CVE-2025-2259 Eclipse ThreadX NetX Duo component HTTP server single PUT request integer underflow

Medium 5.3 Published 6 Apr 2025 Updated 14 Apr 2025

An attacker can cause a denial of service in Eclipse ThreadX NetX Duo via an integer underflow in the HTTP server when handling crafted PUT requests.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-2259?

CVE-2025-2259 is a medium-severity vulnerability in Eclipse Foundation ThreadX, published on 6 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

In NetX HTTP server functionality of Eclipse ThreadX NetX Duo before version 6.4.3, an attacker can cause an integer underflow and a subsequent denial of service by writing a very large file, by specially crafted packets with Content-Length in one packet smaller than the data request size of the other packet. A possible workaround is to disable HTTP PUT support.

This issue follows an incomplete fix of CVE-2025-0727

Weakness: CWE-191

Which versions are affected by CVE-2025-2259?

It affects 1 product.

Products include Eclipse Threadx Netx Duo.

How do I fix CVE-2025-2259?

No fix has been published for CVE-2025-2259 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-2259 being exploited?

There is no known exploitation of CVE-2025-2259 in the wild and no public exploit code.

Sources

Also known as GHSA-chhp-gmxc-46rq.