CVE-2014-0142: Divide by Zero
First published: Wed Mar 19 2014(Updated: )
Qemu block drivers for parallels image and formats used by Bocsh are vulnerable to a crash caused by possible division by zero error, in seek_to_sector routine. It could occur if 's->tracks' & 's->extent_size' fields are 0. These are used to derive 'index' and 'offset' values in seek_to_sector() routine. An user able to alter the Qemu disk image could use this flaw to crash the Qemu instance resulting in DoS. Upstream fixes: --------------- parallels: Sanity check for s->tracks -> <a href="http://git.qemu.org/?p=qemu.git;a=commit;h=9302e863aa8baa5d932fc078967050c055fa1a7f">http://git.qemu.org/?p=qemu.git;a=commit;h=9302e863aa8baa5d932fc078967050c055fa1a7f</a> bochs: Check extent_size header field -> <a href="http://git.qemu.org/?p=qemu.git;a=commit;h=8e53abbc20d08ae3ec30c2054e1161314ad9501d">http://git.qemu.org/?p=qemu.git;a=commit;h=8e53abbc20d08ae3ec30c2054e1161314ad9501d</a>
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| QEMU qemu | <=2.0.0 |
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Reference Links
- http://git.qemu.org/?p=qemu.git;a=commit;h=9302e863aa8baa5d932fc078967050c055fa1a7f
- http://git.qemu.org/?p=qemu.git;a=commit;h=8e53abbc20d08ae3ec30c2054e1161314ad9501d
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1086710
- https://rhn.redhat.com/errata/RHSA-2014-0421.html
- https://rhn.redhat.com/errata/RHSA-2014-0420.html
- https://rhn.redhat.com/errata/RHSA-2014-0435.html
- https://rhn.redhat.com/errata/RHSA-2014-0434.html
- https://rhn.redhat.com/errata/RHSA-2014-0674.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1078201
- http://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=8e53abbc20d08ae3ec30c2054e1161314ad9501d
- http://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=9302e863aa8baa5d932fc078967050c055fa1a7f
- http://rhn.redhat.com/errata/RHSA-2014-0420.html
- http://rhn.redhat.com/errata/RHSA-2014-0421.html
- http://www.debian.org/security/2014/dsa-3044
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