Visual truncation vulnerability in netwerk/dns/src/nsIDNService.cpp in Mozilla Firefox before 3.0.11 and SeaMonkey before 1.1.17 allows remote attackers to spoof the location bar via an IDN with invalid Unicode characters that are displayed as whitespace, as demonstrated by the \u115A through \u115E characters.
https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00657.html
https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00574.html
https://rhn.redhat.com/errata/RHSA-2009-1095.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10436
https://bugzilla.redhat.com/show_bug.cgi?id=503573
http://www.vupen.com/english/advisories/2009/1572
http://www.securityfocus.com/bid/35388
http://www.securityfocus.com/bid/35326
http://www.mozilla.org/security/announce/2009/mfsa2009-25.html
http://www.debian.org/security/2009/dsa-1820
http://sunsolve.sun.com/search/document.do?assetkey=1-66-264308-1
http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.372468
http://secunia.com/advisories/35468
http://secunia.com/advisories/35439
http://secunia.com/advisories/35431
http://secunia.com/advisories/35415