CVE-2013-6908 in Garoon
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in a mail component in Cybozu Garoon 3.x before 3.7.0 allows remote attackers 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-2013-6908 represents a critical cross-site scripting flaw within the mail component of Cybozu Garoon 3.x software versions prior to 3.7.0. This security weakness resides in the web application's handling of user input within email functionality, creating an avenue for malicious actors to execute arbitrary web scripts or HTML code within the context of other users' browsers. The vulnerability affects organizations utilizing Cybozu Garoon 3.x platforms for their collaboration and communication needs, potentially compromising the integrity of their web-based email systems.
The technical implementation of this XSS vulnerability stems from inadequate input validation and output encoding within the mail component's processing pipeline. Attackers can exploit this weakness by crafting malicious payloads that are then processed and rendered within the email interface without proper sanitization. The unspecified vectors suggest that multiple entry points within the mail component could be leveraged for injection attacks, making the vulnerability particularly concerning as it may be exploitable through various user interaction scenarios such as email composition, viewing, or attachment handling. This flaw operates under CWE-79 which specifically addresses cross-site scripting vulnerabilities where insufficient validation of input data allows malicious scripts to be executed in the victim's browser context.
The operational impact of CVE-2013-6908 extends beyond simple script execution, as it can enable attackers to perform session hijacking, steal sensitive information, redirect users to malicious websites, or even execute arbitrary commands on behalf of authenticated users. Organizations relying on Garoon 3.x systems face significant risks including unauthorized data access, credential theft, and potential system compromise. The vulnerability's remote nature means attackers do not require physical access to the network or system, making it particularly dangerous in enterprise environments where email systems serve as critical communication channels. According to ATT&CK framework, this vulnerability maps to T1059.007 for script injection techniques and T1566 for social engineering tactics that could be amplified through this XSS vector.
Mitigation strategies for this vulnerability require immediate implementation of the vendor-provided patch updating Garoon 3.x to version 3.7.0 or later, which includes proper input validation and output encoding mechanisms. Organizations should also implement comprehensive web application firewalls to detect and block malicious payloads, establish strict input validation policies for all user-supplied data, and conduct regular security assessments of their email infrastructure. Additional protective measures include implementing content security policies, disabling unnecessary email features, and providing security awareness training to users about recognizing potential phishing attempts that might exploit this vulnerability. The remediation process should also involve thorough testing of the updated system to ensure that the patch does not introduce compatibility issues while maintaining the system's core functionality.