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AUSCERT External Security Bulletin Redistribution
libav security update
1 April 2019
AusCERT Security Bulletin Summary
Operating System: Debian GNU/Linux 8
Impact/Access: Denial of Service -- Remote with User Interaction
CVE Names: CVE-2018-1999012 CVE-2018-6392 CVE-2018-639
CVE-2017-1000460 CVE-2017-14058 CVE-2015-1872
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Package : libav
Version : 6:11.12-1~deb8u6
CVE ID : CVE-2015-1872 CVE-2017-14058 CVE-2017-1000460 CVE-2018-639
Debian Bug : 20
Several security issues have been corrected in multiple demuxers and
decoders of the libav multimedia library.
The ff_mjpeg_decode_sof function in libavcodec/mjpegdec.c did not
validate the number of components in a JPEG-LS Start Of Frame
segment, which allowed remote attackers to cause a denial of service
(out-of-bounds array access) or possibly have unspecified other
impact via crafted Motion JPEG data.
The read_data function in libavformat/hls.c did not restrict reload
attempts for an insufficient list, which allowed remote attackers to
cause a denial of service (infinite loop).
In get_last_needed_nal() (libavformat/h264.c) the return value of
init_get_bits was ignored and get_ue_golomb(&gb) was called on an
uninitialized get_bits context, which caused a NULL deref exception.
The filter_slice function in libavfilter/vf_transpose.c allowed
remote attackers to cause a denial of service (out-of-array access)
via a crafted MP4 file.
libav contained a CWE-835: Infinite loop vulnerability in pva format
demuxer that could result in a vulnerability that allowed attackers to
consume excessive amount of resources like CPU and RAM. This attack
appeared to be exploitable via specially crafted PVA file had to be
provided as input.
For Debian 8 "Jessie", these problems have been fixed in version
We recommend that you upgrade your libav 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
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