netty up to 4.1.117.Final Packet denial of service

Summaryinfo

A vulnerability was found in netty up to 4.1.117.Final. It has been declared as problematic. Impacted is an unknown function of the component Packet Handler. Executing a manipulation can lead to denial of service. This vulnerability appears as CVE-2025-24970. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in netty up to 4.1.117.Final and classified as problematic. This vulnerability affects some unknown processing of the component Packet Handler. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. CVE summarizes:

Netty, an asynchronous, event-driven network application framework, has a vulnerability starting in version 4.1.91.Final and prior to version 4.1.118.Final. When a special crafted packet is received via SslHandler it doesn't correctly handle validation of such a packet in all cases which can lead to a native crash. Version 4.1.118.Final contains a patch. As workaround its possible to either disable the usage of the native SSLEngine or change the code manually.

The advisory is shared for download at github.com. This vulnerability was named CVE-2025-24970 since 01/29/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 216507 (SUSE SLED15 / SLES15 / openSUSE 15 Security Update : netty, netty-tcnative (SUSE-SU-2025:0590-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.1.118.Final eliminates this vulnerability. Applying the patch 87f40725155b2f89adfde68c7732f97c153676c4 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (216507) and CERT Bund (WID-SEC-2025-1675). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

• IBM Tivoli Business Service Manager
• HCL Commerce
• IBM Security Guardium
• IBM DB2

Productinfo

Name

• netty

Version

• 4.1.117.Final

License

• open-source

Website

• Product: https://github.com/netty/netty/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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