CVE-2006-0180 in Calendars
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in CaLogic Calendars 1.2.2 allows remote attackers to inject arbitrary web script or HTML via the Title field on the "Adding New Event" page, and possibly other vectors, involving iframe tags.
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Analysis
by VulDB Data Team • 01/11/2019
The CVE-2006-0180 vulnerability represents a classic cross-site scripting flaw in the CaLogic Calendars 1.2.2 web application that exposes users to significant security risks through improper input validation. This vulnerability specifically targets the Title field within the "Adding New Event" page functionality, demonstrating how web applications can fail to properly sanitize user-provided data before rendering it in web pages. The flaw allows remote attackers to inject malicious scripts that execute in the context of other users' browsers, creating a persistent threat vector that can compromise user sessions and data integrity. The vulnerability's impact extends beyond just the Title field, as the description indicates potential inclusion of other vectors involving iframe tags, suggesting a broader class of injection points within the application's input handling mechanisms.
The technical nature of this vulnerability aligns with CWE-79, which specifically addresses cross-site scripting vulnerabilities in web applications. This weakness occurs when an application incorporates untrusted data into web pages without proper validation or encoding, allowing attackers to execute malicious scripts in the victim's browser context. The CaLogic Calendars application fails to implement adequate input sanitization measures, particularly for HTML content that could be interpreted by web browsers as executable code rather than plain text. The use of iframe tags in the attack vector indicates that the vulnerability could potentially be exploited to load malicious content from external domains, creating additional attack surface areas that could be leveraged for phishing, credential theft, or other malicious activities.
From an operational perspective, this vulnerability creates severe consequences for organizations using the affected calendar application. When users create events with maliciously crafted titles, any user who views that event will unknowingly execute the injected code in their browser, potentially leading to session hijacking, data exfiltration, or further exploitation of the victim's browser environment. The remote nature of the attack means that threat actors can exploit this vulnerability from anywhere on the internet without requiring physical access to the target system or network. This makes the vulnerability particularly dangerous in enterprise environments where calendar applications are widely used for scheduling and collaboration, as a single compromised event can potentially affect numerous users within the organization. The vulnerability's persistence lies in the fact that once exploited, the malicious script remains embedded in the application's data store and will continue to execute whenever the affected content is rendered.
The mitigation strategies for CVE-2006-0180 should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application's data handling processes. Organizations should immediately apply the vendor-provided patches or updates that address this specific vulnerability, as the original version 1.2.2 contains known security flaws that have been documented and remediated. Proper implementation of HTML entity encoding for all user-provided content, particularly in fields that may contain special characters or HTML markup, will prevent the execution of injected scripts. Additionally, implementing a Content Security Policy (CSP) header can provide an additional layer of protection by restricting the sources from which scripts can be loaded, thereby mitigating the impact of potential XSS attacks. The vulnerability also highlights the importance of regular security assessments and code reviews to identify and remediate similar issues in other application components, as the presence of one XSS vulnerability often indicates broader input validation weaknesses throughout the application architecture. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for potential exploitation attempts of this class of vulnerability.