CVE-2015-3886 in libinfinity
Summary
by MITRE
libinfinity before 0.6.6-1 does not validate expired SSL certificates, which allows remote attackers to have unspecified impact via unknown vectors.
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Analysis
by VulDB Data Team • 12/13/2022
The vulnerability identified as CVE-2015-3886 affects libinfinity versions prior to 0.6.6-1, representing a critical security flaw in SSL certificate validation mechanisms. This library serves as a foundation for collaborative editing applications and real-time communication systems, making the absence of proper certificate validation particularly concerning for environments requiring secure data transmission. The flaw resides in the library's failure to properly validate SSL certificates, specifically those that have expired, creating potential attack vectors for malicious actors seeking to compromise secure communications.
This vulnerability stems from inadequate certificate validation logic within the libinfinity library, which should normally verify certificate expiration dates, issuer authenticity, and other security parameters before establishing secure connections. The technical implementation lacks proper checks that would normally be enforced by standard SSL/TLS libraries, allowing connections to proceed even when certificates have expired or otherwise failed validation criteria. This type of flaw aligns with CWE-295, which specifically addresses improper certificate validation, and represents a fundamental breakdown in the security architecture that should be maintained during secure communication establishment. The vulnerability creates a pathway for man-in-the-middle attacks where attackers can exploit the weak certificate validation to intercept or manipulate communications without detection.
The operational impact of this vulnerability extends beyond simple certificate expiration issues, as it enables attackers to potentially establish fraudulent connections with legitimate systems. Remote attackers can exploit this weakness to perform various malicious activities including data interception, session hijacking, or even complete system compromise depending on the nature of the applications using the vulnerable library. The unspecified impact mentioned in the CVE description suggests that the consequences could range from data leakage to complete service disruption, making this vulnerability particularly dangerous in production environments where secure communications are paramount. The attack surface is broad since any application relying on libinfinity for secure communication could be affected, including collaborative platforms, real-time editing systems, and other applications requiring secure network communication.
Organizations using affected versions of libinfinity should immediately upgrade to version 0.6.6-1 or later to address this vulnerability. System administrators should conduct comprehensive inventory checks to identify all applications utilizing this library and ensure proper patching across all affected systems. The remediation process should include thorough testing of patched applications to ensure that certificate validation functions work correctly without introducing regressions in functionality. Security monitoring should be enhanced to detect potential exploitation attempts, and network segmentation strategies may be necessary to limit the potential impact of successful attacks. Organizations should also review their certificate management policies and implement automated certificate renewal processes to minimize the risk of expiration-related security issues. This vulnerability demonstrates the critical importance of maintaining up-to-date security libraries and proper certificate validation practices, aligning with ATT&CK technique T1566 which covers credential harvesting through various attack vectors including man-in-the-middle scenarios.