May 29, 2024 · Applied Cybernetics Group
CVE-2024-4978 — Justice AV Solutions Viewer
Justice AV Solutions (JAVS) Viewer Installer Embedded Malicious Code Vulnerability
- Added to KEV
2024-05-29- Federal due date
2024-06-19- Vendor
- Justice AV Solutions
- Product
- Viewer
- EPSS
- 97.8th percentile (score 0.269, as of
2026-07-13) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- ATT&CK
- T1005 , T1071.001 , T1105 , T1195.002 · signal rollup
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2024-4978
CISA short description
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.
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.