CVE-2005-1145 in CalendarScript
Summary
by MITRE
** DISPUTED ** NOTE: this issue has been disputed by the vendor. Cross-site scripting (XSS) vulnerability in calendar.pl in CalendarScript 3.20 allows remote attackers to inject arbitrary web script or HTML via the template parameter, a different vulnerability than CVE-2005-1146.
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Analysis
by VulDB Data Team • 08/08/2024
The vulnerability described in CVE-2005-1145 represents a cross-site scripting weakness found in CalendarScript version 3.20's calendar.pl component. This issue falls under the category of web application security flaws that specifically target the manipulation of user input through web interfaces. The vulnerability is particularly concerning because it allows remote attackers to execute malicious scripts within the context of other users' browsers, potentially compromising user sessions and data integrity. The disputed nature of this CVE by the vendor suggests there may be disagreements regarding the severity classification or the specific conditions under which the vulnerability can be exploited.
The technical flaw manifests through improper input validation and sanitization within the calendar.pl script when processing the template parameter. When users interact with the calendar application, the template parameter is not adequately filtered or escaped, creating an opportunity for attackers to inject malicious HTML or JavaScript code. This injection occurs because the application fails to properly encode or validate user-supplied data before incorporating it into web page responses. The vulnerability operates at the application layer where user input directly influences the output generation process, making it a classic example of input validation failure that enables code injection attacks.
From an operational impact perspective, this XSS vulnerability could enable attackers to perform various malicious activities including session hijacking, credential theft, data exfiltration, and defacement of calendar content. An attacker could craft malicious URLs with script payloads that would execute in the browsers of unsuspecting users who visit the compromised calendar application. This type of vulnerability particularly affects collaborative environments where calendar applications are used for scheduling meetings, sharing sensitive information, and managing organizational activities. The exploitation could lead to unauthorized access to calendar data, modification of event entries, and potential escalation to broader system compromise through session manipulation.
Security professionals should consider this vulnerability in relation to CWE-79 which specifically addresses cross-site scripting flaws in web applications. The ATT&CK framework categorizes this type of vulnerability under the 'Command and Control' and 'Credential Access' phases where adversaries establish persistent access through web-based attack vectors. Organizations should implement proper input validation mechanisms, output encoding, and content security policies to mitigate such vulnerabilities. The disputed status of this CVE by the vendor indicates that proper remediation procedures should be carefully evaluated, but the underlying security principle of validating and sanitizing all user inputs remains critical for preventing XSS attacks in web applications.