CVE-2015-0926 in Labtech
Summary
by MITRE
Labtech before 100.237 on Linux uses world-writable permissions for root-executed scripts, which allows local users to gain privileges by modifying a script file.
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Analysis
by VulDB Data Team • 11/04/2024
The vulnerability identified as CVE-2015-0926 represents a critical privilege escalation flaw in Labtech monitoring software versions prior to 100.237 on Linux systems. This issue stems from improper file permission management where root-executed scripts are configured with world-writable permissions, creating a fundamental security weakness that directly enables local users to elevate their privileges. The vulnerability operates under the principle of least privilege violation, where files requiring elevated permissions are improperly configured to allow modification by any user on the system.
The technical flaw manifests when a local attacker exploits the world-writable permissions to modify script files that are executed with root privileges. This creates a classic race condition and privilege escalation vector where malicious code can be injected into the execution path of root processes. The vulnerability specifically affects the Labtech monitoring agent which runs with elevated privileges to perform system monitoring tasks, yet fails to properly secure the script files that are executed in this privileged context. This weakness aligns with CWE-732, which addresses improper privilege management where security-critical files are accessible to unauthorized users.
The operational impact of this vulnerability extends beyond simple privilege escalation as it provides attackers with complete control over the affected system. Once local users gain the ability to modify root-executed scripts, they can inject malicious code that executes with root privileges, potentially leading to full system compromise. This vulnerability is particularly dangerous in multi-user environments where users may not have legitimate access to administrative functions. The attack vector is straightforward and requires minimal technical expertise, making it attractive to both malicious actors and security researchers.
Mitigation strategies for CVE-2015-0926 should focus on immediate permission fixes combined with comprehensive system hardening measures. Organizations must immediately correct the file permissions on all script files executed by root processes, ensuring they are not world-writable and properly restricted to authorized users only. This remediation aligns with the principle of least privilege and follows the ATT&CK framework's privilege escalation tactics where adversaries seek to gain higher-level permissions. System administrators should also implement regular permission audits and monitoring to detect similar misconfigurations. The most effective long-term solution involves updating to Labtech version 100.237 or later, which addresses this specific vulnerability through proper file permission management and enhanced security controls that prevent unauthorized modifications to privileged execution scripts.