CVE-2013-6914 in Garoon
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in a calendar component in Cybozu Garoon before 3.7.2 allows remote authenticated users to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 03/02/2019
The vulnerability identified as CVE-2013-6914 represents a cross-site scripting flaw within the calendar component of Cybozu Garoon software versions prior to 3.7.2. This security weakness specifically affects authenticated users who can leverage the vulnerability to inject malicious web scripts or HTML content into the application's calendar functionality. The issue stems from insufficient input validation and output encoding mechanisms that fail to properly sanitize user-supplied data before rendering it within the web interface.
The technical implementation of this vulnerability resides in the calendar component's handling of user input, where the system does not adequately filter or escape special characters that could be interpreted as HTML or JavaScript code. Attackers with valid credentials can exploit this weakness by crafting malicious payloads that contain script tags or other HTML elements, which then get executed in the context of other users' browsers when they view the affected calendar entries. This type of vulnerability falls under CWE-79 which specifically addresses cross-site scripting flaws in web applications.
The operational impact of this vulnerability extends beyond simple data corruption or display issues, as it creates a potential vector for more sophisticated attacks including session hijacking, credential theft, and the delivery of malware to unsuspecting users. An authenticated attacker can manipulate calendar entries to include malicious code that executes in the browsers of other users who view these entries, potentially leading to complete compromise of user sessions and unauthorized access to sensitive corporate information. The attack requires minimal privileges since only authenticated access is needed, making it particularly dangerous in environments where users have legitimate access to calendar functionality.
From an adversarial perspective, this vulnerability aligns with ATT&CK technique T1531 which involves the use of malicious code injection to gain persistence and execute arbitrary commands. The threat actors can leverage this weakness to establish a foothold within the organization's collaboration platform and potentially escalate privileges through further exploitation. Organizations should note that the vulnerability affects a core collaboration component, making it attractive to attackers targeting enterprise environments where such software is widely deployed. The remediation approach requires immediate patching to version 3.7.2 or later, while implementing additional security controls such as content security policies and regular security assessments of web applications to prevent similar issues in the future.
This vulnerability demonstrates the critical importance of input validation and output encoding in web applications, particularly within collaborative platforms where user-generated content is prevalent. The flaw represents a classic example of how insufficient sanitization of user inputs can lead to severe security consequences, highlighting the necessity for comprehensive security testing and the implementation of defense-in-depth strategies including web application firewalls and regular security audits to identify and remediate similar weaknesses across the organization's digital infrastructure.