CVE-2017-12288 in Unified Contact Center Express
Summary
by MITRE
A vulnerability in the web-based management interface of Cisco Unified Contact Center Express could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of an affected device. The vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of the affected device. An attacker could exploit this vulnerability by persuading a user of the interface to click a malicious link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the interface or allow the attacker to access sensitive browser-based information. Cisco Bug IDs: CSCvf09173.
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Analysis
by VulDB Data Team • 01/19/2021
The vulnerability described in CVE-2017-12288 represents a critical cross-site scripting flaw within Cisco Unified Contact Center Express web-based management interface. This system serves as a comprehensive contact center solution that handles customer interactions through various communication channels including voice, email, and chat. The web interface provides administrators and users with access to configuration settings, performance monitoring, and user management capabilities, making it a prime target for malicious actors seeking unauthorized access to sensitive business data and operational controls. The vulnerability specifically affects the authentication mechanisms and input validation processes within the management interface, creating an attack vector that could compromise the entire contact center infrastructure.
The technical root cause of this vulnerability stems from inadequate input validation within the web application layer of Cisco Unified Contact Center Express. According to CWE-79 Cross-site Scripting, the flaw manifests when user-supplied data enters the application without proper sanitization or encoding before being rendered in web pages. The insufficient validation allows malicious payloads to be injected through carefully crafted URLs or interface parameters that are then executed by the victim's browser. The vulnerability is classified as a stored XSS variant since the malicious scripts can be persisted within the application's database and executed whenever affected pages are accessed. Attackers exploiting this vulnerability can leverage the web interface's administrative privileges to manipulate session tokens, inject malicious code, or redirect users to phishing sites that could harvest sensitive credentials and business information.
The operational impact of this vulnerability extends beyond simple script execution, creating a comprehensive threat landscape that could severely compromise contact center operations and customer data security. An unauthenticated attacker could exploit this weakness to steal session cookies, perform actions on behalf of legitimate users, or gain access to sensitive information such as customer contact details, call recordings, and agent login credentials. The attack requires minimal privileges and can be executed through social engineering techniques such as sending malicious links via email or instant messaging to unsuspecting administrators or agents. This vulnerability directly impacts the CIA triad by potentially compromising confidentiality through data exfiltration, integrity through unauthorized modifications, and availability through potential service disruption. Organizations using this platform could face regulatory compliance violations, financial losses, and reputational damage if attackers successfully exploit this flaw to access sensitive customer information or disrupt contact center operations.
Mitigation strategies for CVE-2017-12288 should focus on both immediate remediation and long-term security enhancements to protect against similar vulnerabilities. Cisco has released patches and software updates addressing this specific flaw, which should be implemented immediately across all affected systems following the vendor's recommended deployment procedures. Network segmentation and access controls should be implemented to limit direct internet exposure of the management interface, while implementing web application firewalls to detect and block malicious script injection attempts. Regular security assessments and input validation reviews should be conducted to identify similar vulnerabilities in other applications and ensure proper encoding of user-supplied data. Organizations should also implement user education programs to recognize social engineering attempts and establish monitoring procedures to detect unusual activity patterns that may indicate exploitation attempts. The ATT&CK framework categorizes this vulnerability under T1059 Command and Scripting Interpreter and T1566 Phishing techniques, highlighting the need for comprehensive defensive measures that address both technical controls and human factors in cybersecurity defense.