CVE-2011-1334 in Dezie
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Cybozu Office 6, Cybozu Garoon 2.0.0 through 2.1.3, Cybozu Dezie before 6.1, Cybozu MailWise before 3.1, and Cybozu Collaborex before 1.5 allows remote attackers to inject arbitrary web script or HTML via vectors related to "downloading graphic files from the mail system."
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Analysis
by VulDB Data Team • 02/09/2019
The vulnerability described in CVE-2011-1334 represents a critical cross-site scripting flaw affecting multiple Cybozu products including Office 6, Garoon 2.0.0 through 2.1.3, Dezie before 6.1, MailWise before 3.1, and Collaborex before 1.5. This security weakness enables remote attackers to execute malicious web scripts or HTML code within the context of affected applications, potentially compromising user sessions and data integrity. The vulnerability specifically manifests when users download graphic files from the mail system, creating an attack vector that exploits insufficient input validation and output encoding mechanisms within the affected software components.
The technical root cause of this vulnerability stems from inadequate sanitization of user-supplied data during the graphic file download process. When users access or download images and other graphical content through the mail system interface, the applications fail to properly validate or escape special characters in file names or metadata. This allows attackers to embed malicious scripts that execute in the victim's browser context, typically through the manipulation of file attributes or headers that are subsequently rendered in web pages. The flaw aligns with CWE-79, which categorizes cross-site scripting vulnerabilities as weaknesses in input validation and output encoding, specifically addressing the failure to sanitize user-provided data before incorporating it into dynamically generated web content.
The operational impact of this vulnerability extends beyond simple script execution, potentially enabling attackers to perform session hijacking, steal sensitive information, redirect users to malicious websites, or manipulate the functionality of the affected applications. Users who download graphic files from compromised mail systems become unwitting participants in attacks that can compromise their entire session, leading to unauthorized access to corporate data or personal information. The widespread nature of the affected products means that organizations using these Cybozu applications face significant exposure risks, particularly in environments where email systems are extensively used for internal communications. Attackers can craft malicious email attachments or links that, when clicked by unsuspecting users, trigger the execution of harmful code within the application context.
Organizations should implement multiple layers of defense to mitigate this vulnerability, beginning with immediate patching of all affected versions to the latest available releases from Cybozu. Network administrators should consider implementing content filtering solutions that can detect and block suspicious file downloads or embedded scripts in email attachments. Web application firewalls can provide additional protection by monitoring for known attack patterns associated with XSS vulnerabilities. Security teams should also conduct thorough user awareness training to prevent social engineering attacks that might exploit this vulnerability, ensuring that employees understand the risks of downloading files from untrusted sources. The remediation process should include comprehensive testing to verify that all affected applications properly sanitize file names and metadata during download operations, with particular attention to the mail system integration points that serve as the primary attack vectors. Organizations should also review their incident response procedures to ensure readiness for potential exploitation of this vulnerability, as the nature of XSS attacks can lead to cascading security incidents across multiple system components.