Vulnerability in tomcat7 - security update
Summary
DLA-779-1: tomcat7 - security update. Affects tomcat7 versions < 7.0.28-4+deb7u9. Fixed in 7.0.28-4+deb7u9. How to fix ↓
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Background
Tomcat7 is a popular open-source web server and servlet container that is widely used for hosting Java-based web applications. It provides a robust and scalable platform for running Java web applications, supporting features such as HTTP connectors, session management, and security mechanisms. However, a vulnerability has been discovered in the error handling of the send file code for the NIO HTTP connector in Tomcat7.
Vulnerability Detail
The vulnerability in Tomcat7's send file code allows for the current Processor object to be added to the Processor cache multiple times. This can result in the same Processor being used for concurrent requests, leading to information leakage between requests. This information can include sensitive data such as session IDs and response bodies. The vulnerability also includes a regression when running Tomcat7 with SecurityManager enabled, due to an incomplete fix for a previous vulnerability (CVE-2016-6816).
How To Fix
Minimum fixed version
7.0.28-4+deb7u9
This is the first release that contains the fix.
sudo apt-get install --only-upgrade tomcat7Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no specific workaround mentioned for this vulnerability. The recommended solution is to apply the security update and upgrade to the fixed version of tomcat7.
Conclusion
In conclusion, the vulnerability in Tomcat7's send file code can lead to information leakage between concurrent requests, potentially exposing sensitive data. To mitigate this vulnerability, it is recommended to upgrade to the fixed version of tomcat7. For further support on vulnerability remediation, you can contact Devnack at DevNack.com.
See every vulnerability recorded for tomcat7 →
FAQ
The vulnerability in Tomcat7 can lead to information leakage between concurrent requests, potentially exposing sensitive data such as session IDs and response bodies.
You can use Vulert's playground (https://vulert.com/scanner) to check if your application is affected by this vulnerability. Vulert uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities in the software.
No specific workaround is mentioned for this vulnerability. It is recommended to apply the security update and upgrade to the fixed version of tomcat7.
You can find more information about Debian LTS security advisories, including how to apply updates and frequently asked questions, on the Debian LTS wiki: https://wiki.debian.org/LTS
For further support on vulnerability remediation, you can reach out to Devnack at info@devnack.com.
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