| Name | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| tomcat10 (PTS) | bookworm (security), bookworm | 10.1.6-1+deb12u2 | vulnerable |
| sid, trixie | 10.1.34-1 | vulnerable |
| tomcat9 (PTS) | buster (security), buster, buster (lts) | 9.0.31-1~deb10u12 | vulnerable |
| bullseye (security), bullseye | 9.0.43-2~deb11u10 | vulnerable |
| bookworm | 9.0.70-2 | fixed |
| sid, trixie | 9.0.95-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| tomcat10 | source | (unstable) | (unfixed) | | | |
| tomcat9 | source | (unstable) | 9.0.70-2 | | | |
Notes
[bookworm] - tomcat10 <no-dsa> (Minor issue)
Starting with 9.0.70-2 src:tomcat9 no longer ships the server stack, using that as the fixed version
https://lists.apache.org/thread/b2b9qrgjrz1kvo4ym8y2wkfdvwoq6qbp
Issue exists due to an incomplete fix for CVE-2024-50379, but Apache Tomcat
upstream still treats it as disjoint for affected version ranges.