Full Report
A recent report from VulnCheck disclosed a new post-authentication vulnerability affecting Four-Faith industrial routers being exploited in the... The post New post-authentication vulnerability discovered in Four-Faith industrial routers appeared first on Industrial Cyber.
Analysis Summary
# Vulnerability: Post-Authentication OS Command Injection in Four-Faith Industrial Routers
## CVE Details
- CVE ID: CVE-2024-12856
- CVSS Score: 7.2 (High)
- CWE: **Not explicitly stated, but aligns with CWE-78 (Improper Neutralization of Special Elements used in an OS Command)**
## Affected Systems
- Products: Four-Faith industrial routers (Models F3x24 and F3x36)
- Versions: At least firmware version 2.0
- Configurations: Requires authentication for remote attack, but default credentials can lead to unauthenticated exploitation.
## Vulnerability Description
The vulnerability is an OS command injection flaw affecting Four-Faith router models F3x24 and F3x36 running firmware version 2.0 or earlier. Authenticated, remote attackers can execute arbitrary operating system commands via the HTTP interface when attempting to modify the system time using the `apply.cgi` script. Crucially, the availability of default credentials on these devices means that an unauthenticated attacker can leverage this flaw to achieve remote command execution.
## Exploitation
- Status: Being exploited in the wild (Reported by VulnCheck)
- Complexity: Low (if default credentials persist, allowing unauthenticated access)
- Attack Vector: Network (Remote)
## Impact
- Confidentiality: High (Potential for reading sensitive system information)
- Integrity: High (Potential for arbitrary OS command execution, leading to system modification)
- Availability: High (Potential for disruption or denial of service)
## Remediation
### Patches
- **Specific patch details are not provided in the summary article.** Users should check the official Four-Faith advisories for firmware updates resolving CVE-2024-12856.
### Workarounds
- **Change Default Credentials:** Immediately change all default credentials on the affected routers. This mitigates the path to unauthenticated exploitation.
- **Restrict Access:** Limit network access to the router's management interface (HTTP/HTTPS) to authorized personnel only, preferably via a secured internal network segment or VPN.
## Detection
- **Indicators of Compromise (IoCs):** Look for unexpected outbound network connections originating from the router, unauthorized command execution logs within the router's system logs, or file modifications.
- **Detection Methods and Tools:** Monitor web traffic to the `apply.cgi` endpoint for unusual payloads or commands being passed in the system time configuration parameters. Ensure asset inventory confirms the presence of affected Four-Faith models and firmware versions.
## References
- VulnCheck advisory on CVE-2024-12856 **(Note: Full URL suppressed as per instructions)**
- The original report mentions CVE-2024-12856 on the VulnCheck site.