CVE-2016-1149 in Office
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Cybozu Office 9.0.0 through 10.3.0 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors, a different vulnerability than CVE-2015-7795, CVE-2015-7796, CVE-2015-7797, CVE-2015-7798, and CVE-2016-1150.
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Analysis
by VulDB Data Team • 07/30/2018
The vulnerability identified as CVE-2016-1149 represents a cross-site scripting flaw within Cybozu Office versions 9.0.0 through 10.3.0, classified under the Common Weakness Enumeration category CWE-79 which specifically addresses insecure direct object references and improper input handling. This vulnerability enables remote attackers to execute arbitrary web scripts or HTML code within the context of affected user sessions, creating a significant security risk for organizations relying on this collaboration platform. Unlike other related vulnerabilities such as CVE-2015-7795 through CVE-2016-1150 which addressed different attack vectors, CVE-2016-1149 operates through distinct mechanisms that remain unpatched in the affected software versions.
The technical exploitation of this XSS vulnerability occurs through unspecified attack vectors that likely involve improper sanitization of user input within the Cybozu Office application framework. Attackers can leverage this weakness by crafting malicious payloads that get executed when legitimate users view affected pages or interact with the application. The vulnerability's impact extends beyond simple script execution as it can facilitate session hijacking, credential theft, and unauthorized access to sensitive corporate data. The attack surface is particularly concerning given that Cybozu Office is designed for business collaboration and document management, making it a prime target for attackers seeking persistent access to enterprise networks.
The operational implications of CVE-2016-1149 are severe for organizations utilizing affected Cybozu Office versions, as successful exploitation can lead to complete compromise of user sessions and potential lateral movement within the network. The vulnerability falls under the MITRE ATT&CK framework's technique T1059.007 for command and scripting interpreter, where attackers can execute malicious code through web-based interfaces. Organizations may experience data breaches, unauthorized modifications to collaborative documents, and potential exfiltration of sensitive business information. The persistence of this vulnerability across multiple minor versions indicates a fundamental flaw in the input validation and output encoding mechanisms within the application's security architecture.
Mitigation strategies for CVE-2016-1149 should prioritize immediate patching of affected Cybozu Office installations to the latest available versions that address this specific XSS vulnerability. Organizations should implement comprehensive input validation and output encoding measures at multiple layers of their application architecture, including web application firewalls and security headers. Network segmentation and monitoring solutions should be deployed to detect anomalous script execution patterns that may indicate exploitation attempts. Security teams should conduct thorough vulnerability assessments of all web applications within their environment, particularly those handling user-generated content, and implement proper security awareness training for end users to recognize potential social engineering attacks that may leverage this vulnerability. The implementation of Content Security Policy headers and proper HTML escaping mechanisms would significantly reduce the attack surface for similar vulnerabilities in the future.