Multiple untrusted search path vulnerabilities in updater.exe in Mozilla Updater in Mozilla Firefox before 23.0, Firefox ESR 17.x before 17.0.8, Thunderbird before 17.0.8, and Thunderbird ESR 17.x before 17.0.8 on Windows 7, Windows Server 2008 R2, Windows 8, and Windows Server 2012 allow local users to gain privileges via a Trojan horse DLL in (1) the update directory or (2) the current working directory.