CVE-2015-2156: Information Exposure in Netty
Summary
CVE-2015-2156: Information Exposure in Netty. Affects io.netty:netty-parent versions >= 4.0.0, < 4.0.28.Final. Fixed in 4.0.28.Final. How to fix ↓
Also tracked for
- netty · Debian:11
The same CVE-2015-2156 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
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Background
Netty is a popular open-source networking framework for building high-performance, scalable applications. It provides an asynchronous event-driven architecture that allows developers to easily create network servers and clients. Netty is widely used in various applications, including web servers, proxy servers, and messaging systems. However, versions before 3.9.8.Final, 3.10.x before 3.10.3.Final, 4.0.x before 4.0.28.Final, and 4.1.x before 4.1.0.Beta5 are vulnerable to an information exposure issue.
Vulnerability Detail
The vulnerability in Netty and Play Framework 2.x allows remote attackers to bypass the httpOnly flag on cookies and obtain sensitive information. This is due to improper validation of cookie name and value characters. By exploiting this vulnerability, an attacker can potentially access sensitive data, such as session tokens or user credentials, leading to unauthorized access or other security breaches.
How To Fix
Minimum fixed version
4.0.28.Final
This is the first release that contains the fix.
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Workaround
If upgrading to the latest version is not immediately feasible, a possible workaround is to manually validate and sanitize cookie names and values before processing them. This can be done by implementing custom validation logic in your application code. Here is an example in Java using Netty:
// Validate and sanitize cookie name
String sanitizedCookieName = validateAndSanitize(cookie.getName());
// Validate and sanitize cookie value
String sanitizedCookieValue = validateAndSanitize(cookie.getValue());
// Process the sanitized cookie
processCookie(sanitizedCookieName, sanitizedCookieValue);
Conclusion
The information exposure vulnerability in Netty and Play Framework can lead to unauthorized access and compromise sensitive data. It is crucial to upgrade to the latest patched version or apply the recommended workaround. For further assistance and support in vulnerability remediation, please contact DevNack.com.
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FAQ
Netty is an open-source networking framework for building high-performance, scalable applications. It provides an asynchronous event-driven architecture and is widely used in various applications, including web servers, proxy servers, and messaging systems.
This vulnerability allows remote attackers to bypass the httpOnly flag on cookies and obtain sensitive information. It can lead to unauthorized access, session hijacking, or other security breaches.
Versions before 3.9.8.Final, 3.10.x before 3.10.3.Final, 4.0.x before 4.0.28.Final, and 4.1.x before 4.1.0.Beta5 of Netty are affected. Play Framework versions before 2.3.9 are also vulnerable.
To fix this vulnerability, it is recommended to upgrade to the latest patched version of Netty or Play Framework. Ensure that all dependencies are updated and compatible with your application.
If immediate upgrading is not feasible, a possible workaround is to manually validate and sanitize cookie names and values before processing them. Implement custom validation logic in your application code.
