CVE-2013-2191 in openSUSE
Summary
by MITRE
python-bugzilla before 0.9.0 does not validate X.509 certificates, which allows man-in-the-middle attackers to spoof Bugzilla servers via a crafted certificate.
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Analysis
by VulDB Data Team • 12/27/2024
The vulnerability identified as CVE-2013-2191 affects the python-bugzilla library version 0.9.0 and earlier, presenting a critical security flaw in the certificate validation process. This issue stems from the library's failure to properly validate X.509 certificates when establishing secure connections to Bugzilla servers. The absence of certificate validation creates a significant attack surface that enables malicious actors to perform man-in-the-middle attacks by presenting forged certificates that appear legitimate to the client application. The vulnerability directly impacts the integrity and authenticity guarantees that SSL/TLS connections are supposed to provide, undermining the fundamental security assumptions of encrypted communications between the python-bugzilla client and Bugzilla servers. This flaw exists at the core of the library's network security implementation, where proper certificate verification should occur but fails to do so.
The technical implementation flaw manifests in the library's handling of secure socket connections where X.509 certificate validation is either completely omitted or inadequately implemented. When a python-bugzilla client attempts to establish a secure connection to a Bugzilla server, the library should verify that the server's certificate is issued by a trusted certificate authority, that it matches the server's hostname, and that it has not been revoked or tampered with. However, in versions prior to 0.9.0, this validation process is bypassed or fails to execute properly, allowing attackers to present malicious certificates that the client accepts without question. This vulnerability is classified under CWE-295 which specifically addresses "Improper Certificate Validation" and represents a direct violation of secure communication protocols. The flaw essentially transforms what should be a secure encrypted channel into a potentially compromised pathway where attackers can intercept, modify, or redirect communications.
The operational impact of this vulnerability extends beyond simple certificate validation failure to encompass broader security implications for organizations relying on python-bugzilla for Bugzilla server interactions. Attackers exploiting this vulnerability can impersonate legitimate Bugzilla servers, potentially gaining access to sensitive issue tracking data, user credentials, or system configuration information. The consequences include unauthorized access to bug tracking systems, data exfiltration, and potential privilege escalation within the affected environments. This vulnerability affects any organization that uses python-bugzilla to interact with Bugzilla servers, particularly those in development environments where secure communication with issue tracking systems is critical. The impact is amplified when considering that many development teams rely on Bugzilla for managing security vulnerabilities, code reviews, and project tracking, making the compromise of these systems potentially devastating. The vulnerability also represents a violation of the principle of least privilege and can enable attackers to manipulate the software development lifecycle by tampering with bug reports or system configurations.
Organizations affected by this vulnerability should immediately upgrade to python-bugzilla version 0.9.0 or later, which implements proper X.509 certificate validation. Additional mitigations include implementing network-level controls such as certificate pinning where possible, monitoring for unusual network traffic patterns, and ensuring that all communication channels are properly secured. Security teams should also review their incident response procedures to detect potential exploitation attempts and implement proper logging of all Bugzilla server interactions. The vulnerability highlights the importance of maintaining up-to-date security libraries and the critical need for proper certificate validation in all secure communication implementations. Organizations should also consider implementing network segmentation and monitoring to detect unauthorized certificate modifications or man-in-the-middle attacks. This vulnerability serves as a reminder of the critical importance of secure coding practices and the potential consequences of inadequate security controls in client-side applications that interact with remote servers. The ATT&CK framework categorizes this as a credential access technique through network sniffing and man-in-the-middle attacks, emphasizing the need for robust certificate validation as a foundational security control.