CVE-2024-56337VulnerabilityPublished 16 Jul 2025Updated 11 Oct 2026

SUSE · security update for tomcat

Affects SUSESource GCVE Database

Mentioned vulnerabilities

Authoritative record:CVE-2024-56337· Critical 9.8

Not known to be exploited · CVSS 9.8 Critical · patch available : patch SUSE as a priority.

Data as of 26 Oct 2026, 08:30 UTC

CVSS 3.1 base score

9.8Critical

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 8.9% chance of exploitation in 30 days – higher than 95% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available

Exploitation evidence

Disclosed: evidence found.
CVE published 20 Dec 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Ubuntu:Pro:16.04:LTStomcat8`pkg:deb/ubuntu/tomcat8@8.0.32-1ubuntu1.13+esm2?arch=source&distro=esm-infra-legacy/xenial`Other threats	Affected =8.0.26-1 =8.0.28-1 =8.0.30-1 =8.0.32-1 =8.0.32-1ubuntu1 =8.0.32-1ubuntu1.1 =8.0.32-1ubuntu1.2 =8.0.32-1ubuntu1.3 =8.0.32-1ubuntu1.4 =8.0.32-1ubuntu1.5 =8.0.32-1ubuntu1.6 =8.0.32-1ubuntu1.7 =8.0.32-1ubuntu1.8 =8.0.32-1ubuntu1.9 =8.0.32-1ubuntu1.10 =8.0.32-1ubuntu1.11 =8.0.32-1ubuntu1.13 =8.0.32-1ubuntu1.13+esm1 =8.0.32-1ubuntu1.13+esm2	Fixed in–
Ubuntu:Pro:18.04:LTStomcat8`pkg:deb/ubuntu/tomcat8@8.5.39-1ubuntu1~18.04.3+esm6?arch=source&distro=esm-apps/bionic`Other threats	Affected =8.5.21-1ubuntu1 =8.5.29-1 =8.5.30-1 =8.5.30-1ubuntu1 =8.5.30-1ubuntu1.2 =8.5.30-1ubuntu1.3 =8.5.30-1ubuntu1.4 =8.5.39-1ubuntu1~18.04.1 =8.5.39-1ubuntu1~18.04.2 =8.5.39-1ubuntu1~18.04.3 =8.5.39-1ubuntu1~18.04.3+esm1 =8.5.39-1ubuntu1~18.04.3+esm2 =8.5.39-1ubuntu1~18.04.3+esm3 =8.5.39-1ubuntu1~18.04.3+esm4 =8.5.39-1ubuntu1~18.04.3+esm5 =8.5.39-1ubuntu1~18.04.3+esm6	Fixed in–
Ubuntu:Pro:18.04:LTStomcat9`pkg:deb/ubuntu/tomcat9@9.0.16-3ubuntu0.18.04.2+esm8?arch=source&distro=esm-apps/bionic`Other threats	Affected =9.0.16-3~18.04.1 =9.0.16-3ubuntu0.18.04.1 =9.0.16-3ubuntu0.18.04.2 =9.0.16-3ubuntu0.18.04.2+esm1 =9.0.16-3ubuntu0.18.04.2+esm2 =9.0.16-3ubuntu0.18.04.2+esm3 =9.0.16-3ubuntu0.18.04.2+esm4 =9.0.16-3ubuntu0.18.04.2+esm5 =9.0.16-3ubuntu0.18.04.2+esm6 =9.0.16-3ubuntu0.18.04.2+esm7 =9.0.16-3ubuntu0.18.04.2+esm8	Fixed in–
Ubuntu:Pro:20.04:LTStomcat9`pkg:deb/ubuntu/tomcat9@9.0.31-1ubuntu0.9+esm3?arch=source&distro=esm-apps/focal`Other threats	Affected =9.0.24-1 =9.0.27-1 =9.0.31-1 =9.0.31-1ubuntu0.1 =9.0.31-1ubuntu0.2 =9.0.31-1ubuntu0.3 =9.0.31-1ubuntu0.4 =9.0.31-1ubuntu0.5 =9.0.31-1ubuntu0.6 =9.0.31-1ubuntu0.7 =9.0.31-1ubuntu0.8 =9.0.31-1ubuntu0.9 =9.0.31-1ubuntu0.9+esm1 =9.0.31-1ubuntu0.9+esm2 =9.0.31-1ubuntu0.9+esm3	Fixed in–
Ubuntu:Pro:22.04:LTStomcat9`pkg:deb/ubuntu/tomcat9@9.0.58-1ubuntu0.2+esm4?arch=source&distro=esm-apps/jammy`Other threats	Affected =9.0.43-3 =9.0.54-1 =9.0.55-1 =9.0.58-1 =9.0.58-1ubuntu0.1 =9.0.58-1ubuntu0.1+esm1 =9.0.58-1ubuntu0.1+esm2 =9.0.58-1ubuntu0.1+esm3 =9.0.58-1ubuntu0.1+esm4 =9.0.58-1ubuntu0.2 =9.0.58-1ubuntu0.2+esm1 =9.0.58-1ubuntu0.2+esm2 =9.0.58-1ubuntu0.2+esm3 =9.0.58-1ubuntu0.2+esm4	Fixed in–
Ubuntu:24.04:LTStomcat10`pkg:deb/ubuntu/tomcat10@10.1.16-1?arch=source&distro=noble`Other threats	Affected =10.1.10-1 =10.1.14-1 =10.1.15-1 =10.1.16-1	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Fixes are available starting with Tomcat versions 11.0.3, 10.1.35, and 9.0.99 which include checks to ensure the system property sun.io.useCanonCaches is set appropriately and default it to false when possible. Users running affected versions should upgrade to these or later versions. For those unable to upgrade immediately, configure the Java system property sun.io.useCanonCaches to false explicitly if running on Java 8 or 11, and ensure it is false if set on Java 17. No additional configuration is required for Java 21 or later. This mitigates the incomplete fix from CVE-2024-50379. Users should verify their default servlet write setting and file system case sensitivity to assess exposure.

Description

Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies. Security Fix(es): * tomcat: Incomplete fix for CVE-2024-50379 - RCE due to TOCTOU issue in JSP compilation (CVE-2024-56337) * tomcat: Apache Tomcat: DoS via malformed HTTP/2 PRIORITY_UPDATE frame (CVE-2025-31650) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Impact

The vulnerability allows an attacker to exploit a race condition in file handling on case insensitive file systems, potentially leading to full compromise of confidentiality, integrity, and availability of the affected Tomcat server. The CVSS 3.1 vector indicates network exploitable with low complexity, no privileges or user interaction required, and critical impact on all security properties. This could enable remote attackers to execute unauthorized actions or disrupt service.

Summary

This vulnerability is a TOCTOU race condition in Apache Tomcat affecting versions from 11.0.0-M1 through 11.0.1, 10.1.0-M1 through 10.1.33, 9.0.0.M1 through 9.0.97, and 8.5.0 through 8.5.100 (EOL). It arises when Tomcat is run on case insensitive file systems with the default servlet write enabled (readonly initialization parameter set to false). The mitigation for CVE-2024-50379 was incomplete, requiring additional configuration of the Java system property sun.io.useCanonCaches depending on the Java version: set to false explicitly on Java 8 and 11, set to false if set on Java 17, and no action needed on Java 21 and later. Tomcat 11.0.3, 10.1.35, and 9.0.99 and later versions include built-in checks and default the system property to false where applicable to prevent exploitation.

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition (opens in a new tab)
Base weaknessLikelihood of exploit: Medium
The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.
Implementation
The most basic advice for TOCTOU vulnerabilities is to not perform a check before the use. This does not resolve the underlying issue of the execution of a function on a resource whose state and identity cannot be assured, but it does help to limit the false sense of security given by the check.
Implementation
When the file being altered is owned by the current user and group, set the effective gid and uid to that of the current user and group when executing this statement.
Architecture and Design
Limit the interleaving of operations on files from multiple processes.
OWASP Cheat Sheets
Abuse Case (opens in a new tab)
OWASP ASVS 4.0.3
V1.11.3 (opens in a new tab)
V11.1.6 (opens in a new tab)
V1.11.2 (opens in a new tab)
Attack patterns
Leveraging Race Conditions via Symbolic Links (opens in a new tab)
Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-20Improper Input Validation (opens in a new tab)
Class weaknessLikelihood of exploit: HighCWE Top 25 (2025): #18OWASP Top 10 A05:2025: Injection (opens in a new tab)
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
MITRE discourages mapping vulnerabilities to this broad entry; the root cause is usually a more specific weakness.
Architecture and Design · Attack Surface Reduction
Consider using language-theoretic security (LangSec) techniques that characterize inputs using a formal language and build "recognizers" for that language. This effectively requires parsing to be a distinct layer that effectively enforces a boundary between raw input and internal data representations, instead of…
Architecture and Design · Libraries or Frameworks
Use an input validation framework such as Struts or the OWASP ESAPI Validation API. Note that using a framework does not automatically address all input validation problems; be mindful of weaknesses that could arise from misusing the framework itself (CWE-1173).
Architecture and Design · Implementation · Attack Surface Reduction
Understand all the potential areas where untrusted inputs can enter the product, including but not limited to: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any…
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
Injection Prevention (opens in a new tab)
SQL Injection Prevention (opens in a new tab)
Injection Prevention in Java (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
Attack patterns
Buffer Overflow via Environment Variables (opens in a new tab)
Server Side Include (SSI) Injection (opens in a new tab)
Cross Zone Scripting (opens in a new tab)
Command Line Execution through SQL Injection (opens in a new tab)
Object Relational Mapping Injection (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 30 Jul 2026, 11:28 UTC

WeaknessesCWE-367, CWE-20

Technical details

References

Community reviews

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