Gentoo: GLSA 202308-14 Normal: WebP Image Processing Vulnerability
gentoo
February 21, 2017
A vulnerability in Opus could cause memory corruption.
Summary
A large NLSF values could cause the stabilization code in
silk/NLSF_stabilize.c to wrap-around and have the last value in
NLSF_Q15[] to be negative, close to -32768.
Under normal circumstances, the code will simply read from the wrong
table resulting in an unstable LPC filter. The filter would then go
through the LPC stabilization code at the end of silk_NLSF2A().
Ultimately, the output audio would be garbage, but no worse than with
any other harmless bad packet.
Please see the referenced upstream patch and Debian bug report below
for a detailed analysis.
However, the original report was about a successful exploitation of
Android's Mediaserver in conjunction with this vulnerability.
Topics Covered
Resolution
All Opus users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=media-libs/opus-1.1.3-r1"
References
[ 1 ] CVE-2017-0381 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-0381 [ 2 ] Debian Bug 851612 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=851612#10 [ 3 ] Upstream patch ;a=commitdiff;h=70a3d641b
Availability
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/201702-21
style>.gentoo_availability{display:block;}
Concerns
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
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Severity: Normal
Title: Opus: User-assisted execution of arbitrary code
Date: February 20, 2017
Bugs: #605894
ID: 201702-21
Topics Covered
Background
Opus is a totally open, royalty-free, highly versatile audio codec.
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Affected Packages
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 media-libs/opus < 1.1.3-r1 >= 1.1.3-r1
Impact
=====
A remote attacker could entice a user to open a specially crafted media
stream, possibly resulting in execution of arbitrary code with the
privileges of the process, or a Denial of Service condition.
Workaround
There is no known workaround at this time.
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