CVE-2019-7313 : Security Advisory and Response

Buildbot prior to version 1.8.1 is vulnerable to CRLF injection in the Location header of specific pages, allowing for potential attacks on /auth/login and /auth/logout through the redirect parameter.

Understanding CVE-2019-7313

In Buildbot versions before 1.8.1, a security flaw in www/resource.py enables CRLF injection in the Location header, affecting the redirect parameter on certain pages.

What is CVE-2019-7313?

This CVE identifies a vulnerability in Buildbot that permits CRLF injection in the Location header of /auth/login and /auth/logout pages via the redirect parameter, potentially impacting other websites within the same domain.

The Impact of CVE-2019-7313

The vulnerability can be exploited to introduce malicious content into the Location header, leading to various attacks such as HTTP response splitting and session fixation.

Technical Details of CVE-2019-7313

Buildbot CVE-2019-7313 involves the following technical aspects:

Vulnerability Description

CRLF injection in the Location header of /auth/login and /auth/logout pages

Affected Systems and Versions

Buildbot versions prior to 1.8.1

Exploitation Mechanism

Utilizing the redirect parameter to inject malicious content into the Location header

Mitigation and Prevention

To address CVE-2019-7313, consider the following steps:

Immediate Steps to Take

Upgrade Buildbot to version 1.8.1 or later to mitigate the vulnerability
Monitor and restrict user input to prevent CRLF injection attacks

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities
Implement input validation and output encoding to prevent CRLF injection

Patching and Updates

Stay informed about security updates and apply patches promptly to protect against potential exploits.