Buffer overflow in FFmpeg - CVE-2021-30123

Vulnerability identifier: #VU53602

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-2021-30123

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing media content in libavcodec/aacdec_template.c. A remote attacker can create a specially crafted media file, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable 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 4.4
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

• http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=d6f293353c94c7ce200f6e0975ae3de49787f91f
• https://trac.ffmpeg.org/ticket/8863
• https://trac.ffmpeg.org/ticket/8845
• https://security.gentoo.org/glsa/202105-24

• Remote code execution in FFmpeg
• Gentoo update for FFmpeg
• Multiple vulnerabilities in Dell ThinOS