CVE-2025-64335: suricata Null Dereference — Fix

Description

Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In versions from 8.0.0 to before 8.0.2, a NULL dereference can occur when the entropy keyword is used in conjunction with base64_data. This issue has been patched in version 8.0.2. A workaround involves disabling rules that use entropy in conjunction with base64_data.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
oisf	suricata	8.0.0 — 8.0.2

References

Advisories & Patches

https://github.com/OISF/suricata/commit/c935f08cd988600fd0a4f828a585b181dd5de012

Other References

https://github.com/OISF/suricata/security/advisories/GHSA-v299-h7p3-q4f2 https://www.vicarius.io/vsociety/posts/cve-2025-64335-detect-suricata-vulnerability https://www.vicarius.io/vsociety/posts/cve-2025-64335-mitigate-suricata-vulnerability

Frequently Asked Questions

What is CVE-2025-64335? +

Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In versions from 8.0.0 to before 8.0.2, a NULL dereference can occur when the entropy keyword is used in conjunction with base64_data. This issue has been patched in version 8.0.2. A workaround involves disabling rules that use entropy in conjunction with base64_data. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-64335? +

CVE-2025-64335 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-64335? +

CVE-2025-64335 affects products from oisf, specifically: suricata. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-64335? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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