Strix
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CVE-2014-8639

UnknownEPSS 1.90%

Last modified

CVE-2014-8639 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.90% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
1.90%

77.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
MozillaSeamonkey<= 2.31
MozillaFirefox<= 34.0.5
MozillaFirefox31.0
MozillaFirefox31.1.0
MozillaFirefox31.1.1
MozillaFirefox31.3.0
MozillaFirefox Esr31.2
MozillaThunderbird<= 31.3.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2014-8639?
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.
How severe is CVE-2014-8639?
Severity scoring for CVE-2014-8639 is pending analysis. The EPSS model estimates a 1.90% probability of exploitation in the next 30 days.
How do I fix CVE-2014-8639?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2014-8639?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST