What’s Vulnerable › Vulnerabilities

CVE-2024-28870: Suricata uses excessive resource use in malformed ssh traffic parsing

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-04-03 · updated 2026-06-17
• Weakness: CWE-770

Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine developed by the OISF and the Suricata community. When parsing an overly long SSH banner, Suricata can use excessive CPU resources, as well as cause excessive logging volume in alert records. This issue has been patched in versions 6.0.17 and 7.0.4.

Affected products

• OISF suricata: before 6.0.17; from 7.0.0 before 7.0.4 — fixed in 6.0.17, 7.0.4

How to fix

Upgrade to a fixed version: OISF suricata 6.0.17, 7.0.4. Check the vendor advisory for mitigations.

References

• https://github.com/OISF/suricata/security/advisories/GHSA-mhhx-xw7r-r5c8
• https://github.com/OISF/suricata/security/advisories/GHSA-mhhx-xw7r-r5c8

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