Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10 allow local users to obtain sensitive information via an HTML document that loads a shortcut (aka .lnk) file for display within an IFRAME element, as demonstrated by a network share implemented by (1) Microsoft Windows or (2) Samba.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16743
https://bugzilla.mozilla.org/show_bug.cgi?id=670514
http://www.mozilla.org/security/announce/2012/mfsa2012-37.html
http://www.mandriva.com/security/advisories?name=MDVSA-2012:088
http://rhn.redhat.com/errata/RHSA-2012-0715.html
http://rhn.redhat.com/errata/RHSA-2012-0710.html
http://lists.opensuse.org/opensuse-security-announce/2012-06/msg00015.html
http://lists.opensuse.org/opensuse-security-announce/2012-06/msg00012.html