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Vorbis Tools Division-By-Zero / Integer Overflow

Vorbis Tools Division-By-Zero / Integer Overflow
Posted Jan 20, 2015
Authored by Paris Zoumpouloglou

Vorbis Tools suffers from a division-by-zero bug and integer overflow vulnerabilities.

tags | advisory, overflow, vulnerability
SHA-256 | cb728a9c129d83a52648cfa3d767d20a9d0a57fd06b201dd2c27d486a7b8099b

Vorbis Tools Division-By-Zero / Integer Overflow

Change Mirror Download
----------
Background
----------

Vorbis tools is a package containing tools to use, manipulate and create
Vorbis files.

----------------
Software Version
----------------

All tests were performed using vorbis-tools latest svn (Revision: 19440)

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Description
-----------

During a fuzzing session (using afl-fuzzer) two issues were discovered
in oggenc tool of vorbis-tools :

* a division by zero bug
* an integer overflow leading to out-of-bounds memory read


Both issues are triggered by the number of channels in the input WAV file.

More info can be found at :

https://trac.xiph.org/ticket/2137 (division by zero)
https://trac.xiph.org/ticket/2136 (integer overflow)


--------
Timeline
--------

2014-12-29 Issue reported to xiph.org bug tracker
2014-01-18 No response, public disclosure

--
Paris Zoumpouloglou
@pzmini0n

https://projectzero.gr




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