HTTP CONNECT and 407 Proxy Authentication Required messages are not integrity protected

Overview HTTP CONNECT requests and 407 Proxy Authentication Required messages are not integrity protected and are susceptible to man-in-the-middle attacks. WebKit-based applications are additionally vulnerable to arbitrary HTML markup and JavaScript execution in the context of the originally...

CVE-2014-8639: Undefined Security Weakness

Mozilla Firefox before 35.0, Firefox ESR 31.x before 31.4, Thunderbird before 31.4, and SeaMonkey before 2.32 do not properly interpret Set-Cookie headers within responses that have a 407 aka Proxy Authentication Required status code, which allows remote HTTP proxy servers to conduct session...