HTTP: Apache Tomcat Default Servlet getCanonicalPath Remote Code Execution

This signature detects attempts to exploit a known vulnerability against Apache Tomcat. A successful attack can lead to arbitrary code execution.

Extended Description

Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.1, from 10.1.0-M1 through 10.1.33, from 9.0.0.M1 through 9.0.97. The mitigation for CVE-2024-50379 was incomplete. Users running Tomcat on a case insensitive file system with the default servlet write enabled (readonly initialisation parameter set to the non-default value of false) may need additional configuration to fully mitigate CVE-2024-50379 depending on which version of Java they are using with Tomcat: - running on Java 8 or Java 11: the system propertysun.io.useCanonCaches must be explicitly set to false (it defaults to true) - running on Java 17: thesystem property sun.io.useCanonCaches, if set, must be set to false(it defaults to false) - running on Java 21 onwards: no further configuration is required(the system property and the problematic cache have been removed) Tomcat 11.0.3, 10.1.35 and 9.0.99 onwards will include checks thatsun.io.useCanonCaches is set appropriately before allowing the default servlet to be write enabled on a case insensitive file system. Tomcat will also setsun.io.useCanonCaches to false by default where it can.

References

CVE: CVE-2024-56337

URL: https://lists.apache.org/thread/2bjnh3p78b89n5hw539hh31sr7tt7m22

Short Name

HTTP:APACHE:GET-CNONICL-PATH-CE

Severity

Major

Recommended

True

Recommended Action

Drop

HTTP: Apache Tomcat Default Servlet getCanonicalPath Remote Code Execution

Extended Description

References

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