CVE-2021-3776 in ShowDoc
Summary
by MITRE • 11/13/2021
showdoc is vulnerable to Cross-Site Request Forgery (CSRF)
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Analysis
by VulDB Data Team • 11/16/2021
The vulnerability identified as CVE-2021-3776 affects showdoc, a documentation management system that is susceptible to Cross-Site Request Forgery attacks. This type of vulnerability represents a serious security weakness that allows attackers to perform unauthorized actions on behalf of authenticated users within the application's context. The flaw resides in the application's failure to properly validate and authenticate request origins, creating an opportunity for malicious actors to exploit user sessions and execute unintended operations without their knowledge or consent.
Cross-Site Request Forgery vulnerabilities typically occur when web applications fail to implement proper anti-CSRF mechanisms such as anti-forgery tokens, origin validation, or referer header checks. In the case of showdoc, the application does not adequately verify that requests originate from legitimate sources within the application itself, making it possible for attackers to craft malicious requests that appear to come from authenticated users. This vulnerability falls under the CWE-352 category, which specifically addresses Cross-Site Request Forgery weaknesses in web applications. The attack vector leverages the trust relationship between the web application and the user's browser, exploiting the fact that browsers automatically include authentication credentials such as cookies with every request to the target domain.
The operational impact of this CSRF vulnerability is significant as it can enable attackers to perform a wide range of malicious activities within the showdoc application. Attackers could potentially modify or delete documentation entries, create new user accounts, change administrative settings, or even escalate privileges within the system. The vulnerability particularly threatens the integrity and confidentiality of documentation data, as unauthorized modifications could lead to information disclosure or the introduction of malicious content. Additionally, if the application allows for sensitive operations such as user management or system configuration changes, the potential for damage increases substantially. The attack requires minimal technical expertise to exploit, making it particularly dangerous in environments where showdoc is used for managing sensitive business or technical documentation.
Mitigation strategies for this CSRF vulnerability should focus on implementing robust anti-CSRF protection mechanisms. The most effective approach involves implementing anti-forgery tokens that are generated for each user session and validated on every state-changing request. These tokens should be unique per session and properly validated server-side before processing any user-initiated operations. Additionally, implementing proper origin validation and referer header checks can provide additional layers of protection. Organizations should also consider implementing Content Security Policy headers to further restrict the sources from which requests can be made. The remediation process should include thorough code review to ensure that all forms and endpoints that modify application state properly implement CSRF protection. According to ATT&CK framework, this vulnerability maps to T1566 which covers Social Engineering techniques, specifically targeting the exploitation of trust relationships. Organizations should also establish proper security testing procedures including automated scanning and manual penetration testing to identify similar vulnerabilities across their web applications. Regular security updates and patches should be applied promptly to address this type of vulnerability and maintain the overall security posture of the documentation management system.