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.
Multivendor Vulnerability Alert
Apache Tomcat JK Connector Edge Case Handling Path Traversal Vulnerability
A vulnerability in the Apache Tomcat JK Connector (mod_jk) could allow an unauthenticated, remote attacker to conduct a path traversal attack on a targeted system.
The vulnerability exists because the Apache Web Server (httpd) code that normalizes a request path before matching it to the URI-worker map improperly handles certain edge cases. An attacker could exploit this vulnerability by sending a request that submits malicious input to an affected system. A successful exploit could allow the attacker to read application functionality through a reverse proxy. In addition, an exploit could allow the attacker to bypass access control restrictions that are configured in httpd.
Apache has confirmed the vulnerability and released software updates.
To exploit this vulnerability, the attacker must send a request that submits malicious input to the targeted system, making exploitation more difficult in environments that restrict network access from untrusted sources.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
Administrators are advised to monitor affected systems.
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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.