CVE-2021-20092 is classified as a high-severity vulnerability affecting Buffalo WSR-2533DHPL2 firmware version 1.02 and earlier, as well as WSR-2533DHP3 firmware version 1.24 and earlier. This vulnerability allows unauthorized actors to access sensitive information through the web interfaces of these devices. With a CVSS score of 7.5, this vulnerability poses a significant risk to organizations utilizing affected firmware.
The risk to organizations includes potential exposure of sensitive data, which could lead to further attacks or unauthorized access to network resources. The lack of proper access restrictions makes it imperative for affected users to prioritize patching these vulnerabilities immediately.
Currently, there are no known exploits or public proof of concepts available for CVE-2021-20092. However, given its high severity and potential impact, organizations should remain vigilant and address this vulnerability in their next patch cycle.
Organizations should prioritize patching immediately to mitigate the risks associated with this vulnerability and ensure the security of their networks.
Vulnerability Details
The official description of CVE-2021-20092 states: 'The web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 do not properly restrict access to sensitive information from an unauthorized actor.' This vulnerability falls under the Common Weakness Enumeration (CWE) category of 'CWE-287: Improper Authentication.'
The vulnerability has a CVSS score of 7.5, indicating high severity. It is characterized by the following parameters: CVSS Vector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'. The attack vector is network-based, with low attack complexity and no privileges or user interaction required, resulting in a high confidentiality impact.
Technical Analysis
The root cause of this vulnerability lies in the failure of the web interfaces to properly restrict access to sensitive information. As a result, unauthorized actors can exploit this weakness to retrieve confidential data. The attack vector is network-based, allowing remote attackers to exploit the vulnerability without needing physical access to the device.
The attack complexity is low, meaning that attackers do not require advanced skills to exploit this vulnerability. Privileges required to exploit are none, and user interaction is not necessary, making this vulnerability particularly threatening. The impact on confidentiality is high, as sensitive information may be disclosed without authorization.
Risk & Impact Analysis
The deployment of vulnerable Buffalo firmware in organizational networks presents a significant risk. The potential exposure of sensitive data can have severe consequences, including data breaches and unauthorized access to internal systems. The blast radius for this vulnerability is considerable, as it affects multiple firmware versions across different models.
Given the CVSS score and the implications of unauthorized data access, organizations should address this vulnerability as a high priority. The urgency for remediation is critical, as failure to update vulnerable firmware can lead to severe security incidents.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
This vulnerability affects Buffalo WSR-2533DHPL2 firmware versions 1.02 and earlier, as well as WSR-2533DHP3 firmware versions 1.24 and earlier. Organizations should upgrade to the latest firmware version to mitigate this vulnerability.
Mitigation & Remediation
To remediate CVE-2021-20092, organizations should apply the latest firmware update provided by Buffalo for both affected models. If a patch is unavailable, consider implementing network segmentation to restrict access to the vulnerable devices and monitor for suspicious activity.
Continuous security testing can help in identifying similar vulnerabilities in the future. Organizations may consider investing in continuous penetration testing to proactively secure their networks.
Detection Guidance
Organizations should monitor logs for indicators of unauthorized access attempts, particularly targeting the web interfaces of the affected Buffalo firmware. Detecting unusual patterns of access can help identify potential exploitation of this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-20092 underscores the necessity for robust security measures in firmware development and deployment. This vulnerability highlights a pattern where inadequate access controls can lead to severe data exposure risks.
Security teams should take lessons from this incident to improve their vulnerability management practices. Regular updates and security assessments are critical in preventing similar vulnerabilities in the future.
For organizations looking to enhance their security posture, exploring resources on vulnerability management programs can provide valuable insights into effective strategies.
Additionally, organizations may benefit from examining penetration testing methodologies to identify and address vulnerabilities proactively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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