CVE-2024-4978 — Justice AV Solutions (JAVS) Viewer Installer Embedded Malicious Code Vulnerability

Overview

Justice AV Solutions (JAVS) Viewer installer contains a malicious version of ffmpeg.exe, named fffmpeg.exe (SHA256: 421a4ad2615941b177b6ec4ab5e239c14e62af2ab07c6df1741e2a62223223c4). When run, this creates a backdoor connection to a malicious C2 server.

Vulnerability details

CVE ID

CVE-2024-4978

Vulnerability

Justice AV Solutions (JAVS) Viewer Installer Embedded Malicious Code Vulnerability

Vendor

Justice AV Solutions

Affected products

Justice AV Solutions: Viewer

Severity

HIGH

Exploitation status

Actively exploited in the wild (CISA KEV)

Published

2024-05-29

Remediation guidance

CVE-2024-4978 is in CISA's Known Exploited Vulnerabilities (KEV) catalog — U.S. federal civilian agencies are required to remediate it under Binding Operational Directive 22-01. Treat it as a priority for every environment.

Apply the vendor's official security update for Justice AV Solutions the affected product as soon as possible. Where a patch is unavailable, apply vendor mitigations or isolate/segment exposed systems.

Hunt for indicators of compromise tied to this vulnerability and confirm logging/EDR coverage on affected assets.

Authoritative references

• NVD — National Vulnerability Database
• MITRE CVE Record
• CISA Known Exploited Vulnerabilities Catalog
• FIRST EPSS — Exploit Prediction Scoring