CVE-2023-39416 in Standard Edition
Summary
by MITRE • 08/18/2023
Proself Enterprise/Standard Edition Ver5.61 and earlier, Proself Gateway Edition Ver1.62 and earlier, and Proself Mail Sanitize Edition Ver1.07 and earlier allow a remote authenticated attacker with an administrative privilege to execute arbitrary OS commands.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 09/13/2023
This vulnerability represents a critical command injection flaw affecting multiple editions of the Proself security appliance line. The vulnerability exists in versions 5.61 and earlier of Proself Enterprise and Standard Edition, 1.62 and earlier of Proself Gateway Edition, and 1.07 and earlier of Proself Mail Sanitize Edition. The flaw allows authenticated attackers with administrative privileges to execute arbitrary operating system commands remotely, effectively providing complete system compromise capabilities. This represents a severe privilege escalation vulnerability that transforms administrative access into full system control, enabling attackers to manipulate, exfiltrate, or destroy system resources.
The technical implementation of this vulnerability stems from improper input validation and sanitization within the application's command execution mechanisms. When administrative users submit specific inputs through the web interface or API endpoints, the system fails to properly sanitize these inputs before incorporating them into system command invocations. This classic command injection vulnerability (cwe-77) allows attackers to append malicious commands that get executed with the privileges of the web application process, typically running with elevated system permissions. The vulnerability manifests across multiple attack vectors including configuration management interfaces, system monitoring tools, and administrative command execution features.
The operational impact of this vulnerability is profound and far-reaching for organizations utilizing affected Proself appliances. An attacker with administrative credentials can execute arbitrary code on the target system, potentially leading to complete system compromise, data exfiltration, lateral movement within the network, and persistence mechanisms. The vulnerability affects the core security functionality of these appliances, meaning that attackers who gain administrative access can bypass the very security controls these devices are designed to provide. This creates a dangerous scenario where the security infrastructure becomes the attack vector rather than the defense mechanism. Organizations may face regulatory compliance violations, data breaches, and significant operational disruption as a result of exploitation.
Organizations should immediately assess their deployment of affected Proself appliances and prioritize patching or upgrading to versions that address this vulnerability. The recommended mitigation strategy includes implementing network segmentation to limit access to administrative interfaces, enforcing strict access controls and multi-factor authentication for administrative accounts, and monitoring for suspicious command execution patterns. Additionally, organizations should consider deploying web application firewalls to detect and block malicious input patterns that could lead to command injection attacks. This vulnerability aligns with several attack techniques documented in the mitre ATT&CK framework, particularly those related to privilege escalation and command and control operations. Regular security assessments and penetration testing should be conducted to identify and remediate similar input validation weaknesses in other enterprise systems.