CVE-2016-1922

NameCVE-2016-1922
DescriptionQEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. It occurs while doing I/O port write operations via hmp interface. In that, 'current_cpu' remains null, which leads to the null pointer dereference. A user or process could use this flaw to crash the QEMU instance, resulting in DoS issue.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-3469-1, DSA-3470-1, DSA-3471-1
NVD severitylow (attack range: local)
Debian Bugs811201

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, jessie (security)1:2.1+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)1:2.5+dfsg-4low811201
qemusourcejessie1:2.1+dfsg-12+deb8u5alowDSA-3471-1
qemusourcesqueeze(unfixed)end-of-life
qemusourcewheezy1.1.2+dfsg-6a+deb7u12lowDSA-3469-1
qemu-kvmsource(unstable)(unfixed)low
qemu-kvmsourcesqueeze(unfixed)end-of-life
qemu-kvmsourcewheezy1.1.2+dfsg-6+deb7u12lowDSA-3470-1

Notes

[squeeze] - qemu <end-of-life> (Unsupported in squeeze-lts)
[squeeze] - qemu-kvm <end-of-life> (Unsupported in squeeze-lts)
https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg02812.html
https://bugzilla.redhat.com/show_bug.cgi?id=1283934
http://www.openwall.com/lists/oss-security/2016/01/16/1
Possibly introduced in http://git.qemu.org/?p=qemu.git;a=commit;h=4917cf44326a1bda2fd7f27303aff7a25ad86518 (v1.6.0-rc0)
kvmapic introduced after 1.0.50 (http://git.qemu.org/?p=qemu.git;a=commit;h=e5ad936b0fd7dfd7fd7908be6f9f1ca88f63b96b)

Search for package or bug name: Reporting problems