CVE-2019-5987 in Access Analysis CGI An-Analyzer
Summary
by MITRE
Access analysis CGI An-Analyzer released in 2019 June 24 and earlier allows remote authenticated attackers to execute arbitrary OS commands via the Management Page.
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Analysis
by VulDB Data Team • 03/19/2024
The vulnerability identified as CVE-2019-5987 affects the Access Analysis CGI An-Analyzer software version released on or before June 24, 2019. This security flaw represents a critical command injection vulnerability that exists within the management interface of the application. The affected system operates as a network access analysis tool designed to monitor and analyze network traffic patterns, making it a potentially valuable target for malicious actors seeking to compromise network infrastructure. The vulnerability specifically resides in the management page component of the software, which handles administrative functions and user access controls.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the management interface. When authenticated users interact with the management page, the application fails to properly sanitize user-supplied input before incorporating it into system commands. This allows an authenticated attacker to inject malicious command sequences that get executed with the privileges of the web application process. The vulnerability falls under CWE-77 which specifically addresses command injection flaws, where user-controllable data is directly passed to operating system commands without proper validation or escaping mechanisms. The attack vector requires authentication, meaning that an attacker must first obtain valid credentials to exploit this vulnerability, but once authenticated, the impact can be severe.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with arbitrary command execution capabilities on the underlying operating system. This means that an authenticated attacker could potentially gain complete control over the server running the An-Analyzer application, allowing them to access sensitive network data, modify system configurations, install malicious software, or even use the compromised system as a pivot point to attack other network resources. The vulnerability creates a persistent backdoor that could remain undetected for extended periods, especially in environments where network monitoring tools are used to detect unusual traffic patterns. This represents a significant risk to network security operations and could compromise the integrity of the entire network monitoring infrastructure.
Organizations affected by this vulnerability should implement immediate mitigations including applying the vendor-provided patches released after June 24, 2019, which would contain proper input validation and sanitization measures. Network segmentation and access control measures should be strengthened to limit the scope of potential compromise, ensuring that only authorized personnel can access the management interface. Additionally, implementing network monitoring solutions that can detect command injection attempts and unusual system command execution patterns would provide additional layers of defense. The vulnerability aligns with ATT&CK technique T1059 which covers command and scripting interpreter, and specifically targets the execution of malicious commands through web application interfaces. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other network management tools and systems that may present similar attack surfaces.