Bug 1301822 - (CVE-2016-1939) CVE-2016-1939 Mozilla: Firefox allows for control characters to be set in cookie names (MFSA 2016-04)
CVE-2016-1939 Mozilla: Firefox allows for control characters to be set in coo...
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
: Security
Depends On:
Blocks: 1300522
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Reported: 2016-01-25 23:11 EST by Huzaifa S. Sidhpurwala
Modified: 2016-01-26 23:50 EST (History)
1 user (show)

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Doc Type: Bug Fix
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Last Closed: 2016-01-26 23:50:37 EST
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Description Huzaifa S. Sidhpurwala 2016-01-25 23:11:48 EST
Security researcher musicDespiteEverything previously reported an issue where illegal control characters were stored in as cookie values in violation of RFC6265. While fixing this issue, Mozilla developer Nicholas Hurley realized that the same issue applied to the names of cookies. These characters have now been disallowed in cookie names. This issue could result in incorrect cookie handling by web servers. 

External Reference:



Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges musicDespiteEverything, Nicholas Hurley as the original reporter.


This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5, 6 and 7.

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