CVE-2014-2194 in Unified Web
Summary
by MITRE
system/egain/chat/entrypoint in Cisco Unified Web and E-mail Interaction Manager 9.0(2) allows remote attackers to have an unspecified impact by injecting a spoofed XML external entity.
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Analysis
by VulDB Data Team • 05/17/2018
The vulnerability identified as CVE-2014-2194 resides within the Cisco Unified Web and E-mail Interaction Manager version 9.0(2) system components, specifically in the chat entrypoint functionality located at system/egain/chat/entrypoint. This flaw represents a critical security weakness that enables remote attackers to exploit XML external entity injection vulnerabilities. The affected component processes XML input without proper validation, creating an avenue for malicious actors to manipulate the system through crafted XML payloads that contain external entity declarations. This vulnerability falls under the broader category of XML External Entity processing flaws, which are commonly classified under CWE-611 in the Common Weakness Enumeration catalog. The attack vector leverages the system's failure to sanitize XML input, allowing remote threat actors to inject malicious XML entities that can be processed by the underlying XML parser. When such malformed XML is submitted through the chat entrypoint, it can trigger unintended system behavior that may lead to information disclosure, denial of service, or potentially remote code execution depending on the system configuration and underlying parser implementation. The unspecified impact mentioned in the CVE description indicates that the vulnerability could enable various malicious outcomes including but not limited to data exfiltration, system compromise, or disruption of services.
The technical exploitation of this vulnerability occurs when an attacker submits specially crafted XML data through the vulnerable chat entrypoint interface. The system's XML parser processes the malicious input without proper validation, allowing the external entity references to be resolved and executed. This type of attack is particularly dangerous because it can be executed remotely without requiring authentication, making it an attractive target for automated exploitation tools. The vulnerability represents a classic case of insecure XML processing where the system fails to implement proper input sanitization and entity validation mechanisms. Attackers can leverage this flaw to perform server-side request forgery attacks, access internal system resources, or potentially escalate privileges within the affected system. The attack surface is expanded by the fact that this vulnerability affects the web and email interaction manager components, which are typically accessible through standard network protocols and may be exposed to untrusted network traffic. According to ATT&CK framework, this vulnerability maps to techniques involving XML external entity injection and command execution through web services, with potential lateral movement opportunities if the system has access to sensitive internal resources.
The operational impact of CVE-2014-2194 extends beyond simple information disclosure, potentially enabling attackers to gain unauthorized access to sensitive data and system resources. Organizations utilizing Cisco Unified Web and E-mail Interaction Manager 9.0(2) are at risk of having their communication systems compromised, which could lead to data breaches, service disruption, and unauthorized access to customer information. The vulnerability's remote exploitability means that attackers can target the system from anywhere on the internet without requiring physical access or local network presence. This makes the attack surface particularly broad and difficult to monitor or control. The unspecified nature of the impact suggests that depending on the specific implementation and configuration, attackers might be able to achieve varying degrees of system compromise, from simple denial of service to complete system takeover. Organizations should consider the potential for this vulnerability to be used as a stepping stone for more extensive attacks within their network infrastructure, particularly if the affected system has access to sensitive databases or other critical resources. The vulnerability also poses risks to business continuity and regulatory compliance, as unauthorized access to communication systems could result in significant operational disruption and potential legal consequences. Security teams must prioritize this vulnerability due to its remote exploitability and the potential for escalation to more severe compromise scenarios.
Mitigation strategies for CVE-2014-2194 should focus on immediate remediation through official Cisco patches and updates. Organizations should implement network segmentation to limit access to the vulnerable system, particularly restricting direct internet exposure of the chat entrypoint component. Input validation controls should be enhanced to prevent XML external entity processing, including disabling external entity resolution in XML parsers and implementing proper XML schema validation. Network monitoring should be enhanced to detect suspicious XML traffic patterns and potential exploitation attempts. Security teams should consider implementing web application firewalls to filter malicious XML content before it reaches the vulnerable system components. The Cisco advisory for this vulnerability recommends upgrading to a patched version of the Unified Web and E-mail Interaction Manager software, as the vendor has released security updates specifically addressing this flaw. Organizations should also conduct thorough vulnerability assessments to identify any additional systems that might be exposed to similar XML external entity injection risks. Access controls should be reviewed and strengthened to ensure that only authorized users can submit data to the chat entrypoint functionality. Regular security audits and penetration testing should be performed to validate the effectiveness of implemented controls. The remediation process should include comprehensive testing to ensure that updates do not negatively impact legitimate system functionality while effectively addressing the security vulnerability. Additionally, organizations should implement proper logging and monitoring of XML processing activities to detect and respond to potential exploitation attempts.