7.8 - DSA-4213

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/

For the stable distribution (stretch), these problems have been fixed in version 1:2.8+dfsg-6+deb9u4.

We recommend that you upgrade your qemu packages.

For the detailed security status of qemu please refer to its security tracker page at: https://security-tracker.debian.org/tracker/qemu