CVE-2018-15726 in Secure Desktop
Summary
by MITRE
The Pulse Secure Desktop (macOS) 5.3RX before 5.3R5 and 9.0R1 has a Privilege Escalation Vulnerability.
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Analysis
by VulDB Data Team • 03/21/2020
The Pulse Secure Desktop client for macOS versions 5.3RX prior to 5.3R5 and 9.0R1 contains a critical privilege escalation vulnerability that allows attackers to gain elevated system privileges. This flaw resides within the client application's handling of certain system operations and privilege management mechanisms, creating a pathway for unauthorized users to execute code with administrative rights. The vulnerability affects organizations that rely on Pulse Secure for remote access solutions, potentially exposing their network infrastructure to sophisticated attacks.
This privilege escalation vulnerability stems from inadequate input validation and improper privilege checking within the macOS client application. The flaw occurs when the application processes certain system commands or configuration changes without sufficient authorization verification. Attackers can exploit this by manipulating specific parameters or triggering particular code paths that bypass normal access controls. The vulnerability is classified under CWE-269: Improper Privilege Management, which addresses issues where software fails to properly enforce access control mechanisms. The root cause typically involves the application not properly validating user credentials or system permissions before executing privileged operations, allowing malicious input to be processed with elevated privileges.
The operational impact of this vulnerability extends beyond simple privilege escalation, creating potential for complete system compromise and network infiltration. An attacker who successfully exploits this vulnerability can gain root access to the affected macOS systems, enabling them to install malware, modify system configurations, steal sensitive data, or establish persistent backdoors. Organizations using Pulse Secure for remote access are particularly at risk since the vulnerability allows attackers to operate with administrative privileges on endpoint devices. This creates opportunities for lateral movement within networks, data exfiltration, and establishment of command and control channels. The vulnerability also affects the integrity of the entire remote access infrastructure, as compromised endpoints can serve as launching points for broader attacks against network resources.
Mitigation strategies for this vulnerability require immediate patching of affected Pulse Secure Desktop clients to versions 5.3R5 or 9.0R1, which contain the necessary security fixes. Organizations should also implement network monitoring to detect unusual privilege escalation activities and ensure proper access controls are in place for remote access systems. The remediation process involves updating all affected macOS endpoints and validating that the patches have been successfully applied. Additionally, security teams should conduct comprehensive vulnerability assessments to identify any potential exploitation attempts and implement network segmentation to limit the impact of compromised systems. This vulnerability aligns with several tactics in the MITRE ATT&CK framework, particularly privilege escalation techniques and initial access methods that leverage software vulnerabilities. Organizations should also consider implementing additional security controls such as application whitelisting, mandatory access controls, and regular security audits to reduce the attack surface and prevent exploitation of similar vulnerabilities in the future.