CVEvulnerability

CVE-2024-4978

8.7 HIGH Known exploited Published 2024-05-23 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

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

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.

Added to KEV: 2024-05-29
Remediation due: 2024-06-19
Ransomware use: Unknown
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Notes: Please follow the vendor’s instructions as outlined in the public statements at https://www.rapid7.com/blog/post/2024/05/23/cve-2024-4978-backdoored-justice-av-solutions-viewer-software-used-in-apparent-supply-chain-attack#remediation and https://www.javs.com/downloads; https://nvd.nist.gov/vuln/detail/CVE-2024-4978

Status: Analyzed
Published: 2024-05-23
Last modified: 2026-06-17
Assigner: 9119a7d8-5eab-497f-8521-727c672e3725
CVSS 4.0 (9119a7d8-5eab-497f-8521-727c672e3725): 8.7 HIGH — CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 (9119a7d8-5eab-497f-8521-727c672e3725): 8.4 HIGH — CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
CVSS 3.1 ([email protected]): 8.4 HIGH — CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
Weaknesses: CWE-506

Description

Justice AV Solutions Viewer Setup 8.3.7.250-1 contains a malicious binary when executed and is signed with an unexpected authenticode signature. A remote, privileged threat actor may exploit this vulnerability to execute of unauthorized PowerShell commands.

Affected configurations

• javs javs viewer 8.3.7.250

Weakness · CWE (1)

CWE-506 Embedded Malicious Code weakness

References