CVE-2023-6056 in Total Security
Summary
by MITRE • 10/18/2024
A vulnerability has been discovered in Bitdefender Total Security HTTPS scanning functionality that results in the improper trust of self-signed certificates. The product is found to trust certificates signed with the RIPEMD-160 hashing algorithm without proper validation, allowing an attacker to establish MITM SSL connections to arbitrary sites.
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Analysis
by VulDB Data Team • 10/18/2024
The vulnerability identified as CVE-2023-6056 represents a critical flaw in Bitdefender Total Security's HTTPS scanning mechanism that fundamentally undermines secure communication protocols. This weakness resides in the software's certificate validation process where it improperly extends trust to certificates utilizing the RIPEMD-160 hashing algorithm without adequate cryptographic validation checks. The issue manifests specifically within the product's handling of self-signed certificates, creating a pathway for malicious actors to exploit the trust relationship and establish man-in-the-middle attacks against arbitrary websites. The vulnerability directly impacts the core security functionality that Bitdefender provides to protect users from malicious network traffic, effectively neutralizing the protection mechanisms designed to detect and prevent such attacks.
From a technical perspective, the flaw stems from the product's failure to properly validate cryptographic algorithms during certificate trust establishment. RIPEMD-160, while historically used in various cryptographic applications, has been deprecated in modern security standards due to known weaknesses and insufficient collision resistance. The vulnerability allows attackers to generate self-signed certificates using this weak hashing algorithm and have them accepted by Bitdefender's security stack, bypassing the intended certificate validation process. This represents a clear violation of cryptographic best practices and security protocol compliance, as the system fails to enforce proper algorithm strength requirements that would normally prevent such weak cryptographic signatures from being trusted. The implementation error falls under CWE-327, which addresses the use of weak or broken cryptographic algorithms in security-critical applications.
The operational impact of this vulnerability extends far beyond simple certificate acceptance issues, as it fundamentally compromises the integrity of secure communications within the protected network environment. An attacker exploiting this vulnerability can establish transparent man-in-the-middle connections to any website, potentially intercepting sensitive data including login credentials, personal information, and financial transactions. The attack vector is particularly concerning because it leverages the very functionality that users trust to protect them from such threats, creating a dangerous paradox where the security tool becomes a potential attack surface. This vulnerability affects not only individual users but also enterprise environments where Bitdefender Total Security is deployed, potentially exposing entire networks to unauthorized access and data interception. The impact aligns with ATT&CK technique T1566, which covers credential harvesting through phishing and man-in-the-middle attacks, while also supporting T1041 for data exfiltration through network traffic interception.
Organizations should immediately implement mitigations including disabling HTTPS scanning functionality within Bitdefender Total Security until a patched version is available, and monitoring network traffic for signs of man-in-the-middle activity. System administrators should also consider implementing additional network-level security controls such as certificate pinning and enhanced network monitoring to detect potential exploitation attempts. The vulnerability demonstrates the critical importance of proper cryptographic validation in security software and highlights the need for comprehensive security testing of cryptographic implementations. Users should be advised to avoid accessing sensitive websites while the vulnerability exists, and organizations should prioritize updating to the patched version of Bitdefender Total Security as soon as it becomes available. The incident serves as a reminder of the potential for security tools to inadvertently create attack vectors when proper cryptographic validation is not enforced, emphasizing the need for rigorous security testing and validation of all cryptographic components within security software stacks.