CVE-2022-4018 in rdiffweb
Summary
by MITRE • 11/16/2022
Missing Authentication for Critical Function in GitHub repository ikus060/rdiffweb prior to 2.5.0a6.
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Analysis
by VulDB Data Team • 03/09/2026
The vulnerability identified as CVE-2022-4018 represents a critical authentication flaw within the rdiffweb repository management system developed by ikus060. This issue affects versions prior to 2.5.0a6 and specifically targets the authentication mechanisms that protect critical functions within the application. The vulnerability stems from insufficient verification of user credentials before granting access to essential administrative and operational capabilities. The missing authentication check creates a pathway for unauthorized individuals to exploit the system's core functionalities without proper authorization, fundamentally compromising the security posture of the repository management environment.
This authentication bypass vulnerability operates at the core of application security principles and aligns with CWE-287 which addresses improper authentication issues. The flaw allows attackers to perform critical operations such as repository management, user administration, and system configuration changes without undergoing proper authentication processes. The technical implementation appears to lack proper session validation and access control checks for functions that should be restricted to authenticated administrators. This weakness enables attackers to manipulate the application's behavior through unauthorized access to administrative interfaces and functions that are typically protected by robust authentication mechanisms.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass potential data compromise, system integrity violations, and unauthorized modifications to repository configurations. Attackers could exploit this flaw to gain complete administrative control over the rdiffweb instance, potentially leading to data exfiltration, repository corruption, or the installation of malicious code within the system. The vulnerability particularly affects organizations that rely on rdiffweb for version control and backup management, as it undermines the fundamental security assumptions of the system. The risk is amplified when considering that repository management systems often contain sensitive organizational data, making this vulnerability particularly attractive to threat actors seeking persistent access to critical infrastructure.
Mitigation strategies for CVE-2022-4018 should prioritize immediate deployment of the patched version 2.5.0a6 or later, which addresses the missing authentication checks for critical functions. Organizations should also implement additional security controls including network segmentation, monitoring of unauthorized access attempts, and regular security assessments of their repository management systems. The vulnerability demonstrates the critical importance of proper access control implementation and serves as a reminder of the necessity for comprehensive authentication testing in security-critical applications. Security teams should conduct thorough reviews of all administrative interfaces and ensure that proper authentication mechanisms are in place before granting access to functions that could impact system integrity or data security. This vulnerability also highlights the importance of adhering to security frameworks such as those outlined in the mitre attack matrix where authentication bypasses represent common initial access vectors for more sophisticated attacks.