A security flaw has been discovered in D-Link DIR-825 up to version 3.00b32. This vulnerability allows an attacker to exploit the function AddPortMapping within the file upnpsoap.c of the component miniupnpd. Specifically, manipulating the argument NewPortMappingDescription results in a buffer overflow, which could allow for arbitrary code execution. The attack must be executed within the local network, which limits its potential impact but does not eliminate the risk.
The vulnerability has been classified with a CVSS base score of 8.6, indicating a high severity level. This score is crucial as it reflects the potential impact of exploitation on confidentiality, integrity, and availability, all rated as high. In addition, the exploit has been released to the public, making it readily available for malicious actors.
Risk to organizations includes unauthorized access to network resources and potential data breaches, especially since this vulnerability affects products that are no longer supported by the maintainer. Organizations should prioritize patching immediately to mitigate these risks.
As this vulnerability is classified as high-risk, defenders must act swiftly. It is recommended to assess D-Link DIR-825 devices in their network and apply any available updates or mitigations to prevent exploitation.
Vulnerability Details
The official description states that a security flaw has been discovered in D-Link DIR-825 up to version 3.00b32. This flaw allows for a buffer overflow through the AddPortMapping function in the miniupnpd component, specifically manipulating the NewPortMappingDescription argument.
The CVSS score of 8.6 classifies this vulnerability as high severity, which indicates a significant threat level. The attack vector is adjacent, meaning it requires access to the local network, while the attack complexity is low, requiring minimal effort on the attacker's part.
This vulnerability is associated with multiple weaknesses, specifically CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-120 (Buffer Copy without Checking Size of Input).
Technical Analysis
The root cause of the vulnerability lies in the improper handling of input within the AddPortMapping function. Specifically, the NewPortMappingDescription argument is not validated correctly, allowing an attacker to overflow the buffer. This results in potential arbitrary code execution if an attacker successfully exploits the vulnerability.
The attack vector is adjacent, implying that the attacker must be on the same local network as the target device to execute the exploit. With low attack complexity and low privileges required, even an unskilled attacker could potentially exploit this vulnerability.
User interaction is not required for exploitation, which further increases the risk. The vulnerability impacts confidentiality, integrity, and availability, all rated as high, indicating a severe threat to the affected systems.
Risk & Impact Analysis
The deployment risk associated with this vulnerability is significant, particularly for organizations utilizing D-Link DIR-825 devices. The potential for unauthorized access and the ability to execute arbitrary code could lead to severe consequences, such as data breaches and disruption of services.
Organizations should be aware of the blast radius, as an attacker could potentially gain control over any device connected to the same local network. This means that the impact could extend beyond the direct target, affecting multiple systems if proper containment measures are not in place.
Given the CVSS score of 8.6 and the public availability of exploit code, organizations must act swiftly. Organizations should address this vulnerability in their priority patch cycle, as the longer it remains unmitigated, the greater the risk to their network.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects all versions of D-Link DIR-825 up to 3.00b32. Products that are no longer supported by the maintainer are particularly susceptible, as no patches or updates are likely to be provided.
Mitigation & Remediation
Organizations should prioritize patching D-Link DIR-825 devices to ensure that the buffer overflow vulnerability is addressed. If a patch is not available, consider implementing network controls to restrict access to affected devices and review configuration hardening options.
For more information on penetration testing and how it can help identify similar vulnerabilities, organizations can refer to our penetration testing services.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for unusual access patterns or attempts to manipulate the AddPortMapping function. Additionally, any behavioral anomalies related to network traffic should be investigated to uncover possible exploitation attempts.
AppSecure Threat Intelligence Insight
This vulnerability highlights the importance of maintaining updated firmware for network devices. The fact that it affects unsupported products exemplifies the risk associated with neglecting device management. Organizations should adopt a proactive approach to vulnerability management to ensure their systems remain secure.
As a strategic defensive takeaway, organizations are encouraged to implement regular security assessments and establish a thorough vulnerability management program. For comprehensive guidance, they can explore our blog on vulnerability management programs and consider utilizing our penetration testing methodology to enhance their security posture.
By staying informed and taking action against vulnerabilities, organizations can significantly reduce their risk exposure and protect their assets.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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