CVE-2022-20802 in Enterprise Chat and Email
Summary
by MITRE • 05/27/2022
A vulnerability in the web interface of Cisco Enterprise Chat and Email (ECE) could allow an authenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. This vulnerability is due to insufficient validation of user-supplied input that is processed by the web interface. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected system. A successful exploit could allow the attacker to execute arbitrary code in the context of the interface or access sensitive, browser-based information. To successfully exploit this vulnerability, an attacker would need valid agent credentials.
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Analysis
by VulDB Data Team • 06/01/2022
The vulnerability identified as CVE-2022-20802 represents a critical cross-site scripting weakness within Cisco Enterprise Chat and Email (ECE) web interface components. This flaw exists in the application's input validation mechanisms, specifically failing to properly sanitize user-supplied data that flows through the web interface processing pipeline. The vulnerability is classified under CWE-79 which denotes cross-site scripting flaws, making it a well-documented and dangerous class of web application security weakness. The attack vector requires an authenticated attacker with valid agent credentials, establishing a privileged execution context that significantly reduces the attack surface complexity while maintaining substantial impact potential.
The technical exploitation of this vulnerability occurs through crafted HTTP requests that leverage the insufficient input validation to inject malicious scripts into the web interface. This allows attackers to execute arbitrary code within the context of the affected web application, effectively compromising the user session and potentially gaining access to sensitive browser-based information. The vulnerability's impact extends beyond simple script execution as it can enable session hijacking, data exfiltration, and privilege escalation within the application's user context. According to ATT&CK framework, this vulnerability maps to T1059.007 for scripting and T1566 for credential access through web application attacks, demonstrating how this weakness can serve as a stepping stone for broader compromise.
The operational impact of CVE-2022-20802 is significant for organizations relying on Cisco ECE for enterprise communication services. Successful exploitation can lead to unauthorized access to sensitive corporate communications, user credentials, and potentially escalate to full system compromise if the web interface has elevated privileges. The requirement for valid agent credentials means that attackers must first obtain legitimate access through other means such as credential theft, social engineering, or prior exploitation of other vulnerabilities. Organizations using this platform face increased risk of data breaches and insider threat exploitation, particularly in environments where multiple users interact with the web interface regularly. The vulnerability affects the application's integrity and confidentiality, potentially enabling attackers to monitor communications, modify messages, or gain unauthorized access to user accounts.
Mitigation strategies for CVE-2022-20802 should focus on both immediate patching and defensive measures. Cisco has released security updates addressing this vulnerability, which should be prioritized for deployment across affected systems. Organizations should implement robust input validation and output encoding mechanisms to prevent similar issues in other applications. Network segmentation and access controls can help limit the impact of successful exploitation by restricting access to the web interface. Regular security assessments and penetration testing should be conducted to identify and remediate similar input validation weaknesses. Additionally, implementing web application firewalls and security monitoring solutions can help detect and prevent exploitation attempts. The vulnerability highlights the importance of maintaining up-to-date security patches and implementing defense-in-depth strategies to protect enterprise communication platforms from authenticated attack vectors.