[IT-SecNots] [SECURITY] [DSA 3284-1] qemu security update

[Salvatore Bonaccorso <carnil AT debian.org>]

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Debian Security Advisory DSA-3284-1                   security AT debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
June 13, 2015                         https://www.debian.org/security/faq
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Package        : qemu
CVE ID         : CVE-2015-3209 CVE-2015-4037 CVE-2015-4103 CVE-2015-4104
                 CVE-2015-4105 CVE-2015-4106
Debian Bug     : 787547 788460

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

CVE-2015-3209

    Matt Tait of Google's Project Zero security team discovered a flaw
    in the way QEMU's AMD PCnet Ethernet emulation handles multi-TMD
    packets with a length above 4096 bytes. A privileged guest user in a
    guest with an AMD PCNet ethernet card enabled can potentially use
    this flaw to execute arbitrary code on the host with the privileges
    of the hosting QEMU process.

CVE-2015-4037

    Kurt Seifried of Red Hat Product Security discovered that QEMU's
    user mode networking stack uses predictable temporary file names
    when the -smb option is used. An unprivileged user can use this flaw
    to cause a denial of service.

CVE-2015-4103

    Jan Beulich of SUSE discovered that the QEMU Xen code does not
    properly restrict write access to the host MSI message data field,
    allowing a malicious guest to cause a denial of service.

CVE-2015-4104

    Jan Beulich of SUSE discovered that the QEMU Xen code does not
    properly restrict access to PCI MSI mask bits, allowing a malicious
    guest to cause a denial of service.

CVE-2015-4105

    Jan Beulich of SUSE reported that the QEMU Xen code enables
    logging for PCI MSI-X pass-through error messages, allowing a
    malicious guest to cause a denial of service.

CVE-2015-4106

    Jan Beulich of SUSE discovered that the QEMU Xen code does not
    properly restrict write access to the PCI config space for certain
    PCI pass-through devices, allowing a malicious guest to cause a
    denial of service, obtain sensitive information or potentially
    execute arbitrary code.

For the oldstable distribution (wheezy), these problems have been fixed
in version 1.1.2+dfsg-6a+deb7u8. Only CVE-2015-3209 and CVE-2015-4037
affect oldstable.

For the stable distribution (jessie), these problems have been fixed in
version 1:2.1+dfsg-12+deb8u1.

For the unstable distribution (sid), these problems have been fixed in
version 1:2.3+dfsg-6.

We recommend that you upgrade your qemu packages.

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 AT lists.debian.org
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