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Debian Security Advisory DSA-4213-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
May 29, 2018                          https://www.debian.org/security/faq
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Package        : qemu
CVE ID         : CVE-2017-5715 CVE-2017-15038 CVE-2017-15119 CVE-2017-15124
                 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/

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/source-package/qemu

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org