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CVE-2016-8578

Published: 4 November 2016

The v9fs_iov_vunmarshal function in fsdev/9p-iov-marshal.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) by sending an empty string parameter to a 9P operation.

Notes

AuthorNote
tyhicks
Privileged user inside the guest can trigger a DoS of the QEMU host
process
In Trusty and Xenial, the vulnerable code is in the v9fs_unmarshal()
function of fsdev/virtio-9p-marshal.c

Priority

Low

CVSS 3 base score: 6.0

Status

Package Release Status
qemu-kvm
Launchpad, Ubuntu, Debian
upstream Needs triage

precise Not vulnerable
(code not present)
trusty Does not exist

xenial Does not exist

yakkety Does not exist

qemu
Launchpad, Ubuntu, Debian
upstream Needed

precise Does not exist

trusty
Released (2.0.0+dfsg-2ubuntu1.30)
xenial
Released (1:2.5+dfsg-5ubuntu10.6)
yakkety
Released (1:2.6.1+dfsg-0ubuntu5.1)
Patches:
upstream: http://git.qemu.org/?p=qemu.git;a=commit;h=ba42ebb863ab7d40adc79298422ed9596df8f73a