CVE-2012-5817 in XFire
Summary
by MITRE
Codehaus XFire 1.2.6 and earlier, as used in the Amazon EC2 API Tools Java library and other products, 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 • 02/23/2019
The vulnerability identified as CVE-2012-5817 represents a critical SSL/TLS certificate validation flaw affecting Codehaus XFire versions 1.2.6 and earlier. This weakness resides in the Java-based Amazon EC2 API Tools library and other products that utilize XFire for web service communication. The vulnerability stems from improper implementation of SSL certificate verification mechanisms that fail to enforce hostname validation against the certificate's subject common name or subject alternative name fields. This flaw creates a significant security risk by allowing malicious actors to conduct man-in-the-middle attacks through certificate spoofing, where attackers can present arbitrary valid certificates to establish fraudulent secure connections.
The technical implementation of this vulnerability occurs at the SSL/TLS handshake level where the XFire library performs certificate validation without properly checking whether the server's hostname matches the domain names specified in the certificate's subject alternative name extension or the common name field. According to the CWE (Common Weakness Enumeration) classification, this represents a weakness in cryptographic implementation under CWE-310, specifically related to improper certificate validation. The flaw directly violates industry security standards and best practices for secure communication protocols, as outlined in the NIST SP 800-57 and RFC 5280 specifications for X.509 certificate validation. The absence of hostname verification creates a pathway for attackers to bypass the fundamental security mechanism that ensures clients connect to the intended server rather than an imposter.
The operational impact of CVE-2012-5817 extends beyond simple data interception to encompass complete system compromise potential. Attackers exploiting this vulnerability can establish fraudulent secure connections to target systems, potentially gaining access to sensitive data, credentials, or system resources without detection. The vulnerability affects any application using Codehaus XFire 1.2.6 or earlier versions for SSL/TLS communication, including the Amazon EC2 API Tools which are widely deployed in cloud computing environments. This creates widespread risk across enterprise networks where these libraries might be integrated into various security-critical applications. The vulnerability aligns with ATT&CK technique T1041 by enabling secure channel interception, and T1566 by facilitating credential harvesting through spoofed secure connections. Organizations using affected software may experience data breaches, service disruption, and compliance violations due to the lack of proper certificate validation.
Mitigation strategies for CVE-2012-5817 require immediate action to update or replace affected Codehaus XFire components with versions that properly implement SSL certificate validation. Organizations should upgrade to XFire 1.2.7 or later versions that address the hostname verification flaw, or migrate to alternative libraries that properly implement certificate validation according to RFC 2818 and RFC 6125 standards. System administrators should conduct comprehensive inventory assessments to identify all instances of affected software across the network infrastructure. The implementation of additional security controls such as certificate pinning, network segmentation, and enhanced monitoring of SSL/TLS connections can provide layered protection against exploitation attempts. Security teams should also implement automated vulnerability scanning processes to detect and remediate similar issues in other third-party libraries and applications. Organizations should review their certificate management policies and ensure compliance with industry standards including NIST SP 800-57 and ISO/IEC 15408 for proper certificate validation procedures. Regular security assessments and penetration testing should be conducted to verify that certificate validation mechanisms are properly functioning and that no similar vulnerabilities exist in the organization's software ecosystem.