CVE-2021-40655 is a high-severity information disclosure vulnerability affecting D-Link DIR-605 B2 Firmware Version 2.01MT. This vulnerability allows an attacker to obtain sensitive information, including usernames and passwords, by forging a post request to the /getcfg.php page. The CVSS score for this vulnerability is 7.5, indicating a high risk to organizations that utilize affected devices.
The potential impact is significant, as attackers may leverage this vulnerability to gain unauthorized access to user credentials, leading to further exploitation of the network. Organizations should take immediate action to address this vulnerability to prevent unauthorized access and potential data breaches.
This vulnerability has been analyzed and is classified as actively exploited, as it has been included in the Known Exploited Vulnerabilities catalog. Organizations using D-Link DIR-605 routers should prioritize patching this vulnerability immediately to mitigate risks associated with exposure.
Failure to address this vulnerability could result in unauthorized access and exploitation of sensitive information, making it paramount for affected organizations to take action.
Vulnerability Details
CVE-2021-40655 is described as an information disclosure issue within the D-Link DIR-605 B2 Firmware. The vulnerability allows attackers to obtain a user name and password by forging a post request to the /getcfg.php page. The primary CWE classification associated with this vulnerability is CWE-863.
The CVSS score is 7.5, indicating a high severity level, and highlights the criticality of this vulnerability. The attack vector is network-based, and the attack complexity is low, with no privileges or user interaction required for exploitation.
This vulnerability was published on September 24, 2021, and the affected product is the D-Link DIR-605 router. Organizations should be aware that this issue poses a significant risk to their network security.
Technical Analysis
The root cause of CVE-2021-40655 lies in improper handling of user input on the /getcfg.php page, allowing an attacker to exploit this weakness by forging a post request to retrieve sensitive information. The attack vector is network-based, meaning that attackers can exploit this vulnerability remotely without physical access to the affected device.
The attack complexity is low, as attackers do not require any special privileges or user interaction to exploit this vulnerability. It has a high confidentiality impact, as it allows unauthorized access to sensitive user information, while the integrity and availability impacts are negligible.
Risk & Impact Analysis
Risk to organizations includes potential unauthorized access to sensitive data, leading to further exploitation within the network. Given the high CVSS score of 7.5 and its inclusion in the KEV catalog, organizations should prioritize remediation efforts. The potential blast radius could extend to any user credentials stored within the device, increasing the urgency for patching.
Organizations should assess their exposure and implement necessary measures to address this vulnerability as part of their security posture. Immediate action is recommended to mitigate potential risks.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The affected version for this vulnerability is D-Link DIR-605 B2 Firmware Version 2.01MT. All versions prior to the vendor patch are vulnerable.
Mitigation & Remediation
Organizations should prioritize patching this vulnerability. D-Link has provided updates to remediate this issue. It is recommended to upgrade to the latest version available from the vendor. If a patch is not available, organizations should consider implementing network controls to limit exposure and monitor traffic to the affected page.
Additionally, conducting a thorough security assessment, including penetration testing, can help identify any weaknesses associated with this vulnerability. For more comprehensive security assessments, organizations can explore penetration testing services that assess the security of their infrastructure.
Detection Guidance
To detect potential exploitation, organizations should monitor logs for suspicious activity related to the /getcfg.php page. Behavioral anomalies such as unusual post requests or access attempts from unexpected IP addresses should be flagged for further investigation.
AppSecure Threat Intelligence Insight
CVE-2021-40655 represents a critical issue within legacy D-Link products, underscoring the risks associated with outdated hardware. Organizations should establish a proactive vulnerability management program to ensure timely identification and remediation of such vulnerabilities.
For further reading on vulnerability management and strategies, organizations can refer to vulnerability management programs that help in mitigating risks effectively. Additionally, exploring penetration testing methodologies can further enhance the security posture against such vulnerabilities.
Finally, organizations should also review cloud security assessment best practices as part of their overall security strategy.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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