CVE-2007-0669 in Twiki
Summary
by MITRE
Unspecified vulnerability in Twiki 4.0.0 through 4.1.0 allows local users to execute arbitrary Perl code via unknown vectors related to CGI session files.
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Analysis
by VulDB Data Team • 11/25/2024
The vulnerability identified as CVE-2007-0669 represents a critical security flaw in Twiki versions 4.0.0 through 4.1.0 that enables local attackers to execute arbitrary Perl code through unspecified vectors associated with CGI session files. This type of vulnerability falls under the category of code injection attacks and demonstrates a fundamental weakness in how the application handles session management and user input processing. The unspecified nature of the exact attack vectors makes this vulnerability particularly dangerous as it may encompass multiple exploitation pathways that security professionals must consider when assessing system risk. The vulnerability exists within the CGI session file handling mechanisms, which suggests that the application's session management system fails to properly validate or sanitize data before processing it as executable code. This weakness allows local users to manipulate session files in such a way that they can inject and subsequently execute arbitrary Perl code on the affected system.
The technical implementation of this vulnerability stems from improper input validation and sanitization within Twiki's session handling subsystem. When CGI session files are created or modified, the application likely processes user-supplied data without adequate security controls to prevent code injection attempts. This flaw aligns with CWE-94, which describes "Improper Control of Generation of Code ('Code Injection')" and represents a classic example of how session management can become a vector for privilege escalation and code execution. The local user requirement indicates that attackers must already have access to the system, but this access level is still concerning as it allows for potential privilege escalation from a local account to system-level execution. The vulnerability specifically targets the Perl interpreter within the Twiki environment, suggesting that session files may be processed using Perl's eval function or similar code execution mechanisms without proper sanitization of input data.
The operational impact of CVE-2007-0669 extends beyond simple code execution as it provides attackers with the capability to manipulate the entire Twiki application environment. Local users who exploit this vulnerability can potentially gain access to sensitive data stored within Twiki, modify content, or even escalate privileges to system administrators. The attack surface is particularly concerning in environments where Twiki is used for collaborative content management, as session files may contain authentication tokens or other sensitive information that could be exploited for unauthorized access. This vulnerability also demonstrates the importance of proper session management in web applications, as it allows attackers to manipulate session files in ways that bypass normal access controls. The potential for data corruption or complete system compromise increases significantly when local users can execute arbitrary code on the system hosting Twiki.
Mitigation strategies for CVE-2007-0669 focus primarily on upgrading to patched versions of Twiki where the session file handling has been properly secured. Organizations should immediately update to Twiki versions that address this vulnerability, as no effective workarounds exist for the affected versions. Security measures should include implementing proper input validation and sanitization for all session-related data, ensuring that session files are properly secured with appropriate file permissions, and monitoring for unauthorized modifications to session directories. The vulnerability highlights the need for defense-in-depth strategies, including regular security assessments of web applications, proper file system access controls, and monitoring for suspicious activity in session management directories. Additionally, implementing application whitelisting and code execution restrictions can provide additional protection layers. Organizations should also consider using automated tools to scan for vulnerable applications and ensure that all web-based content management systems are kept up to date with the latest security patches, as this vulnerability represents a classic example of how outdated software can provide attackers with persistent access vectors. The ATT&CK framework would categorize this vulnerability under privilege escalation techniques, specifically targeting the execution of arbitrary code through application-specific weaknesses in session management processes.