CVE-2020-20892

An issue was discovered in function filter_frame in libavfilter/vf_lenscorrection.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts due to a division by zero.

This update for ffmpeg fixes the following issues:

• CVE-2021-3566: Fixed information leak (bsc#1189166).
• CVE-2021-38093: Fixed integer overflow vulnerability in filter_robert() (bsc#1190734)
• CVE-2021-38092: Fixed integer overflow vulnerability in filter_prewitt() (bsc#1190733)
• CVE-2021-38094: Fixed integer overflow vulnerability in filter_sobel() (bsc#1190735)
• CVE-2020-22037: Fixed denial of service vulnerability caused by memory leak in avcodec_alloc_context3() (bsc#1186756)
• CVE-2020-35965: Fixed out-of-bounds write in decode_frame() (bsc#1187852)
• CVE-2020-20892: Fixed an issue with filter_frame() (bsc#1190719)
• CVE-2020-20891: Fixed a buffer overflow vulnerability in config_input() (bsc#1190718)
• CVE-2020-20895: Fixed a buffer overflow vulnerability in function filter_vertically_##name (bsc#1190722)
• CVE-2020-20896: Fixed an issue with latm_write_packet() (bsc#1190723)
• CVE-2020-20899: Fixed a buffer overflow vulnerability in config_props() (bsc#1190726)
• CVE-2020-20902: Fixed an out-of-bounds read vulnerabilit long_term_filter() (bsc#1190729)

This update for ffmpeg fixes the following issues:

• CVE-2021-3566: Fixed information leak (bsc#1189166).
• CVE-2021-38093: Fixed integer overflow vulnerability in filter_robert() (bsc#1190734)
• CVE-2021-38092: Fixed integer overflow vulnerability in filter_prewitt() (bsc#1190733)
• CVE-2021-38094: Fixed integer overflow vulnerability in filter_sobel() (bsc#1190735)
• CVE-2020-22037: Fixed denial of service vulnerability caused by memory leak in avcodec_alloc_context3() (bsc#1186756)
• CVE-2020-35965: Fixed out-of-bounds write in decode_frame() (bsc#1187852)
• CVE-2020-20892: Fixed an issue with filter_frame() (bsc#1190719)
• CVE-2020-20891: Fixed a buffer overflow vulnerability in config_input() (bsc#1190718)
• CVE-2020-20895: Fixed a buffer overflow vulnerability in function filter_vertically_##name (bsc#1190722)
• CVE-2020-20896: Fixed an issue with latm_write_packet() (bsc#1190723)
• CVE-2020-20899: Fixed a buffer overflow vulnerability in config_props() (bsc#1190726)
• CVE-2020-20902: Fixed an out-of-bounds read vulnerabilit long_term_filter() (bsc#1190729)

This update for ffmpeg fixes the following issues:

• CVE-2022-3109: Fixed null pointer dereference in vp3_decode_frame() (bsc#1206442).
• CVE-2020-22042: Fixed a denial of service vulnerability led by a memory leak in the link_filter_inouts function in libavfilter/graphparser.c. (bsc#1186761)
• CVE-2021-38094: Fixed an integer overflow vulnerability in function filter_sobel in libavfilter/vf_convolution.c (bsc#1190735).
• CVE-2021-38093: Fixed an integer Overflow vulnerability in function filter_robert in libavfilter/vf_convolution.c (bsc#1190734).
• CVE-2021-38092: Fixed an Integer Overflow vulnerability in function filter_prewitt in libavfilter/vf_convolution.c (bsc#1190733).
• CVE-2020-22037: Fixed a denial of service vulnerability due to a memory leak in avcodec_alloc_context3 at options.c (bsc#1186756).
• CVE-2021-3566: Fixed an exposure of sensitive information on ffmpeg version prior to 4.3 (bsc#1189166).
• CVE-2020-35965: Fixed an out-of-bounds write in decode_frame in libavcodec/exr.c (bsc#1187852).
• CVE-2020-20892: Fixed a division by zero in function filter_frame in libavfilter/vf_lenscorrection.c (bsc#1190719).
• CVE-2020-20891: Fixed a buffer overflow vulnerability in function config_input in libavfilter/vf_gblur.c (bsc#1190718).
• CVE-2020-20895: Fixed a buffer overflow vulnerability in function filter_vertically_##name in libavfilter/vf_avgblur.c (bsc#1190722).
• CVE-2020-20896: Fixed a NULL pointer dereference in function latm_write_packet in libavformat/latmenc.c (bsc#1190723).
• CVE-2020-20899: Fixed a buffer overflow vulnerability in function config_props in libavfilter/vf_bwdif.c (bsc#1190726).
• CVE-2020-20902: Fixed an out-of-bounds read vulnerability in long_term_filter function in g729postfilter.c (bsc#1190729).

It was discovered that FFmpeg did not properly verify certain input when processing video and audio files. An attacker could possibly use this to send specially crafted input to the application, force a division by zero, and cause a denial of service (application crash). (CVE-2020-20445, CVE-2020-20446, CVE-2020-20453, CVE-2020-20892)

It was discovered that FFmpeg did not properly perform certain bit shift and memory operations. An attacker could possibly use this issue to expose sensitive information. (CVE-2020-20902)

It was discovered that FFmpeg did not properly perform memory management operations in various of its functions. An attacker could possibly use this issue to send specially crafted input to the application and cause a denial of service (application crash) or execute arbitrary code. (CVE-2020-21041, CVE-2020-20451, CVE-2020-21688, CVE-2020-21697, CVE-2020-22020, CVE-2020-22021, CVE-2020-22022, CVE-2020-22025, CVE-2020-22031, CVE-2020-22032, CVE-2020-22037, CVE-2020-22040, CVE-2020-22041, CVE-2020-22042, CVE-2020-22044)

It was discovered that FFmpeg did not properly perform memory management operations in various of its functions. An attacker could possibly use this issue to send specially crafted input to the application and cause a denial of service (application crash) or execute arbitrary code. (CVE-2020-22016, CVE-2020-22046, CVE-2020-22049, CVE-2020-22054)

It was discovered that FFmpeg did not properly perform memory management operations in various of its functions. An attacker could possibly use this issue to send specially crafted input to the application and cause a denial of service (application crash) or execute arbitrary code. (CVE-2020-35965)

It was discovered that FFmpeg did not properly handle data assigned to the tty demuxer. An attacker could possibly use this issue to send specially crafted input to the application and expose sensitive information. (CVE-2021-3566)

It was discovered that FFmpeg did not perform checks on function return values when encoding and formatting input video and audio files. An attacker could possibly use this issue to cause a denial of service (application crash) or execute arbitrary code. (CVE-2021-38114, CVE-2021-38171)

It was discovered that FFmpeg did not properly sanitize function returned data when calculating frame duration values. An attacker could possibly use this issue to cause an assertion failure and then cause a denial of service (application crash). (CVE-2021-38291)