[DLA 720-1] xen security update

Package : xen
Version : 4.1.6.lts1-4
CVE ID : CVE-2016-9379 CVE-2016-9380 CVE-2016-9381 CVE-2016-9382
CVE-2016-9383 CVE-2016-9386

Multiple vulnerabilities have been discovered in the Xen hypervisor. The
Common Vulnerabilities and Exposures project identifies the following
problems:

CVE-2016-9379, CVE-2016-9380 (XSA-198)

pygrub, the boot loader emulator, fails to quote (or sanity check)
its results when reporting them to its caller. A malicious guest
administrator can obtain the contents of sensitive host files

CVE-2016-9381 (XSA-197)

The compiler can emit optimizations in qemu which can lead to double
fetch vulnerabilities. Malicious administrators can exploit this
vulnerability to take over the qemu process, elevating its privilege
to that of the qemu process.

CVE-2016-9382 (XSA-192)

LDTR, just like TR, is purely a protected mode facility. Hence even
when switching to a VM86 mode task, LDTR loading needs to follow
protected mode semantics. A malicious unprivileged guest process
can crash or escalate its privilege to that of the guest operating
system.

CVE-2016-9383 (XSA-195)

When Xen needs to emulate some instruction, to efficiently handle
the emulation, the memory address and register operand are
recalculated internally to Xen. In this process, the high bits of
an intermediate expression were discarded, leading to both the
memory location and the register operand being wrong. A malicious
guest can modify arbitrary memory.

CVE-2016-9386 (XSA-191)

The Xen x86 emulator erroneously failed to consider the unusability
of segments when performing memory accesses. An unprivileged guest
user program may be able to elevate its privilege to that of the
guest operating system.

For Debian 7 "Wheezy", these problems have been fixed in version
4.1.6.lts1-4. For Debian 8 "Jessie", these problems will be fixed shortly.

We recommend that you upgrade your xen packages.

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

[DSA 3723-1] gst-plugins-good1.0 security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-3723-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
November 24, 2016 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : gst-plugins-good1.0
CVE ID : CVE-2016-9634 CVE-2016-9635 CVE-2016-9636
Debian Bug : 845375

Chris Evans discovered that the GStreamer 1.0 plugin used to decode
files in the FLIC format allowed execution of arbitrary code. Further
details can be found in his advisory at
https://scarybeastsecurity.blogspot.de/2016/11/0day-exploit-advancing-exploitation.html

For the stable distribution (jessie), these problems have been fixed in
version 1.4.4-2+deb8u2.

For the unstable distribution (sid), these problems have been fixed in
version 1.10.1-2.

We recommend that you upgrade your gst-plugins-good1.0 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/

[DSA 3724-1] gst-plugins-good0.10 security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-3724-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
November 24, 2016 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : gst-plugins-good0.10
CVE ID : CVE-2016-9634 CVE-2016-9635 CVE-2016-9636

Chris Evans discovered that the GStreamer 0.10 plugin used to decode
files in the FLIC format allowed execution of arbitrary code. Further
details can be found in his advisory at
https://scarybeastsecurity.blogspot.de/2016/11/0day-exploit-advancing-exploitation.html

This update removes the insecure FLIC file format plugin.

For the stable distribution (jessie), these problems have been fixed in
version 0.10.31-3+nmu4+deb8u2.

We recommend that you upgrade your gst-plugins-good0.10 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/