Security readout for executives and security teams
Plain-English summary
A Justice AV Solutions Viewer installer for version 8.3.7.250 contained malicious code. If run, it could allow unauthorized PowerShell activity with serious confidentiality, integrity, and availability impact. CISA lists CVE-2024-4978 in KEV, so treat exposure as urgent where this installer was downloaded or executed.
Executive priority
Prioritize immediate scoping and containment. This is not a routine software bug; it is malicious code in a trusted software installer, with KEV evidence of exploitation and potential high business impact on compromised endpoints.
Technical view
CVE-2024-4978 is CWE-506 malicious code in JAVS Viewer Setup 8.3.7.250-1, with an unexpected Authenticode signature. The CVSS 4.0 score is 8.7. The source bundle describes possible remote privileged exploitation requiring user action to execute unauthorized PowerShell commands.
Likely exposure
Exposure is likely limited to environments that obtained or ran Justice AV Solutions Viewer 8.3.7.250 or the specific Viewer Setup 8.3.7.250-1 installer. Systems using other versions are not shown as affected in the provided data.
Exploitation context
Active exploitation is supported by CISA KEV inclusion. Rapid7 characterizes the issue as backdoored JAVS Viewer software used in an apparent supply-chain attack. The bundle does not provide safe details on intrusion scale, initial delivery paths, or complete remediation mechanics.
Researcher notes
The provided evidence supports malicious installer behavior and unauthorized PowerShell execution risk, but does not include complete indicators, hashes, or confirmed fixed versions. Avoid assuming all JAVS products are affected; the listed affected product is JAVS Viewer 8.3.7.250.
Mitigation direction
- Stop using or distributing Viewer Setup 8.3.7.250-1 immediately.
- Check JAVS guidance and downloads for trusted replacement software.
- Treat hosts that executed the installer as potentially compromised.
- Review controls for unauthorized PowerShell execution and alerting.
- Preserve installer samples, hashes, and host logs for investigation.
Validation and detection
- Inventory endpoints for JAVS Viewer version 8.3.7.250.
- Identify whether Viewer Setup 8.3.7.250-1 was downloaded or executed.
- Verify installer signatures against expected vendor signing information.
- Review PowerShell and endpoint security logs after installer execution.
- Check CISA KEV and vendor references for updated guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-506: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2024-4978 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.7 (4.0)
- Known Exploited
- Yes
- Published
Vector: 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
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
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——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
8.7HighVector: 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
Source materials
- CVE List V5 sourceCVE List V5
- https://twitter.com/2RunJack2/status/1775052981966377148CVE reference
- https://www.rapid7.com/blog/post/2024/05/23/cve-2024-4978-backdoored-justice-av-solutions-viewer-software-used-in-apparent-supply-chain-attack/CVE reference
- https://www.javs.com/downloads/CVE reference
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-4978CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Embedded Malicious Code
Embedded Malicious Code represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.