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Arch Linux Security Advisory ASA-201701-3
========================================
Severity: High
Date    : 2017-01-02
CVE-ID  : CVE-2016-9445 CVE-2016-9446
Package : gst-plugins-bad
Type    : multiple issues
Remote  : Yes
Link    : https://security.archlinux.org/AVG-76

Summary
======
The package gst-plugins-bad before version 1.10.2-2 is vulnerable to
multiple issues including arbitrary code execution and information
disclosure.

Resolution
=========
Upgrade to 1.10.2-2.

# pacman -Syu "gst-plugins-bad>=1.10.2-2"

The problems have been fixed upstream in version 1.10.2.

Workaround
=========
None

Description
==========
- CVE-2016-9445 (arbitrary code execution)

The vmnc decoder in gst-plugins-bad of the gstreamer code base contains
a width * height * depth integer overflow in the allocation of the
render buffer inside gst/vmnc/vmncdec.c.

- CVE-2016-9446 (information disclosure)

An information disclosure vulnerability has been discovered in the
render canvas functionality of gst-plugins-bad due to the lack of
initializing the returned heap area of g_malloc(). An example for the
information leak would be thumbnailing a simple 1 frame vmnc movie that
does not draw to the allocated render canvas at all.
This could be a problem for anyone using gstreamer in a server
environment to provide a thumbnailing services.

Impact
=====
An attacker is able to provide a crafted VMNC file that would allow for
either arbitrary code execution or disclose information of the memory
of the running host.

References
=========
https://www.openwall.com/lists/oss-security/2016/11/18/13
https://scarybeastsecurity.blogspot.com/2016/11/0day-poc-risky-design-decisions-in.html
https://cgit.freedesktop.org/gstreamer/gst-plugins-bad/commit/gst/vmnc/vmncdec.c?id=4cb1bcf1422bbcd79c0f683edb7ee85e3f7a31fe
https://bugzilla.gnome.org/show_bug.cgi?id=774533
https://security.archlinux.org/CVE-2016-9445
https://security.archlinux.org/CVE-2016-9446

ArchLinux: 201701-3: gst-plugins-bad: multiple issues

January 2, 2017

Summary

- CVE-2016-9445 (arbitrary code execution) The vmnc decoder in gst-plugins-bad of the gstreamer code base contains a width * height * depth integer overflow in the allocation of the render buffer inside gst/vmnc/vmncdec.c.
- CVE-2016-9446 (information disclosure)
An information disclosure vulnerability has been discovered in the render canvas functionality of gst-plugins-bad due to the lack of initializing the returned heap area of g_malloc(). An example for the information leak would be thumbnailing a simple 1 frame vmnc movie that does not draw to the allocated render canvas at all. This could be a problem for anyone using gstreamer in a server environment to provide a thumbnailing services.

Resolution

Upgrade to 1.10.2-2. # pacman -Syu "gst-plugins-bad>=1.10.2-2"
The problems have been fixed upstream in version 1.10.2.

References

https://www.openwall.com/lists/oss-security/2016/11/18/13 https://scarybeastsecurity.blogspot.com/2016/11/0day-poc-risky-design-decisions-in.html https://cgit.freedesktop.org/gstreamer/gst-plugins-bad/commit/gst/vmnc/vmncdec.c?id=4cb1bcf1422bbcd79c0f683edb7ee85e3f7a31fe https://bugzilla.gnome.org/show_bug.cgi?id=774533 https://security.archlinux.org/CVE-2016-9445 https://security.archlinux.org/CVE-2016-9446

Severity
Package : gst-plugins-bad
Type : multiple issues
Remote : Yes
Link : https://security.archlinux.org/AVG-76

Workaround

None

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