Improper validation of array index in FFmpeg - CVE-2021-33815

Vulnerability identifier: #VU84800

CSH Severity: High

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-33815

CWE-ID: CWE-129

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to an out-of-bounds array access within the dwa_uncompress() function in libavcodec/exr.c. A remote attacker can trick the victim to open a specially crafted image, trigger memory corruption and execute arbitrary code on the system.

FFmpeg
Gentoo Linux
Telemetry Dashboard
Liquidware
Citrix Workspace App
Webex App VDI
Cisco Jabber
Cisco Webex Meetings
VMware Horizon Client

Install updates from vendor's website.

FFmpeg - update to 5.0
Telemetry Dashboard - update to 1.1.0.6 on Thin OS 2405
Liquidware - update to 6.7.0.2.2 on Thin OS 2405
Cisco Jabber - update to 14.3.0.308378.11 on Thin OS 2405
Citrix Workspace App - update to 24.2.0.65.17 on Thin OS 2405
Webex App VDI - update to 44.2.0.28744.1 on Thin OS 2405
Cisco Webex Meetings - update to 44.2.0.76.2 on Thin OS 2405
VMware Horizon Client - update to 2312.1.8.12.1.5 on Thin OS 2405

• https://github.com/FFmpeg/FFmpeg/commit/26d3c81bc5ef2f8c3f09d45eaeacfb4b1139a777
• https://security.gentoo.org/glsa/202312-14

• Multiple vulnerabilities in FFmpeg
• Gentoo update for FFmpeg
• Multiple vulnerabilities in Dell ThinOS