CVE-2020-5615 in Calendar01
Summary
by MITRE
Cross-site request forgery (CSRF) vulnerability in [Calendar01] free edition ver1.0.0 and [Calendar02] free edition ver1.0.0 allows remote attackers to hijack the authentication of administrators via unspecified vectors.
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Analysis
by VulDB Data Team • 08/04/2020
The vulnerability identified as CVE-2020-5615 represents a critical cross-site request forgery flaw affecting two separate calendar applications, Calendar01 and Calendar02, both at version 1.0.0 in their free editions. This CSRF vulnerability exposes administrative accounts to unauthorized access attempts by allowing remote attackers to manipulate authenticated sessions through unspecified attack vectors. The flaw fundamentally undermines the security model of these applications by enabling attackers to perform administrative actions without proper authorization, potentially leading to complete system compromise.
The technical implementation of this vulnerability stems from insufficient validation of request origins and lack of proper anti-CSRF token mechanisms within the application's authentication flow. When administrators interact with the calendar applications, the system fails to adequately verify that requests originate from legitimate sources, creating an exploitable condition where malicious actors can craft requests that appear to come from authenticated users. This weakness aligns with CWE-352, which specifically addresses Cross-Site Request Forgery vulnerabilities in web applications. The vulnerability operates at the application layer and can be exploited through various methods including crafted web pages, malicious email attachments, or compromised third-party websites that embed malicious requests.
The operational impact of this vulnerability is severe and multifaceted, particularly given that it targets administrator accounts. Successful exploitation could enable attackers to perform critical administrative functions such as user account manipulation, system configuration changes, data deletion, or privilege escalation within the calendar applications. The remote nature of the attack means that threat actors do not require physical access or network proximity to exploit the vulnerability, making it particularly dangerous in environments where these calendar applications are deployed. This vulnerability directly impacts the integrity and confidentiality of the calendar systems, potentially exposing sensitive scheduling data and user information to unauthorized access.
Organizations utilizing these calendar applications should immediately implement mitigation strategies including the deployment of anti-CSRF tokens for all state-changing requests, implementation of proper origin validation mechanisms, and enforcement of secure session management practices. The application should be updated to the latest available versions that address this vulnerability, as the free editions are likely to have limited security updates. Security measures should also include web application firewalls that can detect and block suspicious cross-site requests, network segmentation to limit access to administrative functions, and comprehensive monitoring of authentication and administrative activities. This vulnerability also relates to ATT&CK technique T1566, which covers phishing and social engineering attacks that leverage CSRF vulnerabilities to gain unauthorized access to privileged accounts. Organizations should conduct immediate security assessments to identify and remediate similar vulnerabilities across their entire application portfolio, as CSRF flaws often indicate broader security weaknesses in web application architectures.