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

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.

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
Justice AV Solutions	Viewer	8.3.7.250

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2024-05-29. Ransomware use: Unknown.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2024-05-23T01:56:37.946Z
• Last modified: 2025-10-21T23:05:17.733Z
• Added to CISA KEV: 2024-05-29
• BOD 22-01 due: 2024-06-19

09References

• twitter.com — https://twitter.com/2RunJack2/status/1775052981966377148
• www.rapid7.com — https://www.rapid7.com/blog/post/2024/05/23/cve-2024-4978-backdoored-justice-av-…
• www.javs.com — https://www.javs.com/downloads/