Improper Validation of X.509 Certificates in python-bugzilla
Summary
CVE-2013-2191: python-bugzilla has improper validation of X.509 certificates. Affects python-bugzilla versions < 0.9.0. Fixed in 0.9.0. How to fix ↓
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Background
python-bugzilla is a Python library that provides a convenient interface for interacting with Bugzilla, a popular bug tracking system. It allows users to query, create, and modify Bugzilla bugs programmatically. The library is widely used by developers and organizations to automate bug management processes. However, prior to version 0.9.0, python-bugzilla did not properly validate X.509 certificates, making it vulnerable to man-in-the-middle attacks.
Vulnerability Detail
The vulnerability in python-bugzilla arises from its lack of X.509 certificate validation. This means that when establishing a connection to a Bugzilla server, the library does not verify the authenticity of the server's certificate. As a result, an attacker with the ability to intercept network traffic can present a crafted certificate, impersonating the Bugzilla server and potentially gaining unauthorized access to sensitive information or performing malicious actions on behalf of the user. This vulnerability has a moderate severity rating and is identified by the Common Weakness Enumeration (CWE) ID 20.
How To Fix
Latest published version: 3.3.0 as of 22 Oct 2026
pip install --upgrade "python-bugzilla==3.3.0"Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
0.9.0
This is the first release that contains the fix.
pip install --upgrade "python-bugzilla==0.9.0"Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is recommended to update to the latest version of python-bugzilla as soon as possible.
Conclusion
The vulnerability in python-bugzilla that allows for improper validation of X.509 certificates can be mitigated by upgrading to version 0.9.0 or later. It is crucial for users of python-bugzilla to promptly update their installations to ensure the security and integrity of their Bugzilla interactions. For further support and assistance in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for python-bugzilla →
FAQ
python-bugzilla is a Python library for interacting with Bugzilla bug tracking system programmatically.
X.509 certificate validation is the process of verifying the authenticity and integrity of a digital certificate issued by a trusted certificate authority.
A man-in-the-middle attack is a type of cyber attack where an attacker intercepts and alters communication between two parties without their knowledge.
The potential consequences of this vulnerability include unauthorized access to sensitive information, data manipulation, and impersonation of the Bugzilla server.
Yes, the vulnerability can be fixed by upgrading to python-bugzilla version 0.9.0 or later.
