DSA-4213-1

CVE-2017-15268 CVE-2017-15289 CVE-2017-16845 CVE-2017-17381 CVE-2017-18043 CVE-2018-5683 CVE-2018-7550 Debian Bug : 877890 880832 880836 882136 883399 883625 884806 886532 887392 892041

Several vulnerabilities were discovered in qemu, a fast processor emulator.

CVE-2017-15038

Tuomas Tynkkynen discovered an information leak in 9pfs.

CVE-2017-15119

Eric Blake discovered that the NBD server insufficiently restricts
large option requests, resulting in denial of service.

CVE-2017-15124

Daniel Berrange discovered that the integrated VNC server
insufficiently restricted memory allocation, which could result in
denial of service.

CVE-2017-15268

A memory leak in websockets support may result in denial of service.

CVE-2017-15289

Guoxiang Niu discovered an OOB write in the emulated Cirrus graphics
adaptor which could result in denial of service.

CVE-2017-16845

Cyrille Chatras discovered an information leak in PS/2 mouse and
keyboard emulation which could be exploited during instance
migration.

CVE-2017-17381

Dengzhan Heyuandong Bijunhua and Liweichao discovered that an
implementation error in the virtio vring implementation could result
in denial of service.

CVE-2017-18043

Eric Blake discovered an integer overflow in an internally used
macro which could result in denial of service.

CVE-2018-5683

Jiang Xin and Lin ZheCheng discovered an OOB memory access in the
emulated VGA adaptor which could result in denial of service.

CVE-2018-7550

Cyrille Chatras discovered that an OOB memory write when using
multiboot could result in the execution of arbitrary code.

This update also backports a number of mitigations against the Spectre v2 vulnerability affecting modern CPUs (CVE-2017-5715). For additional information please refer to https://www.qemu.org/2018/01/04/spectre/