Description
An issue in dlink DIR 832x 240802 allows a remote attacker to execute arbitrary code via the function 0x417234
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-11768
1. Vulnerability Assessment and Severity Evaluation
The vulnerability EUVD-2025-11768 affects the D-Link DIR 832x router, specifically in the firmware version 240802. The issue allows a remote attacker to execute arbitrary code via the function located at address 0x417234. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:
- AV:N (Attack Vector: Network): The vulnerability is exploitable remotely over the network.
- AC:L (Attack Complexity: Low): The attack requires low complexity to exploit.
- PR:N (Privileges Required: None): No privileges are required to exploit the vulnerability.
- UI:N (User Interaction: None): No user interaction is required.
- S:U (Scope: Unchanged): The vulnerability does not change the security scope.
- C:H (Confidentiality: High): The vulnerability has a high impact on confidentiality.
- I:H (Integrity: High): The vulnerability has a high impact on integrity.
- A:H (Availability: High): The vulnerability has a high impact on availability.
Given these metrics, the vulnerability poses a significant risk to the affected devices and networks.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector is remote code execution (RCE) via network access. An attacker could exploit this vulnerability by sending crafted packets to the router, targeting the vulnerable function at address 0x417234. Potential exploitation methods include:
- Command Injection: Injecting malicious commands through network packets to execute arbitrary code on the router.
- Buffer Overflow: Exploiting a buffer overflow in the vulnerable function to execute malicious code.
- Memory Corruption: Manipulating memory to execute unauthorized code or gain elevated privileges.
3. Affected Systems and Software Versions
The vulnerability specifically affects the D-Link DIR 832x router with firmware version 240802. It is crucial to identify all deployed instances of this router model and firmware version within the organization or network.
4. Recommended Mitigation Strategies
To mitigate the risk associated with this vulnerability, the following strategies are recommended:
- Firmware Update: Immediately update the firmware to a patched version provided by D-Link. Regularly check for updates and apply them promptly.
- Network Segmentation: Isolate the affected routers from critical network segments to limit the potential impact of an exploit.
- Firewall Rules: Implement strict firewall rules to restrict access to the router's management interface and other critical services.
- Intrusion Detection/Prevention Systems (IDS/IPS): Deploy IDS/IPS to monitor and block suspicious network traffic targeting the vulnerable function.
- Regular Audits: Conduct regular security audits and vulnerability assessments to identify and address similar issues proactively.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant threat to European organizations and individuals using the affected D-Link routers. Given the widespread use of D-Link products, the potential impact includes:
- Data Breaches: Unauthorized access to sensitive data due to compromised routers.
- Network Disruptions: Potential denial-of-service (DoS) attacks leading to network outages.
- Malware Distribution: Routers could be used as entry points for distributing malware within networks.
- Compliance Issues: Non-compliance with data protection regulations such as GDPR due to data breaches.
6. Technical Details for Security Professionals
For security professionals, the following technical details are essential:
- Vulnerable Function: The function at address 0x417234 in the firmware is the point of vulnerability.
- Exploit Code: Review the provided GitHub references for potential exploit code and technical analysis:
- Patch Information: Refer to D-Link's security bulletin for patch details and updates:
- CVE Reference: The vulnerability is also referenced as CVE-2025-29043 in the NVD database:
By understanding these technical details, security professionals can better assess the risk, implement appropriate mitigations, and ensure the security of their networks and systems.
Conclusion
The vulnerability EUVD-2025-11768 in the D-Link DIR 832x router is critical and requires immediate attention. Organizations should prioritize firmware updates, network segmentation, and continuous monitoring to mitigate the risk effectively. The potential impact on European cybersecurity underscores the importance of proactive security measures and regular updates.