CVE-2005-2205 in pngren
Summary
by MITRE
The ReadLog function in kaiseki.cgi in pngren allows remote attackers to execute arbitrary commands via shell metacharacters in the query string.
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Analysis
by VulDB Data Team • 07/10/2018
The vulnerability identified as CVE-2005-2205 represents a critical command injection flaw within the kaiseki.cgi script of the pngren application. This issue resides in the ReadLog function which processes user input from query strings without proper sanitization or validation. The vulnerability stems from the application's failure to properly escape or filter shell metacharacters that are passed through the HTTP query parameters, creating an avenue for remote attackers to execute arbitrary system commands on the affected server.
This command injection vulnerability operates at the application layer and demonstrates a classic lack of input validation and output encoding practices. The flaw allows attackers to append malicious shell commands to the query string, which are then interpreted and executed by the underlying operating system through the vulnerable kaiseki.cgi script. The attack vector is particularly dangerous because it requires no authentication and can be executed through standard web browser requests, making it highly accessible to remote threat actors.
From a technical perspective, this vulnerability aligns with CWE-77 which categorizes improper neutralization of special elements used in a command. The vulnerability also maps to ATT&CK technique T1059.001 for command and scripting interpreter, specifically targeting the execution of system commands through web interfaces. The impact of this flaw extends beyond simple command execution as it can potentially allow attackers to gain full control over the affected server, escalate privileges, or use the compromised system as a launch point for further attacks within the network infrastructure.
The operational implications of CVE-2005-2205 are severe and multifaceted. Successful exploitation can result in complete system compromise, data exfiltration, or the establishment of persistent backdoors. Attackers may leverage this vulnerability to install malware, modify system files, or use the compromised server for launching attacks against other systems. The vulnerability also poses risks to data confidentiality and integrity, as unauthorized users can access or manipulate sensitive information stored on the server. Additionally, this flaw can be exploited as part of larger attack campaigns where compromised systems are used for botnet operations or as pivoting points for lateral movement within network environments.
Mitigation strategies for this vulnerability should include immediate patching of the affected pngren application to properly sanitize all user input and implement proper command escaping mechanisms. Organizations should deploy web application firewalls to monitor and filter malicious query strings containing shell metacharacters. Input validation and output encoding should be implemented at multiple layers including application code, database interactions, and network-level protections. Regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other applications. System administrators should also implement principle of least privilege configurations and monitor system logs for suspicious command execution patterns. The vulnerability highlights the critical importance of secure coding practices and proper input validation as outlined in OWASP Top Ten and ISO 27001 security standards for preventing such injection attacks.