A vulnerability in the Cross-Origin Resource Sharing (CORS) filter feature of Apache Tomcat could allow an unauthenticated, remote attacker to bypass security restrictions on a targeted system.
The vulnerability exists because the default CORS filter settings used by the affected software are insecure and the supportsCredentials feature is enabled for all origins. An attacker could exploit this vulnerability to bypass the CORS filter feature on a targeted system. A successful exploit could allow the attacker to access restricted resources or execute arbitrary code on the system.
The Apache Software Foundation has confirmed the vulnerability and released software updates.
This vulnerability exists because the default settings for the CORS filter used by affected versions of Apache Tomcat are insecure. Administrators are encouraged not to use the CORS filter default settings in their environments.
Administrators are advised to apply the appropriate software updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor affected systems.
The Apache Software Foundation has released a security advisory at the following link: CVE-2018-8014.
The Apache Software Foundation has released software updates at the following link: Apache Updates.
Cisco has updated the CVSS temporal score related to the Apache Tomcat CORS filter security features vulnerability.
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.