critical
9.8
CWE
367 362 119 416
Advisory Published
Advisory Published
Updated

CVE-2024-56337: Apache Tomcat: RCE due to TOCTOU issue in JSP compilation - CVE-2024-50379 mitigation was incomplete

First published: Fri Dec 20 2024(Updated: )

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 property sun.io.useCanonCaches must be explicitly set to false (it defaults to true) - running on Java 17: the system 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 that sun.io.useCanonCaches is set appropriately before allowing the default servlet to be write enabled on a case insensitive file system. Tomcat will also set sun.io.useCanonCaches to false by default where it can.

Credit: security@apache.org security@apache.org

Affected SoftwareAffected VersionHow to fix
maven/org.apache.tomcat.embed:tomcat-embed-core>=9.0.0.M1<9.0.98
9.0.98
maven/org.apache.tomcat.embed:tomcat-embed-core>=10.1.0-M1<10.1.34
10.1.34
maven/org.apache.tomcat.embed:tomcat-embed-core>=11.0.0-M1<11.0.2
11.0.2
maven/org.apache.tomcat:tomcat-embed-core>=9.0.0.M1<9.0.98
9.0.98
maven/org.apache.tomcat:tomcat-catalina>=10.1.0-M1<10.1.34
10.1.34
maven/org.apache.tomcat:tomcat-catalina>=11.0.0-M1<11.0.2
11.0.2

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Frequently Asked Questions

  • What is the severity of CVE-2024-56337?

    CVE-2024-56337 is categorized as a time-of-check time-of-use (TOCTOU) race condition vulnerability with potential security implications.

  • How do I fix CVE-2024-56337?

    To resolve CVE-2024-56337, upgrade Apache Tomcat to versions 9.0.98, 10.1.34, or 11.0.2 depending on your current setup.

  • What versions of Apache Tomcat are affected by CVE-2024-56337?

    CVE-2024-56337 affects Apache Tomcat versions from 11.0.0-M1 through 11.0.1, 10.1.0-M1 through 10.1.33, and 9.0.0.M1 through 9.0.97.

  • Is CVE-2024-56337 a critical vulnerability?

    CVE-2024-56337 has serious implications but should be assessed within the context of your specific environment for criticality.

  • Can CVE-2024-56337 lead to remote code execution?

    While CVE-2024-56337 is a race condition that can create security risks, it does not directly facilitate remote code execution on its own.

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