Debian LTS Advisory ([SECURITY] [DLA 1611-1 and DLA 1611-2] libav security update)

Published: 2018-12-20 23:00:00
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:P

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

Affected Versions:
libav on Debian Linux

Recommendations:
For Debian 8 'Jessie', these problems have been fixed in version 6:11.12-1~deb8u3. We recommend that you upgrade your libav Linux Distribution Packages.

Summary:
DLA 1611-1: Several security issues have been corrected in multiple demuxers and decoders of the libav multimedia library. CVE-2014-9317 The decode_ihdr_chunk function in libavcodec/pngdec.c allowed remote attackers to cause a denial of service (out-of-bounds heap access) and possibly had other unspecified impact via an IDAT before an IHDR in a PNG file. The issue got addressed by checking IHDR/IDAT order. CVE-2015-6761 The update_dimensions function in libavcodec/vp8.c in libav relies on a coefficient-partition count during multi-threaded operation, which allowed remote attackers to cause a denial of service (race condition and memory corruption) or possibly have unspecified other impact via a crafted WebM file. This issue has been resolved by using num_coeff_partitions in thread/buffer setup. The variable is not a constant and can lead to race conditions. CVE-2015-6818 The decode_ihdr_chunk function in libavcodec/pngdec.c did not enforce uniqueness of the IHDR (aka image header) chunk in a PNG image, which allowed remote attackers to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact via a crafted image with two or more of these chunks. This has now been fixed by only allowing one IHDR chunk. Multiple IHDR chunks are forbidden in PNG. Description truncated. Please see the references for more information.

Detection Method:
This check tests the installed software version using the apt Linux Distribution Package manager.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2014-9317
https://nvd.nist.gov/vuln/detail/CVE-2015-6761
https://nvd.nist.gov/vuln/detail/CVE-2015-6818
https://nvd.nist.gov/vuln/detail/CVE-2015-6820
https://nvd.nist.gov/vuln/detail/CVE-2015-6821
https://nvd.nist.gov/vuln/detail/CVE-2015-6822
https://nvd.nist.gov/vuln/detail/CVE-2015-6823
https://nvd.nist.gov/vuln/detail/CVE-2015-6824
https://nvd.nist.gov/vuln/detail/CVE-2015-6825
https://nvd.nist.gov/vuln/detail/CVE-2015-6826
https://nvd.nist.gov/vuln/detail/CVE-2015-8216
https://nvd.nist.gov/vuln/detail/CVE-2015-8217
https://nvd.nist.gov/vuln/detail/CVE-2015-8363
https://nvd.nist.gov/vuln/detail/CVE-2015-8364
https://nvd.nist.gov/vuln/detail/CVE-2015-8661
https://nvd.nist.gov/vuln/detail/CVE-2015-8662
https://nvd.nist.gov/vuln/detail/CVE-2015-8663
https://nvd.nist.gov/vuln/detail/CVE-2016-10190
https://nvd.nist.gov/vuln/detail/CVE-2016-10191

References:

https://lists.debian.org/debian-lts-announce/2018/12/msg00009.html
https://lists.debian.org/debian-lts-announce/2018/12/msg00010.html

Severity
High
CVSS Score
7.5
Published
2018-12-20
Modified
2019-03-18
Category
Debian Local Security Checks

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