What’s Vulnerable › Vulnerabilities

CVE-2018-18956

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-11-05 · updated 2026-06-17
• Weakness: CWE-119

Description

The ProcessMimeEntity function in util-decode-mime.c in Suricata 4.x before 4.0.6 allows remote attackers to cause a denial of service (segfault and daemon crash) via crafted input to the SMTP parser, as exploited in the wild in November 2018.

Affected products

• Suricata-Ids Suricata: from 4.0.0 before 4.0.6 — fixed in 4.0.6

How to fix

Upgrade to a fixed version: Suricata-Ids Suricata 4.0.6. Check the vendor advisory for mitigations.

References

• https://lists.openinfosecfoundation.org/pipermail/oisf-users/2018-November/016316.html
• https://lists.openinfosecfoundation.org/pipermail/oisf-users/2018-October/016227.html
• https://redmine.openinfosecfoundation.org/issues/2658#change-10374
• https://lists.openinfosecfoundation.org/pipermail/oisf-users/2018-November/016316.html
• https://lists.openinfosecfoundation.org/pipermail/oisf-users/2018-October/016227.html
• https://redmine.openinfosecfoundation.org/issues/2658#change-10374

Get alerted when CVE-2018-18956 or the next vulnerability affects your stack