Debian Security Advisory
DLA-1654-1 libav -- LTS security update
- Date Reported:
- 06 Feb 2019
- Affected Packages:
- Security database references:
- In Mitre's CVE dictionary: CVE-2014-8542, CVE-2015-1207, CVE-2017-7863, CVE-2017-7865, CVE-2017-14169, CVE-2017-14223.
- More information:
Several security issues have been corrected in multiple demuxers and decoders of the libav multimedia library.
libavcodec/utils.c omitted a certain codec ID during enforcement of alignment, which allowed remote attackers to cause a denial of ervice (out-of-bounds access) or possibly have unspecified other impact via crafted JV data.
Double-free vulnerability in libavformat/mov.c allowed remote attackers to cause a denial of service (memory corruption and crash) via a crafted .m4a file.
libav had an out-of-bounds write caused by a heap-based buffer overflow related to the decode_frame_common function in libavcodec/pngdec.c.
libav had an out-of-bounds write caused by a heap-based buffer overflow related to the ipvideo_decode_block_opcode_0xA function in libavcodec/interplayvideo.c and the avcodec_align_dimensions2 function in libavcodec/utils.c.
In the mxf_read_primer_pack function in libavformat/mxfdec.c in, an integer signedness error might have occured when a crafted file, claiming a large
item_numfield such as 0xffffffff, was provided. As a result, the variable
item_numturned negative, bypassing the check for a large value.
In libavformat/asfdec_f.c a DoS in asf_build_simple_index() due to lack of an EOF (End of File) check might have caused huge CPU consumption. When a crafted ASF file, claiming a large
ictfield in the header but not containing sufficient backing data, was provided, the for loop would have consumed huge CPU and memory resources, since there was no EOF check inside the loop.
For Debian 8
Jessie, these problems have been fixed in version 6:11.12-1~deb8u5.
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