CVE-2007-1397 in FiSH
Summary
by MITRE
Multiple stack-based buffer overflows in the (1) ExtractRnick and (2) decrypt_topic_332 functions in FiSH allow remote attackers to execute arbitrary code via long strings.
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Analysis
by VulDB Data Team • 01/12/2025
The vulnerability identified as CVE-2007-1397 represents a critical security flaw in the FiSH IRC client plugin that enables remote code execution through stack-based buffer overflows. This vulnerability affects two distinct functions within the software ecosystem, specifically the ExtractRnick and decrypt_topic_332 functions, creating multiple attack vectors for malicious actors seeking to compromise systems. The flaw stems from inadequate input validation and memory management practices that fail to properly constrain string lengths during processing, allowing attackers to overflow stack buffers and potentially execute arbitrary code with the privileges of the affected application. The vulnerability manifests when the FiSH plugin processes specially crafted input strings that exceed the allocated buffer space, leading to memory corruption that can be exploited to gain unauthorized access to systems. According to CWE classification, this vulnerability maps to CWE-121 stack-based buffer overflow, which is a well-documented weakness in software development practices that directly violates secure coding principles and industry standards for memory safety. The attack surface is particularly concerning as it allows remote exploitation without requiring authentication, making it a significant threat to IRC networks where the FiSH plugin is deployed. The operational impact extends beyond simple code execution, as successful exploitation can lead to complete system compromise, data theft, or use as a foothold for further attacks within network environments. This vulnerability specifically targets the cryptographic functions within FiSH that handle IRC protocol communication, making it particularly dangerous in environments where secure communication is expected. The presence of multiple vulnerable functions increases the likelihood of successful exploitation and reduces the effectiveness of simple patching approaches that might only address one of the affected code paths. Attackers can leverage this vulnerability to inject malicious code that executes in the context of the IRC client, potentially leading to unauthorized access to chat sessions, data interception, or use of the compromised system for further malicious activities. The vulnerability's remote exploitability means that attackers do not need physical access to target systems, significantly expanding the potential attack surface and making it particularly dangerous in networked environments where IRC communications are common. Organizations using FiSH plugins in their IRC infrastructure face significant risk without immediate remediation, as the vulnerability can be exploited by anyone with network access to the affected systems. The technical nature of the flaw demonstrates a fundamental lack of proper bounds checking and input sanitization within the cryptographic processing components of the software, representing a failure to implement proper secure coding practices that are mandated by security frameworks such as the OWASP Top Ten and NIST cybersecurity guidelines. This vulnerability exemplifies the importance of thorough code review and security testing, particularly for cryptographic implementations where memory safety is paramount to preventing exploitation. The exploitability characteristics align with ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation would enable attackers to execute arbitrary commands on compromised systems. Mitigation strategies must include immediate patching of the FiSH plugin to address both vulnerable functions, implementation of network monitoring to detect potential exploitation attempts, and consideration of alternative IRC security mechanisms that do not rely on vulnerable cryptographic implementations. The vulnerability underscores the critical need for regular security assessments of third-party plugins and components, particularly those handling cryptographic operations or processing untrusted input from network communications. System administrators should also implement network segmentation and access controls to limit the potential impact of successful exploitation, while monitoring for unusual IRC protocol behavior that might indicate exploitation attempts.