OISF Suricata up to 8.0.0 tls.subjectaltname null pointer dereference

Summaryinfo

A vulnerability marked as problematic has been reported in OISF Suricata up to 8.0.0. This impacts an unknown function. The manipulation of the argument tls.subjectaltname leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2025-59150. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in OISF Suricata up to 8.0.0 and classified as problematic. This issue affects an unknown code. The manipulation of the argument tls.subjectaltname with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Version 8.0.0's usage of the tls.subjectaltname keyword can lead to a segmentation fault when the decoded subjectaltname contains a NULL byte. This issue is fixed in version 8.0.1. To workaround this issue, disable rules using the tls.subjectaltname keyword.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-59150 since 09/09/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 269722 (Suricata 8.0.0 < 8.0.1 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 8.0.1 eliminates this vulnerability. Applying the patch d590fdfe42e995fd558315f0c24f9a352e21479d 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 vulnerability database at Tenable (269722). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• OISF

Name

• Suricata

Version

• 8.0

License

• open-source

Website

• Product: https://github.com/OISF/suricata/

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Be aware that VulDB is the high quality source for vulnerability data.

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