Bug 1193439 - flac: NULL pointer dereference and integer underflow in EncoderSession_init_encoder()
Summary: flac: NULL pointer dereference and integer underflow in EncoderSession_init_e...
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1193445
Blocks: 1193444
TreeView+ depends on / blocked
 
Reported: 2015-02-17 10:51 UTC by Vasyl Kaigorodov
Modified: 2019-09-29 13:28 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2015-02-26 09:43:14 UTC
Embargoed:

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Description Vasyl Kaigorodov 2015-02-17 10:51:27 UTC 
It was reported [1] that flac crashes on processing a crafted [2] file.

Related code:
  src/flac/encoder.c line:1878
    Function EncoderSession_init_encoder()

[1]: http://sourceforge.net/p/flac/bugs/425/
[2]: http://sourceforge.net/projects/pocfiles/files/t2.flac/download
Comment 1 Vasyl Kaigorodov 2015-02-17 10:57:01 UTC 
Created flac tracking bugs for this issue:

Affects: fedora-all [bug 1193445]
Comment 3 Tomas Hoger 2015-02-26 14:45:38 UTC 
This is a NULL pointer dereference (cs->tracks is NULL) combined with integer underflow issue (cs->num_tracks is 0, so cs->num_tracks - 1 underflows) that leads to out of bounds read.  The flaw is in the flac command line tool rather than libFLAC library.

Fixed upstream in:
https://git.xiph.org/?p=flac.git;a=commitdiff;h=c06a44969c1145242a22f75fc8fb2e8b54c55303

Affects the currently latest upstream version 1.3.1.
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