CVE-2001-1577 in OpenUnix
Summary
by MITRE
Unknown vulnerability in CDE in Caldera OpenUnix 7.1.0, 7.1.1, and 8.0 allows an xterm session to gain privileges when the session is reused.
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Analysis
by VulDB Data Team • 06/06/2018
The vulnerability identified as CVE-2001-1577 represents a critical privilege escalation flaw within the Common Desktop Environment CDE of Caldera OpenUnix operating systems. This issue affects versions 7.1.0, 7.1.1, and 8.0, where the xterm session management mechanism contains a design flaw that permits unauthorized privilege elevation during session reuse operations. The vulnerability stems from inadequate privilege checking mechanisms within the desktop environment's session handling processes, creating a pathway for malicious users to exploit the system's security model.
The technical implementation of this vulnerability occurs when a user creates an xterm session and subsequently reuses that session without proper authentication or privilege verification. The flaw exists in the way CDE manages session persistence and access controls, particularly when the system attempts to restore or reactivate existing terminal sessions. During this reuse process, the system fails to properly validate whether the requesting user maintains appropriate authorization levels, allowing a lower-privileged user to potentially inherit elevated privileges from the original session. This represents a classic case of insufficient access control validation within a desktop environment framework, with the vulnerability classified under CWE-284 Access Control.
The operational impact of CVE-2001-1577 extends beyond simple privilege escalation, as it can enable attackers to gain unauthorized access to system resources, modify critical files, and potentially establish persistent access to the compromised system. The vulnerability is particularly dangerous in multi-user environments where users may share terminal sessions or where session management is not properly secured. Attackers can exploit this weakness to bypass traditional security controls and gain unauthorized access to system functions that should be restricted to privileged users. The flaw affects the fundamental security model of the desktop environment, undermining the trust model that users expect from their operating system.
Mitigation strategies for this vulnerability involve immediate patching of the affected CDE components, proper configuration of session management policies, and implementation of additional access controls. System administrators should ensure that all affected OpenUnix systems are updated with the latest security patches provided by Caldera or through third-party vendors. The xterm session reuse functionality should be configured with strict authentication requirements, and session timeouts should be implemented to minimize the window of opportunity for exploitation. Additionally, monitoring and logging of session management activities should be enhanced to detect potential exploitation attempts. This vulnerability aligns with ATT&CK technique T1068 Privilege Escalation through session management flaws and should be addressed as part of comprehensive system hardening efforts. The risk assessment for this vulnerability should consider the potential for lateral movement within the network and the possibility of establishing persistent backdoors through the elevated privileges gained.