CVE-2016-9916

NameCVE-2016-9916
DescriptionMemory leak in hw/9pfs/9p-proxy.c in QEMU (aka Quick Emulator) allows local privileged guest OS users to cause a denial of service (host memory consumption and possibly QEMU process crash) by leveraging a missing cleanup operation in the proxy backend.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-1497-1
NVD severitymedium (attack range: local)
Debian Bugs847496

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
qemu (PTS)jessie1:2.1+dfsg-12+deb8u6vulnerable
jessie (security)1:2.1+dfsg-12+deb8u7fixed
stretch (security), stretch1:2.8+dfsg-6+deb9u4fixed
buster, sid1:2.12+dfsg-3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qemusource(unstable)1:2.8+dfsg-1medium847496
qemusourcejessie1:2.1+dfsg-12+deb8u7mediumDLA-1497-1
qemu-kvmsource(unstable)(unfixed)medium

Notes

[wheezy] - qemu <no-dsa> (Minor issue, virtfs-proxy-helper not present)
[wheezy] - qemu-kvm <no-dsa> (Minor issue, virtfs-proxy-helper not present)
https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg03278.html
Fixed by: http://git.qemu.org/?p=qemu.git;a=commit;h=898ae90a44551d25b8e956fd87372d303c82fe68 (v2.8.0-rc2)
Proxy filesystem driver introduced in: http://git.qemu.org/?p=qemu.git;a=commit;h=4c793dda22213a7aba8e4d9a814e8f368a5f8bf7 (v1.0-rc0)
http://www.openwall.com/lists/oss-security/2016/12/06/11

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