CVE-2024-4978
Published: May 29, 2024
Official 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.
CISA KEV Advisory
Justice AV Solutions (JAVS) Viewer Installer Embedded Malicious Code Vulnerability
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.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Risk Analysis
The Justice AV Solutions (JAVS) Viewer installer contains a malicious version of ffmpeg.exe that creates a backdoor connection to a command-and-control server. This is a critical supply chain attack that can lead to full system compromise. Its high severity and confirmed exploitation in the wild, along with an EPSS score of 0.14148, demand immediate attention.
This vulnerability is actively exploited in the wild and is included in CISA's KEV catalog. It creates a backdoor connection to a malicious C2 server upon execution.
Immediately remove and reinstall Justice AV Solutions (JAVS) Viewer from a trusted source, ensuring the malicious ffmpeg.exe is not present. Implement robust endpoint detection and response (EDR) solutions to detect and prevent such supply chain attacks.
Technical Analysis
CVE-2024-4978 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2024-4978 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2024-4978 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1