CVE-2014-0595 in Novell
Summary
by MITRE
/opt/novell/ncl/bin/nwrights in Novell Client for Linux in Novell Open Enterprise Server (OES) 11 Linux SP2 does not properly manage a certain array, which allows local users to obtain the S permission in opportunistic circumstances by leveraging the granting of the F permission by an administrator.
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Analysis
by VulDB Data Team • 12/21/2024
The vulnerability identified as CVE-2014-0595 resides within the Novell Client for Linux component of Novell Open Enterprise Server (OES) 11 Linux SP2, specifically affecting the /opt/novell/ncl/bin/nwrights binary. This flaw represents a critical access control vulnerability that stems from improper array management within the client-side application. The issue manifests when local users exploit a specific privilege escalation path by leveraging existing permissions granted by administrators, ultimately allowing them to obtain S permission levels that should remain restricted.
The technical flaw involves a buffer management error or array handling vulnerability that occurs during the processing of file permissions within the Novell Client environment. When an administrator grants F permission to a user, the system's permission management logic fails to properly validate or restrict subsequent access attempts. This improper array handling creates a condition where local users can manipulate the system's permission framework to escalate their privileges. The vulnerability specifically targets the S permission level which typically represents system-level access or administrative capabilities within Novell's permission model, making it particularly dangerous for local attackers.
The operational impact of this vulnerability extends beyond simple privilege escalation as it provides attackers with potential system-level control within the OES environment. Local users who can successfully exploit this flaw gain access to sensitive system resources and administrative functions that should be restricted to authorized personnel only. This creates a significant risk for organizations relying on Novell OES for their network infrastructure, as compromised local accounts could lead to complete system takeover. The opportunistic nature of the exploit means that attackers do not require complex attack vectors or external network access, making the vulnerability particularly concerning for environments where local security controls are paramount.
Organizations should implement immediate mitigations including patching the affected Novell Client for Linux component to address the array management flaw. System administrators should also review and tighten local user permission policies, ensuring that F permissions are granted only to users who absolutely require such access. The vulnerability aligns with CWE-129, which addresses improper validation of array index values, and represents a classic example of privilege escalation through improper access control mechanisms. From an ATT&CK framework perspective, this vulnerability maps to privilege escalation techniques and could be leveraged as part of broader attack chains targeting enterprise network infrastructure. Regular security auditing of local user permissions and system binaries should be conducted to identify similar vulnerabilities that could be exploited to achieve unauthorized system access.
This vulnerability demonstrates the critical importance of proper input validation and access control implementation in enterprise client software. The flaw represents a fundamental breakdown in the security model of the Novell Client for Linux, where improper array management leads to unauthorized privilege escalation. Organizations should consider implementing additional security controls such as mandatory access controls, privilege separation, and enhanced monitoring of local system access to mitigate the risk of similar vulnerabilities. The incident underscores the need for comprehensive security testing of client-side applications, particularly those handling sensitive permission management functions.