D-Link DIR-853 A1 firmware version 1.20B07 has been identified with a stack-based buffer overflow vulnerability. This flaw arises specifically via the Password parameter within the SetQuickVPNSettings module. The vulnerability is classified with a high CVSS score of 8.8, indicating significant risk to affected systems.
Risk to organizations includes potential unauthorized access, data leakage, and service disruption, particularly due to the vulnerability's network attack vector combined with low attack complexity. Given these factors, organizations must prioritize remediation efforts.
Currently, there are no known public exploits for this vulnerability, but the potential for exploitation remains high due to the nature of the flaw. Organizations should address this vulnerability in their patch management cycle to reduce exposure.
Organizations should prioritize patching immediately, as the exploitability of this vulnerability is high, and it poses a significant risk to the integrity and availability of the affected D-Link devices.
Vulnerability Details
The vulnerability in question, CVE-2025-25745, was published on February 14, 2025, and has been analyzed extensively. The official description states that it allows for a stack-based buffer overflow through the Password parameter in the SetQuickVPNSettings module. The CVSS score of 8.8 highlights the high severity of this vulnerability, indicating a critical risk to confidentiality, integrity, and availability.
This vulnerability has been classified under CWE-121, which refers to stack-based buffer overflow weaknesses. The affected product is the D-Link DIR-853 firmware version 1.20B07.
Technical Analysis
The root cause of this vulnerability lies in improper handling of input data for the Password parameter. Attackers may leverage this oversight to perform buffer overflow attacks, potentially leading to arbitrary code execution or denial of service.
The attack vector for exploiting this vulnerability is network-based, requiring no prior authentication. While the attack complexity is low, successful exploitation necessitates user interaction. The impacts of successful exploitation are severe—confidentiality, integrity, and availability may all be compromised.
Risk & Impact Analysis
The potential real-world implications of this vulnerability are significant, especially in environments where the D-Link DIR-853 device is deployed. Attackers could exploit this vulnerability to gain unauthorized access to sensitive data or disrupt network services.
Organizations must assess the blast radius of this vulnerability considering the prevalence of D-Link devices in their infrastructure. The urgency for addressing this issue is underscored by the CVSS score of 8.8, highlighting a high risk classification.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
This vulnerability affects D-Link DIR-853 firmware version 1.20B07. All versions prior to vendor patch are susceptible.
Mitigation & Remediation
To mitigate this vulnerability, organizations should apply patches as soon as they are available from D-Link. It is critical to upgrade to the latest firmware version to ensure protection against this vulnerability. If a patch is not available, organizations should consider implementing network segmentation and strict access controls to limit exposure.
Organizations should validate remediation through penetration testing to identify similar weaknesses.
Detection Guidance
Organizations should monitor logs for unusual access attempts, especially related to the Password parameter in VPN settings. Behavioral anomalies, such as unexpected service restarts or increased error rates, should also be investigated.
AppSecure Threat Intelligence Insight
This vulnerability serves as a reminder of the importance of secure coding practices in device firmware. Organizations should consider conducting a thorough audit of their device security protocols to prevent similar vulnerabilities.
In light of this vulnerability, organizations may benefit from reviewing their vulnerability management programs to enhance their defenses.
Strategic defensive takeaways include the implementation of robust security measures, regular firmware updates, and continuous monitoring of networked devices.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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