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XCCDF
Apache Tomcat Application Server 9 Security Technical Implementation Guide
SRG-APP-000516-AS-000237
ALLOW_BACKSLASH must be set to false.
ALLOW_BACKSLASH must be set to false.
An XCCDF Rule
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ALLOW_BACKSLASH must be set to false.
Medium Severity
<VulnDiscussion>When Tomcat is installed behind a proxy configured to only allow access to certain Tomcat contexts (web applications), an HTTP request containing "/\../" may allow attackers to work around the proxy restrictions using directory traversal attack methods. If allow_backslash is true the '\' character will be permitted as a path delimiter. The default value for the setting is false but Tomcat should always be configured as if no proxy restricting context access was used and allow_backslash should be set to false to prevent directory traversal style attacks. This setting can create operability issues with non-compliant clients. In order to accommodate a non-compliant client, any deviation from the STIG setting must be approved by the ISSO.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>