SB2017062834 - Multiple vulnerabilities in Libav

Description

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error (CVE-ID: CVE-2017-11684)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

There is an illegal address access in the build_table function in libavcodec/bitstream.c of Libav 12.1 that will lead to remote denial of service via crafted input.

2) Buffer overflow (CVE-ID: CVE-2017-9987)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

There is a heap-based buffer overflow in the function hpel_motion in mpegvideo_motion.c in libav 12.1. A crafted input can lead to a remote denial of service attack.

Remediation

Install update from vendor's website.

References

• http://www.securityfocus.com/bid/99980
• https://bugzilla.libav.org/show_bug.cgi?id=1073
• https://bugzilla.libav.org/show_bug.cgi?id=1067
• https://lists.debian.org/debian-lts-announce/2019/09/msg00000.html