CVE-2021-26086 is a medium severity path traversal vulnerability affecting Atlassian Jira Server and Data Center. This vulnerability allows remote attackers to read particular files via a path traversal issue in the /WEB-INF/web.xml endpoint. The CVSS score for this vulnerability is 5.3, indicating a medium risk level that organizations need to address.
The affected versions include those prior to version 8.5.14, as well as from version 8.6.0 before 8.13.6, and from version 8.14.0 before 8.16.1. Risk to organizations includes exposure of sensitive files that could potentially lead to unauthorized access to critical data.
With known exploits already available, organizations should prioritize patching immediately to protect their systems from potential attacks leveraging this vulnerability.
This vulnerability is particularly concerning as it allows remote attackers to target vulnerable instances of Jira without needing any authentication. Therefore, it is crucial for organizations utilizing affected versions to take swift action.
Vulnerability Details
The official description of CVE-2021-26086 states that it allows remote attackers to read specific files due to a path traversal vulnerability in the /WEB-INF/web.xml endpoint. The CVSS v3.1 score is 5.3, categorized as medium severity. Affected products include Jira Server and Data Center, with the issue disclosed on August 16, 2021.
The CWE classification for this vulnerability is CWE-22, indicating that it is related to improper restriction of pathname references. This vulnerability is particularly alarming as it poses a risk of unauthorized file access, making it crucial for organizations to address it promptly.
Technical Analysis
The root cause of this vulnerability is a flaw in the handling of file paths, which leads to a path traversal issue. Attackers can exploit this vulnerability via the network, and the attack complexity is low, requiring no privileges or user interaction.
The confidentiality impact is low, as attackers may access sensitive files, but integrity and availability are not affected. Organizations should be aware that the risk is primarily related to data exposure, which could have significant implications.
Risk & Impact Analysis
Organizations using affected versions of Jira Server and Data Center face significant risks, including potential exposure of sensitive information that could lead to unauthorized data access. The blast radius is substantial, considering the widespread deployment of these products in various organizations.
Urgency is heightened due to the CVSS score of 5.3 and confirmed exploitation status, as indicated in the Known Exploited Vulnerabilities (KEV) database. This vulnerability underscores the importance of proactive vulnerability management and timely patching to mitigate risks.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The versions affected by CVE-2021-26086 include Atlassian Jira Server and Data Center versions prior to 8.5.14, as well as versions starting from 8.6.0 up to but not including 8.13.6, and from 8.14.0 up to but not including 8.16.1.
Mitigation & Remediation
Organizations must apply the appropriate patches and updates to their Jira Server and Data Center installations to remediate this vulnerability. Specific version recommendations should be followed as outlined by the vendor. If patches are unavailable, organizations should consider discontinuing use of the affected product until a resolution is in place.
For further assistance, organizations can consult the penetration testing methodology to ensure comprehensive security assessments.
Detection Guidance
Monitoring logs for suspicious access attempts to the /WEB-INF/web.xml endpoint can help in detecting exploitation attempts. Additionally, organizations should look for any unusual file access patterns that could indicate unauthorized file reads.
AppSecure Threat Intelligence Insight
CVE-2021-26086 reflects a broader trend of path traversal vulnerabilities in web applications. Security teams should be aware of this pattern and consider implementing stricter input validation measures to mitigate similar vulnerabilities in their own applications.
Organizations can benefit from a robust vulnerability management program that emphasizes timely updates and monitoring for potential vulnerabilities.
In addition, conducting regular continuous penetration testing can help to identify and remediate vulnerabilities proactively.
Lastly, organizations should remain vigilant regarding new developments in the threat landscape, ensuring that they are prepared to respond swiftly to emerging vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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