The D-Link DIR-853 A1 firmware version 1.20B07 has been identified with a critical stack-based buffer overflow vulnerability. This vulnerability allows attackers to exploit the Password parameter in the SetDynamicDNSSettings module. The severity of this issue is underscored by a CVSS score of 9.8, indicating a critical risk level. Given its nature, this vulnerability poses significant risks to organizations utilizing this firmware.
Risk to organizations includes potential unauthorized access, data loss, and service disruption. Attackers may leverage this vulnerability to execute arbitrary code, which can lead to a complete compromise of the affected system. Organizations using the D-Link DIR-853 firmware should prioritize remediation to protect their networks and data.
It is essential for organizations to assess their exposure to this vulnerability and take appropriate action. The urgency for defenders is critical due to the potential impact on confidentiality, integrity, and availability of their systems.
Currently, no known exploits have been reported in the wild, but the nature of the vulnerability necessitates immediate attention. Organizations should not delay in addressing this vulnerability to prevent possible exploitation.
Organizations should prioritize patching immediately.
Vulnerability Details
The vulnerability is classified as a stack-based buffer overflow, which occurs when a program writes more data to a buffer located on the stack than it can hold. This specific vulnerability affects the D-Link DIR-853 A1 firmware version 1.20B07, allowing unauthorized parameters to overflow and potentially execute arbitrary code.
The CVSS score for this vulnerability is 9.8, indicating a critical severity level. The attack vector is classified as NETWORK, with low attack complexity and no privileges or user interaction required for exploitation. The impact on confidentiality, integrity, and availability is high.
The vulnerability was published on February 12, 2025. It is associated with CWE-787, indicating improper control of a resource through its lifetime.
Technical Analysis
The root cause of this vulnerability lies in improper handling of user input within the Password parameter. By sending specially crafted input to the SetDynamicDNSSettings module, an attacker can induce a stack-based buffer overflow, leading to arbitrary code execution.
The attack vector is primarily network-based, allowing remote attackers to exploit the vulnerability without requiring physical access to the device. The complexity of the attack is low, meaning that it can be executed with minimal effort.
Exploitation of this vulnerability does not require any privileges or user interaction, making it particularly dangerous. If successfully exploited, this vulnerability can compromise the confidentiality, integrity, and availability of the affected system.
Risk & Impact Analysis
Organizations deploying the D-Link DIR-853 firmware face significant risk exposure due to this vulnerability. The potential for unauthorized access and control of network devices could lead to broader network compromises, data breaches, and service disruptions.
The blast radius of this vulnerability is considerable, as devices interconnected in a network can be adversely affected. The urgency for addressing this vulnerability is underscored by its critical CVSS score, necessitating that organizations act swiftly to mitigate risks.
Organizations should conduct thorough assessments of their network configurations and take immediate action to remediate this vulnerability. Given the potential impact on business operations, timely patching is crucial.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected product is the D-Link DIR-853 firmware version 1.20B07. Organizations utilizing this version should take immediate action to patch or remediate the identified vulnerability.
Mitigation & Remediation
D-Link has released patches to address this vulnerability. Organizations are encouraged to update their firmware to the latest version as soon as possible. If a patch is unavailable, organizations should implement additional network security measures to limit exposure until a fix can be applied.
Configuration hardening such as disabling unused services and implementing network segmentation can help mitigate risks associated with this vulnerability.
For ongoing protection, organizations should consider engaging in regular continuous security testing to identify and address vulnerabilities.
Detection Guidance
Organizations should monitor logs for unusual authentication attempts or configuration changes. Behavioral anomalies such as unexpected device reboots or performance degradation may indicate exploitation attempts.
Network signatures for traffic patterns associated with the vulnerability should be established to enhance detection capabilities.
AppSecure Threat Intelligence Insight
This vulnerability highlights a crucial area of concern within networked devices, particularly those used in consumer and enterprise environments. The trend of increasing vulnerabilities in widely-used firmware necessitates proactive measures by organizations to safeguard their assets.
Security teams should be vigilant in monitoring for similar vulnerabilities in their environments and adopt best practices for vulnerability management and remediation. Engaging in comprehensive security assessments can help identify and mitigate risks effectively.
For further reading on vulnerability management, organizations can refer to our guide on vulnerability management programs to enhance their security posture.
Additionally, organizations should stay informed about new vulnerabilities and threat intelligence trends to better prepare for potential risks.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)