CVE-2021-44140 is a critical vulnerability in Apache JSPWiki, specifically affecting versions up to 2.11.0.M8. This vulnerability allows remote attackers to delete arbitrary files within a system hosting a JSPWiki instance. The exploitation occurs through a carefully crafted HTTP request during the logout process, targeting files that are accessible to the user running the JSPWiki instance. The severity of this vulnerability, classified with a CVSS score of 9.1, indicates a significant risk to organizations that have not yet upgraded their systems.
Organizations utilizing vulnerable versions of JSPWiki are at a heightened risk, as the ability for attackers to delete files can lead to data loss, service disruption, and further compromise of the system. Given its critical nature, organizations should prioritize patching to version 2.11.0 or later to mitigate these risks. The vulnerability was disclosed on November 24, 2021, and remains relevant as of the latest modification date of November 21, 2024.
With no known exploits in the wild, it is crucial for defenders to act swiftly to remediate this issue. Organizations should assess their current deployments and ensure they are using updated versions of JSPWiki to prevent potential exploitation. The urgency for remediation is underscored by the critical status of this vulnerability and the potential impact on organizational operations.
The risk to organizations includes the potential for unauthorized deletion of sensitive files, which can compromise both data integrity and availability. Therefore, organizations must take immediate action to upgrade their systems and implement security measures to protect against this and similar vulnerabilities.
Vulnerability Details
CVE-2021-44140 allows remote attackers to delete arbitrary files in a system hosting a JSPWiki instance, versions up to 2.11.0.M8, through a crafted HTTP request on logout, provided the target files are accessible to the JSPWiki user. The CVSS score of 9.1 reflects its critical severity, emphasizing the need for prompt action. The vulnerability is associated with CWE-276: Incorrect Default Permissions. Organizations are advised to upgrade to version 2.11.0 or later to address this issue.
Technical Analysis
The root cause of this vulnerability lies in the insufficient validation of user permissions during the logout process, allowing attackers to craft requests that can delete files. The attack vector is network-based, with low complexity, requiring no privileges or user interaction. The impacts on confidentiality are none, while integrity and availability are significantly affected, leading to potential data loss and service disruptions.
Risk & Impact Analysis
The real-world risk of CVE-2021-44140 is substantial. Organizations running vulnerable versions of JSPWiki face threats that could result in unauthorized file deletion, impacting business operations and data integrity. The potential blast radius includes any files accessible through the JSPWiki instance, emphasizing the importance of immediate remediation to safeguard critical data. Given the CVSS score of 9.1, organizations should prioritize patching immediately.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
JSPWiki versions up to 2.11.0.M8 are affected by this vulnerability. Organizations should ensure they upgrade to version 2.11.0 or later to mitigate the risks associated with CVE-2021-44140.
Mitigation & Remediation
To remediate CVE-2021-44140, Apache JSPWiki users must upgrade to version 2.11.0 or later. If upgrading is not immediately possible, organizations should consider implementing workarounds such as restricting access to sensitive files and ensuring proper user permissions are configured. Regular monitoring and security assessments are also recommended to detect any anomalies that may indicate attempts to exploit this vulnerability. For additional support, organizations may refer to penetration testing services that can help identify and mitigate similar vulnerabilities.
Detection Guidance
Organizations should monitor logs for any unauthorized access attempts or anomalies in file deletion activities. Behavioral changes in user accounts, especially those with administrative privileges, should be flagged for further investigation. Implementing network signatures to detect unusual logout requests may also provide an additional layer of defense against exploitation.
AppSecure Threat Intelligence Insight
CVE-2021-44140 highlights the importance of maintaining updated software versions to mitigate vulnerabilities. The lack of known exploits does not diminish the need for vigilance, as attackers consistently seek to exploit unpatched systems. Security teams should prioritize regular updates and comprehensive security assessments. For further reading, consider exploring topics on penetration testing methodology and the development of an effective vulnerability management program to ensure robust defenses against emerging threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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