Bug 977621 - (CVE-2013-1699) CVE-2013-1699 Mozilla: Homograph domain spoofing in .com, .net and .name (MFSA 2013-61)
CVE-2013-1699 Mozilla: Homograph domain spoofing in .com, .net and .name (MFS...
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: 972560
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Reported: 2013-06-24 22:19 EDT by Huzaifa S. Sidhpurwala
Modified: 2013-06-26 02:56 EDT (History)
1 user (show)

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Doc Type: Bug Fix
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Last Closed: 2013-06-24 22:27:55 EDT
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Description Huzaifa S. Sidhpurwala 2013-06-24 22:19:27 EDT
Security researcher 3ric Johanson reported in discussions with Richard Newman and Holt Sorenson that the prevention measures for homograph attacks with Internationalized Domain Names (IDN) were incomplete. IDN allows non-English speakers to use domains in their local language. Many supported characters are similar or identical to others in English, allowing for the potential spoofing of domain names and for phishing attacks when not blocked.

Mozilla had added .com, .net, and .name top-level domains to its IDN whitelist, allowing for IDN use without restrictions, when IDN registration protections at registrars were incomplete. This has been fixed by removing the .com, .net, and .name top-level domains from the IDN whitelist and implementing technical restrictions against script-mixing in domain labels. 

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Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges 3ric Johanson, Richard Newman and Holt Sorenson as the original reporter.


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

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