CVE-2017-2114 in Office
Summary
by MITRE
Cross-site scripting vulnerability in Cybozu Office 10.0.0 to 10.5.0 allows remote authenticated attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 12/22/2020
The vulnerability identified as CVE-2017-2114 represents a critical cross-site scripting flaw within Cybozu Office versions 10.0.0 through 10.5.0. This security weakness enables remote authenticated attackers to execute malicious web scripts or HTML code within the context of affected systems. The vulnerability stems from insufficient input validation and output encoding mechanisms within the application's web interface, creating an exploitable condition that can be leveraged by malicious actors who have already gained legitimate authentication credentials. The affected software platform serves as a collaborative office solution that includes various web-based applications and services, making it a prime target for attackers seeking to compromise user sessions and execute unauthorized operations.
The technical implementation of this vulnerability involves the improper handling of user-supplied input data within the Cybozu Office application framework. Attackers can exploit this weakness by crafting malicious payloads that are subsequently processed and rendered within the web interface without adequate sanitization or encoding measures. The unspecified vectors suggest that multiple entry points within the application may be susceptible to this type of injection attack, potentially encompassing form fields, URL parameters, or other interactive components that accept user input. This lack of specific vector identification indicates a systemic flaw in the application's input validation architecture rather than a single isolated weakness.
From an operational standpoint, this vulnerability poses significant risks to organizations utilizing Cybozu Office within their collaborative environments. The remote authenticated nature of the attack means that an attacker with valid user credentials can exploit this weakness from any location, potentially compromising user sessions and gaining access to sensitive corporate data. The ability to inject arbitrary web scripts or HTML code allows attackers to perform various malicious activities including session hijacking, data exfiltration, and redirection to malicious websites. The impact extends beyond individual user compromise to potentially affect entire organizational networks, particularly when users with elevated privileges are targeted. This vulnerability directly violates the principle of least privilege and can undermine the security posture of organizations relying on the affected software platform.
Organizations should implement immediate mitigations to address this vulnerability including applying the latest security patches released by Cybozu, implementing robust input validation mechanisms, and deploying web application firewalls to detect and block malicious script injection attempts. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications, and can be categorized under ATT&CK technique T1059.007 for scripting languages and T1566 for malicious file execution. Additional defensive measures should include user education regarding suspicious web content, implementation of content security policies, and regular security assessments of web applications. Organizations should also consider implementing network segmentation and monitoring solutions to detect anomalous behavior patterns that may indicate exploitation attempts. The remediation process should include thorough testing of patches to ensure compatibility with existing workflows and business processes while maintaining the integrity of the collaborative office environment.