CVE-2005-2770 in WRQ Reflection for Secure IT Windows Server
Summary
by MITRE
WRQ Reflection for Secure IT Windows Server 6.0 (formerly known as F-Secure SSH server) does not properly handle when the Windows Administrator or Guest accounts are renamed after SSH key authentication has been configured, which allows remote attackers to use the original names during login.
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Analysis
by VulDB Data Team • 07/19/2024
The vulnerability identified as CVE-2005-2770 affects WRQ Reflection for Secure IT Windows Server 6.0, formerly known as F-Secure SSH server, presenting a significant authentication flaw that undermines the security of remote access systems. This issue stems from the software's inadequate handling of Windows account renaming operations, specifically concerning the Administrator and Guest accounts that are commonly configured for SSH key authentication. The flaw represents a classic case of improper privilege management and account handling within secure communication frameworks, creating a persistent security weakness that persists even after system administrators have taken steps to enhance security through account renaming.
The technical implementation of this vulnerability occurs when the Windows Administrator or Guest accounts are renamed after SSH key authentication has been configured within the WRQ Reflection server environment. The system fails to update its internal authentication mechanisms to recognize the new account names, maintaining references to the original names in its credential handling processes. This creates a scenario where attackers can exploit the system by using the old account names during login attempts, effectively bypassing the intended security measures that would normally prevent access through renamed accounts. The flaw operates at the authentication layer of the SSH protocol implementation, where account name resolution and validation mechanisms are not properly synchronized with Windows account management operations.
The operational impact of this vulnerability extends beyond simple credential bypass, creating potential attack vectors that could lead to unauthorized system access and privilege escalation. Attackers can leverage this weakness to gain access to systems where administrators have attempted to enhance security by renaming default accounts, thereby neutralizing the security benefit of such administrative practices. The vulnerability particularly affects environments where security hardening procedures include renaming default accounts to reduce attack surface, making it especially problematic for organizations implementing standard security baselines. This weakness can result in complete system compromise when combined with other vulnerabilities or when the renamed accounts still maintain elevated privileges.
Security professionals should recognize this vulnerability as a variant of improper authentication handling and account management issues that align with CWE-287, which addresses improper authentication scenarios in security systems. The flaw also relates to ATT&CK technique T1078 which covers valid accounts as a means of gaining access to systems, where attackers can exploit the persistent authentication references to maintain unauthorized access. Mitigation strategies should include immediate patching of the WRQ Reflection server software to address the account renaming handling issue, along with implementing comprehensive monitoring for account renaming operations and their impact on authentication systems. Organizations should also consider implementing additional authentication controls such as multi-factor authentication, regular security audits of account configurations, and ensuring that all authentication systems properly synchronize with Windows account management processes. The vulnerability underscores the importance of maintaining consistency between operating system account management and third-party security applications, particularly in environments where security hardening practices are implemented.