CVE-2019-12730

aa_read_header in libavformat/aadec.c in FFmpeg before 3.2.14 and 4.x before 4.1.4 does not check for sscanf failure and consequently allows use of uninitialized variables.

aa_read_header in libavformat/aadec.c in FFmpeg before 3.2.14 and 4.x before 4.1.4 does not check for sscanf failure and consequently allows use of uninitialized variables.

This update for ffmpeg fixes the following issues:

Security issues fixed:

• CVE-2019-17542: Fixed a heap-buffer overflow in vqa_decode_chunk due to an out-of-array access (bsc#1154064).
• CVE-2019-12730: Fixed an uninitialized use of variables due to an improper check (bsc#1137526).
• CVE-2019-9718: Fixed a denial of service in the subtitle decode (bsc#1129715).
• CVE-2018-13301: Fixed a denial of service while converting a crafted AVI file to MPEG4 (bsc#1100352).

This update for ffmpeg fixes the following issues:

Security issues fixed:

• CVE-2019-17542: Fixed a heap-buffer overflow in vqa_decode_chunk due to an out-of-array access (bsc#1154064).
• CVE-2019-12730: Fixed an uninitialized use of variables due to an improper check (bsc#1137526).
• CVE-2019-9718: Fixed a denial of service in the subtitle decode (bsc#1129715).
• CVE-2018-13301: Fixed a denial of service while converting a crafted AVI file to MPEG4 (bsc#1100352).

It was discovered that FFmpeg incorrectly verified empty audio packets or HEVC data. An attacker could possibly use this issue to cause a denial of service via a crafted file. This issue only affected Ubuntu 16.04 LTS, as it was already fixed in Ubuntu 18.04 LTS. For more information see: https://usn.ubuntu.com/usn/usn-3967-1 (CVE-2018-15822, CVE-2019-11338)

It was discovered that FFmpeg incorrectly handled sscanf failures. An attacker could possibly use this issue to cause a denial of service or other unspecified impact. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-12730)

It was discovered that FFmpeg incorrectly handled certain WEBM files. An attacker could possibly use this issue to obtain sensitive data or other unspecified impact. This issue only affected Ubuntu 20.04 LTS. (CVE-2019-13312)

It was discovered that FFmpeg incorrectly handled certain AVI files. An attacker could possibly use this issue to cause a denial of service or other unspecified impact. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-13390)

It was discovered that FFmpeg incorrectly handled certain input. An attacker could possibly use this issue to cause a denial of service or other unspecified impact. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-17539)

It was discovered that FFmpeg incorrectly handled certain input during decoding of VQA files. An attacker could possibly use this issue to obtain sensitive information or other unspecified impact. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-17542)

It was discovered that FFmpeg incorrectly handled certain JPEG files. An attacker could possibly use this issue to obtain sensitive information or other unspecified impact. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-12284)

It was discovered that FFmpeg incorrectly handled certain M3U8 files. An attacker could possibly use this issue to obtain sensitive information or other unspecified impact. (CVE-2020-13904)