security/announce/mfsa2005-58.html
http://www.mandriva.com/security/advisories?name=MDKSA-2005:174
http://www.kb.cert.org/vuls/id/914681
http://www.debian.org/security/2005/dsa-868
http://www.debian.org/security/2005/dsa-866
http://secunia.com/advisories/17284
http://secunia.com/advisories/17263
http://secunia.com/advisories/17149
http://secunia.com/advisories/17090