| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | = 31.0= 31.1.0= 31.1.1= 31.3.0≤ 34.0.5 | |
| firefox esr | = 31.2 | |
| seamonkey | ≤ 2.31 | |
| thunderbird | ≤ 31.3.0 |
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 fixation attacks by providing a cookie name that corresponds to the session cookie of the origin server.
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