Denial of Service attack on windows app using netty

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

5.4 · CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P · score source

EPSS

• CVE-2024-47535: 0.41% estimated exploitation activity in the next 30 days; percentile 35.15 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary An unsafe reading of environment file could potentially cause a denial of service in Netty. When loaded on an Windows application, Netty attemps to load a file that does not exist. If an attacker creates such a large file, the Netty application crash. Details When the library netty is loaded in a java windows application, the library tries to identify the system environnement in which it is executed. At this stage, Netty tries to load both /etc/os-release and /usr/lib/os-release even though it is in a Windows environment. <img width="364" alt="1" src="https://github.com/user-attachments/assets/9466b181-9394-45a3-b0e3-1dcf105def59" If netty finds this files, it reads them and loads them into memory. By default : - The JVM maximum memory size is set to 1 GB, - A non-privileged user can create a directory at C:\ and create files within it. <img width="340" alt="2" src="https://github.com/user-attachments/assets/43b359a2-5871-4592-ae2b-ffc40ac76831" <img width="523" alt="3"…

Published by the source

12 Nov 2024, 19:53 UTC

Last modified by the source

18 Feb 2025, 15:57 UTC

Source last checked

26 Oct 2026, 16:35 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-xq3w-v528-46rv

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# Patch Next advisory brief: CVE-2024-47535

Advisory: Denial of Service attack on windows app using netty
IDs: CVE-2024-47535, GHSA-xq3w-v528-46rv
Record: https://patchnext.com/advisories/cve-2024-47535 (revision 1, source checked 26 Oct 2026, 16:35 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.4)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: io.netty:netty-common 4.1.115.Final. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven io.netty:netty-common: affected <= 4.1.114.Final; fixed in 4.1.115.Final

## Suggested inspection (read-only)
- Maven io.netty:netty-common: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on io.netty:netty-common.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-xq3w-v528-46rv (GitHub-reviewed advisory GHSA-xq3w-v528-46rv lists affected ranges: Maven io.netty:netty-common >=0 <=4.1.114.Final)

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