CVE-2016-1439 in Unified Contact Center Enterprise
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the management interface in Cisco Unified Contact Center Enterprise through 10.5(2) allows remote attackers to inject arbitrary web script or HTML via a crafted URL, aka Bug ID CSCux59650.
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Analysis
by VulDB Data Team • 08/24/2022
The CVE-2016-1439 vulnerability represents a critical cross-site scripting flaw discovered in Cisco Unified Contact Center Enterprise software versions through 10.5(2). This vulnerability exists within the management interface of the system, creating a significant security risk for organizations relying on Cisco's contact center solutions. The flaw enables remote attackers to execute malicious web scripts or HTML code through the manipulation of crafted URLs, effectively bypassing the security controls designed to protect the administrative interface.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding mechanisms within the management interface components of the Cisco Unified Contact Center Enterprise. When users navigate to specifically crafted URLs containing malicious payloads, the system fails to properly sanitize the input parameters before rendering them in the web interface. This lack of proper sanitization creates an environment where attacker-controlled content can be executed in the context of authenticated users' browsers, potentially leading to session hijacking, data exfiltration, or further exploitation of the compromised system.
The operational impact of this vulnerability extends beyond simple script execution, as it fundamentally compromises the integrity of the administrative interface that organizations depend upon for critical contact center operations. Remote attackers can exploit this vulnerability to gain unauthorized access to sensitive customer data, manipulate contact center configurations, or establish persistent access points within the network infrastructure. The vulnerability is particularly dangerous because it affects the management interface, which typically requires elevated privileges and contains sensitive operational controls that could be leveraged for more extensive attacks.
Organizations affected by CVE-2016-1439 should implement immediate mitigations including applying the relevant Cisco security patches and updates, implementing network segmentation to limit access to the management interface, and deploying web application firewalls to detect and block malicious URL patterns. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications, and it maps to ATT&CK technique T1059.007 for script execution through web interfaces. Security teams should also conduct thorough vulnerability assessments to identify any potential exploitation attempts and implement monitoring solutions to detect suspicious URL access patterns that could indicate exploitation attempts against the management interface.
This vulnerability demonstrates the critical importance of proper input validation and output encoding in web applications, particularly those handling administrative functions. The flaw underscores the need for comprehensive security testing during development phases and regular security assessments of deployed systems. Organizations should also consider implementing principle of least privilege access controls for management interfaces and establish robust incident response procedures to address potential exploitation attempts. The vulnerability serves as a reminder that even seemingly minor input validation flaws in administrative interfaces can lead to significant security breaches and compromise of enterprise-level contact center operations.