CVE-2024-4978 · Severity: critical · CVSS 8.4 · Exploited in the wild · Published 2024-05-29
Justice AV Solutions (JAVS) Viewer installer version 8.3.7.250-1 contains a malicious version of ffmpeg.exe (named fffmpeg.exe) that functions as a backdoor. When executed, the binary establishes a connection to a malicious command-and-control (C2) server, allowing for unauthorized PowerShell command execution.
Quick answers
Is CVE-2024-4978 exploited in the wild?
Yes. CVE-2024-4978 is known to be exploited in the wild, first recorded on 29 May 2024. Treat it as urgent.
How severe is CVE-2024-4978?
Critical severity, with a CVSS score of 8.4, published 29 May 2024.
Which products and versions are affected?
Justice AV Solutions (JAVS) Viewer Setup 8.3.7.250-1.
Is there a fix for CVE-2024-4978?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2024-4978 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2024-4978?
Check whether you run Justice Av Solutions Viewer or Justice Av Solutions Viewer. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
Justice AV Solutions (JAVS) Viewer Setup 8.3.7.250-1
Timeline
2024-05-23: disclosed: Rapid7 published a blog post regarding the backdoored software.
2024-05-29: kev added: Added to CISA's Known Exploited Vulnerabilities (KEV) Catalog.
2024-05-29: exploited: Reported as exploited in the wild.