CVE-2020-5561 in Tsumiki
Summary
by MITRE
Keijiban Tsumiki v1.15 allows remote attackers to execute arbitrary OS commands via unspecified vectors.
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Analysis
by VulDB Data Team • 05/11/2024
The vulnerability identified as CVE-2020-5561 affects Keijiban Tsumiki version 1.15, a web application that appears to be a bulletin board system or similar content management platform. This designation indicates that the software likely handles user inputs through web interfaces and processes these inputs in ways that could be exploited by malicious actors. The vulnerability falls under the category of command injection, where attackers can manipulate the application to execute arbitrary operating system commands on the server hosting the vulnerable software.
The technical flaw manifests through unspecified vectors that allow remote attackers to bypass normal input validation mechanisms within the application. These unspecified vectors suggest that the vulnerability could be present in multiple input points such as form fields, URL parameters, or API endpoints that process user-supplied data without proper sanitization or encoding. The absence of specific details about the exact attack vectors makes this vulnerability particularly concerning as it could potentially affect various aspects of the application's input handling mechanisms.
From an operational impact perspective, successful exploitation of this command injection vulnerability could enable attackers to gain full control over the affected server, execute malicious code, access sensitive data, modify or delete files, and potentially use the compromised system as a launchpad for further attacks within the network infrastructure. The remote nature of the attack means that threat actors do not require physical access or local network presence to exploit this vulnerability, making it particularly dangerous for publicly accessible web applications.
The vulnerability aligns with CWE-77 which specifically addresses command injection flaws in software systems. This weakness category is classified as a critical security vulnerability that allows attackers to execute arbitrary commands on the underlying operating system. From an adversary perspective, this vulnerability would likely be categorized under the ATT&CK technique T1059.001 which covers command and scripting interpreter execution, making it a valuable target for attackers seeking persistent access or data exfiltration capabilities.
Organizations using Keijiban Tsumiki v1.15 should immediately implement mitigation strategies including updating to the latest available version that addresses this vulnerability, implementing proper input validation and sanitization measures, and deploying web application firewalls to monitor and block suspicious command execution patterns. Additionally, network segmentation and privilege separation should be enforced to limit the potential damage from successful exploitation, while regular security audits and penetration testing can help identify similar vulnerabilities in other applications within the organization's infrastructure.