CVE-2024-56337

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 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.

Reserved 2024-12-20 | Published 2024-12-20 | Updated 2025-01-03 | Assigner apache

Problem types

CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

Product status

Default status
unaffected

11.0.0-M1
affected

10.1.0-M1
affected

9.0.0.M1
affected

Credits

This vulnerability was first reported by Nacl, WHOAMI, Yemoli and Ruozhi. finder

This vulnerability was independently reported with a very helpful PoC by dawu@knownsec 404 team and Sunflower@knownsec 404 team finder

References

www.cve.org/CVERecord?id=CVE-2024-50379 vdb-entry

lists.apache.org/thread/b2b9qrgjrz1kvo4ym8y2wkfdvwoq6qbp vendor-advisory

cve.org (CVE-2024-56337)

nvd.nist.gov (CVE-2024-56337)

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