CVE-2021-34429 is a medium-severity vulnerability found in Eclipse Jetty versions 9.4.37 to 9.4.42, 10.0.1 to 10.0.5, and 11.0.1 to 11.0.5. This vulnerability allows attackers to craft URIs using encoded characters that can potentially expose the content of the WEB-INF directory and/or bypass specific security constraints. The severity is classified as medium with a CVSS score of 5.3, indicating that organizations should take this vulnerability seriously.
The implications of this vulnerability are significant, as it may lead to unauthorized access to sensitive files, which could compromise application integrity and confidentiality. Organizations using affected versions of Jetty should prioritize patching to prevent potential data breaches.
According to the enriched CVE intelligence data, this vulnerability has been confirmed to have associated exploits available, emphasizing the urgency for organizations to implement remediation strategies without delay.
Organizations should prioritize patching immediately. The vendor has released updates to mitigate this vulnerability, and timely application of these updates is critical to maintaining the security posture of affected applications.
Vulnerability Details
The official description of CVE-2021-34429 indicates that encoded URIs can be used to access sensitive resources in the WEB-INF directory, which is traditionally protected in Java web applications. The vulnerability is classified under CWE-200, indicating improper exposure of sensitive information, and CWE-551, relating to failure to restrict URL access.
The CVSS score of 5.3 indicates medium severity, with the attack vector classified as network. Attack complexity is low, requiring no privileges or user interaction, making it relatively straightforward for attackers to exploit.
Technical Analysis
The root cause of CVE-2021-34429 stems from insufficient validation of URI inputs, allowing crafted requests that bypass security checks implemented in the application. The attack vector is network-based, with low complexity, and no privileges or user interaction required for exploitation.
As a result, the confidentiality impact is classified as low, with no integrity or availability impact. Organizations should remain vigilant against these types of vulnerabilities, reinforcing defensive measures in their web applications.
Risk & Impact Analysis
Risk to organizations includes unauthorized access to sensitive files, which could lead to data breaches and potential regulatory repercussions. The potential blast radius is significant, as multiple components and products are impacted, including various Oracle and NetApp products.
With an EPSS score indicating a high likelihood of exploitation, organizations must assess their exposure and take immediate action to mitigate any risks. Given that the vulnerability has been identified as exploitable, prioritization in the patch cycle is imperative.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects the following versions of Eclipse Jetty: 9.4.37 to 9.4.42, 10.0.1 to 10.0.5, and 11.0.1 to 11.0.5. Additionally, various components from NetApp and Oracle are also affected.
Mitigation & Remediation
To address CVE-2021-34429, organizations should immediately upgrade to the latest version of Eclipse Jetty where the vulnerability has been patched. If a patch is unavailable, consider implementing workarounds such as stricter URI validation and server configuration hardening. Organizations are encouraged to regularly monitor for security updates and apply them promptly.
For further protection, organizations may consider engaging in penetration testing to validate their security configurations and identify potential weaknesses.
Detection Guidance
Organizations should monitor logs for any unauthorized access attempts to the WEB-INF directory. Behavioral anomalies, such as unexpected file access patterns, should also raise alerts. Network signatures should be updated to detect potential exploitation attempts related to this vulnerability.
AppSecure Threat Intelligence Insight
CVE-2021-34429 highlights the importance of robust input validation in web applications, particularly for publicly accessible components. This vulnerability serves as a reminder for organizations to regularly assess and strengthen their security postures against similar vulnerabilities.
Security teams should implement continuous monitoring and engage in regular security assessments to identify and mitigate vulnerabilities proactively. For organizations utilizing cloud services, conducting an effective cloud security assessment is critical for safeguarding sensitive data.
In conclusion, with the evolving threat landscape, organizations must prioritize timely updates and adopt a proactive security posture to defend against potential exploits effectively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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