ESB-2019.1067 - [Debian] libav: Denial of service - Remote with user interaction 2019-04-01

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.1067
                           libav security update
                               1 April 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           libav
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
Impact/Access:     Denial of Service -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-1999012 CVE-2018-6392 CVE-2018-639
                   CVE-2017-1000460 CVE-2017-14058 CVE-2015-1872

Reference:         ESB-2018.2075

Original Bulletin: 
   https://lists.debian.org/debian-lts-announce/2019/03/msg00041.html

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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
2=20
                 CVE-2018-1999012
Debian Bug     : 20


Several security issues have been corrected in multiple demuxers and
decoders of the libav multimedia library.

CVE-2015-1872

    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.

CVE-2017-14058

    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).

CVE-2017-1000460

    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.

CVE-2018-6392

    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.

CVE-2018-1999012

    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
6:11.12-1~deb8u6.

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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