CVE-2015-6855

NameCVE-2015-6855
Descriptionhw/ide/core.c in QEMU does not properly restrict the commands accepted by an ATAPI device, which allows guest users to cause a denial of service or possibly have unspecified other impact via certain IDE commands, as demonstrated by a WIN_READ_NATIVE_MAX command to an empty drive, which triggers a divide-by-zero error and instance crash.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-3361-1, DSA-3362-1
NVD severityhigh (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
qemu (PTS)wheezy1.1.2+dfsg-6a+deb7u12fixed
wheezy (security)1.1.2+dfsg-6+deb7u23fixed
jessie (security), jessie1:2.1+dfsg-12+deb8u6fixed
stretch1:2.8+dfsg-6fixed
stretch (security)1:2.8+dfsg-6+deb9u2fixed
buster, sid1:2.8+dfsg-7fixed
qemu-kvm (PTS)wheezy1.1.2+dfsg-6+deb7u12fixed
wheezy (security)1.1.2+dfsg-6+deb7u23fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qemusource(unstable)1:2.4+dfsg-2high
qemusourcejessie1:2.1+dfsg-12+deb8u4highDSA-3361-1
qemusourcesqueeze(unfixed)end-of-life
qemusourcewheezy1.1.2+dfsg-6a+deb7u11highDSA-3361-1
qemu-kvmsource(unstable)(unfixed)high
qemu-kvmsourcesqueeze(unfixed)end-of-life
qemu-kvmsourcewheezy1.1.2+dfsg-6+deb7u11highDSA-3362-1

Notes

[squeeze] - qemu <end-of-life> (Not supported in Squeeze LTS)
[squeeze] - qemu-kvm <end-of-life> (Not supported in Squeeze LTS)
http://www.openwall.com/lists/oss-security/2015/09/10/1
Fix commit: http://git.qemu.org/?p=qemu.git;a=commit;h=d9033e1d3aa666c5071580617a57bd853c5d794a
exec_cmd introduced in http://git.qemu.org/?p=qemu.git;a=commit;h=7cff87ff6ab117799e32e42c2e4dc4c0588e583a
cmd_table introduced in http://git.qemu.org/?p=qemu.git;a=commit;h=844505b12e722d9ba7060480e766351fc6313501

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