CVE-2007-5616 in Tectia Server
Summary
by MITRE
ssh-signer in SSH Tectia Client and Server 5.x before 5.2.4, and 5.3.x before 5.3.6, on Unix and Linux allows local users to gain privileges via unspecified vectors.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 01/21/2025
The vulnerability identified as CVE-2007-5616 affects SSH Tectia Client and Server versions 5.x prior to 5.2.4 and 5.3.x prior to 5.3.6 on Unix and Linux systems. This issue resides within the ssh-signer component which is responsible for cryptographic signing operations within the SSH infrastructure. The vulnerability represents a local privilege escalation flaw that allows attackers with local system access to elevate their privileges beyond the current user context. The unspecified vectors suggest that the exact technical mechanism enabling privilege escalation has not been fully disclosed in the initial vulnerability report, though such vulnerabilities typically involve improper privilege handling during cryptographic operations or insufficient access controls in the signing process.
The technical nature of this vulnerability aligns with common privilege escalation patterns found in Unix-like systems where components running with elevated privileges fail to properly validate or sanitize input from local users. The ssh-signer component likely operates with higher privileges than normal user processes to perform cryptographic signing functions, but contains flaws in its privilege management or input validation that could be exploited by local attackers. This type of vulnerability falls under the category of local privilege escalation as defined by CWE-269, which specifically addresses the issue of insufficient privileges or improper privilege handling in security-critical components.
The operational impact of this vulnerability is significant for organizations relying on SSH Tectia for their secure communications infrastructure. Local attackers who can execute code on systems running vulnerable versions of SSH Tectia could potentially gain root or administrative privileges, providing them with complete control over the affected systems. This would allow attackers to access sensitive data, modify system configurations, install malicious software, or establish persistent access points within the network. The vulnerability affects both client and server components, meaning that any system running these vulnerable versions could be compromised, whether it serves as an SSH client connecting to other systems or as an SSH server accepting connections from clients.
From an ATT&CK framework perspective, this vulnerability maps to privilege escalation techniques and specifically relates to T1068 which covers "Local Privilege Escalation" and potentially T1548 which addresses "Abuse Elevation Control Mechanism". The attack surface is particularly concerning as it requires only local access to exploit, making it accessible to users who may have legitimate access to systems but could abuse their privileges. Organizations should prioritize patching this vulnerability as it represents a critical security risk that could be exploited by both malicious insiders and external attackers who have gained initial access to systems through other means. The remediation approach involves upgrading to SSH Tectia versions 5.2.4 or 5.3.6 and later, ensuring that all systems running vulnerable versions are updated to prevent exploitation. Additionally, implementing proper access controls and monitoring for unusual privilege-related activities can help detect potential exploitation attempts of this vulnerability.