Bug 565997 - (CVE-2010-3444) CVE-2010-3444 pyfribidi: buffer overflow when processing Arabic UTF-8 strings
CVE-2010-3444 pyfribidi: buffer overflow when processing Arabic UTF-8 strings
Status: NEW
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: 565998
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Reported: 2010-02-16 16:15 EST by Vincent Danen
Modified: 2015-07-29 09:17 EDT (History)
1 user (show)

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Description Vincent Danen 2010-02-16 16:15:47 EST
It was reported [1] that pyfribidi contains a buffer overflow in the log2vis_utf8() function due to the assumption that the string returned by fribidi_unicode_to_utf8() will be the same length as the original UTF-8 string.  Due to changes in fribidi 0.19.1, for the Arabic language this is not the case as the joining added in fribidi causes some of the original 2-byte UTF-8 sequences to be come 3-bytes long.

The upstream report also includes a patch that is supposed to correct the issue by increasing the size of the buffer passed to fribidi_unicode_to_utf8().

Due to Fedora 11 and 12 containing fribidi 0.19.2, this would affect Fedora.

[1] http://sourceforge.net/tracker/?func=detail&aid=2676136&group_id=158366&atid=807545
Comment 2 Vincent Danen 2010-10-01 16:03:48 EDT
This has been assigned the name CVE-2010-3444.

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