CVE-2014-3294 in WebEx Meetings Server
Summary
by MITRE
Cisco WebEx Meeting Server does not properly restrict the content of URLs, which allows remote authenticated users to obtain sensitive information by reading (1) web-server access logs, (2) web-server Referer logs, or (3) the browser history, aka Bug ID CSCuj81691.
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Analysis
by VulDB Data Team • 06/22/2021
The vulnerability identified as CVE-2014-3294 affects Cisco WebEx Meeting Server, a widely used platform for hosting virtual meetings and collaborative sessions. This security flaw stems from inadequate input validation mechanisms within the web server component that processes user-supplied URL parameters. The vulnerability specifically manifests when the application fails to properly sanitize or restrict the content of URLs submitted by authenticated users, creating a path for information disclosure attacks that can compromise sensitive data stored in server logs and browser history. The issue represents a significant security weakness in the server's access control and data handling procedures, particularly affecting the confidentiality of information that should remain protected from unauthorized access.
The technical implementation of this vulnerability involves the WebEx Meeting Server's insufficient validation of URL content, which allows authenticated attackers to inject malicious parameters into the URL structure. When these parameters are processed by the server, they can contain sensitive information that gets logged in various server components including web-server access logs, Referer logs, and browser history records. The flaw operates through the server's logging mechanisms where user-supplied data is not adequately filtered or escaped before being written to log files or stored in browser history. This creates a scenario where an attacker can craft specific URL parameters that, when accessed by other users or when processed by the server, reveal sensitive information that would otherwise remain confidential. The vulnerability falls under the category of information disclosure through improper input handling, which is classified as CWE-20 in the Common Weakness Enumeration framework.
The operational impact of CVE-2014-3294 extends beyond simple data exposure, as it can lead to comprehensive information gathering attacks that compromise multiple aspects of system security. Attackers can exploit this vulnerability to extract session tokens, user credentials, system configurations, or other sensitive metadata that may be stored in server logs or browser history. This information can then be leveraged for further attacks including session hijacking, privilege escalation, or lateral movement within the network. The vulnerability affects the integrity of the logging infrastructure, as the logs that should provide security monitoring capabilities become sources of sensitive information leakage. Additionally, the impact extends to user privacy and data protection compliance, as the exposure of such information may violate regulatory requirements for data protection and confidentiality. The vulnerability also demonstrates poor separation of concerns in the application's architecture, where user input is not properly isolated from system logging mechanisms.
Mitigation strategies for this vulnerability should focus on implementing robust input validation and sanitization procedures within the WebEx Meeting Server environment. Organizations should ensure that all URL parameters are properly validated and filtered before being processed or logged by the server components. The implementation of proper escape sequences and encoding mechanisms for user-supplied data can prevent malicious content from being stored in log files or browser history. Security patches provided by Cisco should be applied immediately to address the root cause of the vulnerability, as the company released specific fixes for this issue in their security advisories. Network segmentation and monitoring controls should be implemented to detect unusual access patterns that may indicate exploitation attempts. Organizations should also consider implementing web application firewalls to provide additional layers of protection against malicious URL parameter injection attacks. The vulnerability highlights the importance of following secure coding practices and adhering to the principle of least privilege in web application development, ensuring that user input is never directly trusted or logged without proper sanitization. This vulnerability also aligns with ATT&CK technique T1071.004 which covers application layer protocol: web protocols, and demonstrates the need for comprehensive security testing including input validation and logging security reviews.