CVE-2024-56337
Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in Apache Tomcat.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (9.03%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Other, older, EOL versions may also be affected. 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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 9.03% probability · 95th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-367
- Affected
- apache/tomcat · netapp/bootstrap os
- Source
- security@apache.org
References
- https://lists.apache.org/thread/b2b9qrgjrz1kvo4ym8y2wkfdvwoq6qbpMailing List, Vendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2024-50379Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/01/msg00009.html
- https://security.netapp.com/advisory/ntap-20250103-0002/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.