Effective 2019 Sep 15, Cisco will no longer publish non-Cisco product alerts. Cisco will continue to publish Security Advisories to address third-party software vulnerabilities per the Cisco Security Vulnerability Policy.
A vulnerability in Apache Tomcat could allow an unauthenticated, remote attacker to bypass security restrictions and access sensitive information on a targeted system.
The vulnerability is due to the improper handling of security constraints on a URL containing a character sequence of double quotes surrounded by empty space ( "" ) that maps to the context root of a web application. The context root is used to determine which URL the affected software delegates to a web application. An attacker could exploit this vulnerability to bypass security constraint definitions, which could be used to gain unauthorized access to web application resources on a targeted system.
The Apache Software Foundation has confirmed the vulnerability and released software updates.
To exploit this vulnerability, an attacker may need to have access to trusted, internal networks on which a targeted system may reside.
Administrators are advised to apply the appropriate software updates.
Administrators are advised to allow only trusted users to have network access.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to monitor affected systems.
The Apache Software Foundation has released a bug report and security advisories at the following links:
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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.