Overview
CVE-2025-60672 describes a critical unauthenticated command injection vulnerability found in the D-Link DIR-878A1 router, specifically affecting firmware version FW101B04.bin. This vulnerability allows a remote attacker to execute arbitrary commands on the router without any authentication, potentially leading to full device compromise.
Technical Details
The vulnerability lies within the ‘SetDynamicDNSSettings’ functionality of the router’s web interface, accessible via ‘prog.cgi’. The ‘ServerAddress’ and ‘Hostname’ parameters provided in an HTTP request are stored in the NVRAM (Non-Volatile Random Access Memory) without proper sanitization. Subsequently, these parameters are used by the ‘rc’ service to construct system commands. These commands are then executed using the ‘twsystem()’ function. An attacker can inject malicious commands within these parameters, allowing for arbitrary command execution at the system level.
The lack of authentication required to trigger this functionality makes it particularly dangerous, as any unauthenticated user can send a specially crafted HTTP request to exploit the vulnerability.
CVSS Analysis
Unfortunately, at the time of writing, the CVSS score and severity for CVE-2025-60672 are listed as N/A (Not Available). Given the nature of the vulnerability (unauthenticated remote command execution), it is highly likely that once a CVSS score is assigned, it will be rated as critical or high severity due to the potential for complete system compromise.
Possible Impact
The impact of this vulnerability is severe. A successful exploit can lead to:
- Full Device Compromise: Attackers can gain complete control of the router.
- Malware Installation: The router can be used to host and distribute malware to connected devices.
- Data Theft: Sensitive information stored on the router or passing through it can be stolen.
- Network Hijacking: The router can be used to redirect network traffic to malicious servers.
- Botnet Recruitment: The compromised router can be added to a botnet, participating in DDoS attacks and other malicious activities.
Mitigation or Patch Steps
The most crucial step is to update the router’s firmware to a patched version that addresses this vulnerability. D-Link has been notified and hopefully provides a firmware update. The following steps are recommended:
- Check for Firmware Updates: Visit the D-Link website and navigate to the support section for the DIR-878A1 router. Check for available firmware updates.
- Apply Firmware Update: If a firmware update is available, follow the instructions provided by D-Link to install it.
- Monitor D-Link Security Bulletins: Keep an eye on the D-Link Security Bulletin page for updates and announcements related to this and other vulnerabilities.
- Disable Remote Management (If Possible): If your router offers the option to disable remote management, consider doing so to reduce the attack surface.
- Use a Strong Password: While this vulnerability bypasses authentication, always use a strong and unique password for your router’s administrative interface.
