CVE-2013-1909 in Qpid
Summary
by MITRE
The Python client in Apache Qpid before 2.2 does not verify that the server hostname matches a domain name in the subject s Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.
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Analysis
by VulDB Data Team • 05/17/2021
The vulnerability described in CVE-2013-1909 represents a critical flaw in the Apache Qpid Python client's SSL/TLS certificate validation implementation. This weakness specifically affects versions prior to 2.2 and stems from insufficient hostname verification during SSL handshakes. The vulnerability resides in the client's failure to properly validate that the server's hostname matches either the Common Name field or the Subject Alternative Name fields within the X.509 certificate presented by the server. This oversight creates a significant security gap that directly violates fundamental SSL/TLS security principles and industry best practices.
From a technical perspective, the flaw operates at the certificate validation layer where the Python client should enforce strict hostname matching according to RFC 2818 and RFC 6125 standards. The vulnerability allows attackers to perform man-in-the-middle attacks by presenting any valid SSL certificate that happens to contain a matching hostname in either the CN or SAN fields, regardless of whether that hostname actually corresponds to the legitimate server. This type of validation failure falls under CWE-295, which specifically addresses improper certificate validation and hostname verification in SSL/TLS implementations. The vulnerability essentially removes the cryptographic assurance that the client is communicating with the intended server, making it trivial for attackers to intercept or manipulate communications.
The operational impact of this vulnerability extends beyond simple data interception, as it fundamentally undermines the trust model that SSL/TLS is designed to establish. An attacker positioned between the client and server can easily establish a fake SSL connection using a valid certificate, potentially gaining access to sensitive data, credentials, or control over the communication channel. This vulnerability particularly affects environments where Apache Qpid is used for secure messaging, as it compromises the integrity of the entire messaging infrastructure. The attack vector is relatively simple and does not require advanced cryptographic knowledge, making it accessible to a wide range of threat actors and increasing the potential for successful exploitation.
Organizations using affected versions of Apache Qpid should prioritize immediate remediation through upgrading to version 2.2 or later, which implements proper hostname verification. Additionally, security teams should conduct comprehensive assessments of their Qpid deployments to identify any systems running vulnerable versions. The mitigation strategy should include not only software updates but also network-level monitoring to detect potential man-in-the-middle activity. From an ATT&CK framework perspective, this vulnerability maps to techniques involving credential access through network sniffing and man-in-the-middle attacks, specifically targeting the credential exposure and network sniffing tactics. Organizations should also consider implementing additional security controls such as certificate pinning, network segmentation, and enhanced monitoring to reduce the attack surface and detect potential exploitation attempts.