Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Title Opus: User-assisted execution of arbitrary code
Informations
Name GLSA-201702-21 First vendor Publication 2017-02-20
Vendor Gentoo Last vendor Modification 2017-02-20
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 9.3 Attack Range Network
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

A vulnerability in Opus could cause memory corruption.

Background

Opus is a totally open, royalty-free, highly versatile audio codec.

Description

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.

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.

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 https://git.xiph.org/?p=opus.git;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

Original Source

Url : http://security.gentoo.org/glsa/glsa-201702-21.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-190 Integer Overflow or Wraparound (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 10

Nessus® Vulnerability Scanner

Date Description
2017-10-03 Name : The remote host is missing a macOS update that fixes multiple security vulner...
File : macos_10_13.nasl - Type : ACT_GATHER_INFO
2017-02-21 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201702-21.nasl - Type : ACT_GATHER_INFO
2017-02-21 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2017-277.nasl - Type : ACT_GATHER_INFO
2017-02-10 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0436-1.nasl - Type : ACT_GATHER_INFO
2017-01-23 Name : The remote Debian host is missing a security update.
File : debian_DLA-793.nasl - Type : ACT_GATHER_INFO
2017-01-23 Name : The remote Fedora host is missing a security update.
File : fedora_2017-0bf77c4b1b.nasl - Type : ACT_GATHER_INFO
2017-01-23 Name : The remote Fedora host is missing a security update.
File : fedora_2017-0d9bdbd9dd.nasl - Type : ACT_GATHER_INFO

Alert History

If you want to see full details history, please login or register.
0
1
Date Informations
2017-02-22 13:21:09
  • Multiple Updates
2017-02-21 05:18:58
  • First insertion