CVE-2018-18956

Name: CVE-2018-18956
Creator: NVD / NIST
Published: 2018-11-05T21:29:00.257+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.79%

Last modified Jun 17, 2026

CVE-2018-18956 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.79% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

2.79%

84.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Suricata-Ids	Suricata	>= 4.0.0, < 4.0.6

References

https://lists.openinfosecfoundation.org/pipermail/oisf-users/2018-November/016316.htmlMailing List, Third Party Advisory
https://lists.openinfosecfoundation.org/pipermail/oisf-users/2018-October/016227.htmlMailing List, Third Party Advisory
https://redmine.openinfosecfoundation.org/issues/2658#change-10374Third Party Advisory
https://lists.openinfosecfoundation.org/pipermail/oisf-users/2018-November/016316.htmlMailing List, Third Party Advisory
https://lists.openinfosecfoundation.org/pipermail/oisf-users/2018-October/016227.htmlMailing List, Third Party Advisory
https://redmine.openinfosecfoundation.org/issues/2658#change-10374Third Party Advisory

Timeline

Published: Nov 5, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-18956?

How severe is CVE-2018-18956?

Severity scoring for CVE-2018-18956 is pending analysis. The EPSS model estimates a 2.79% probability of exploitation in the next 30 days.

How do I fix CVE-2018-18956?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-18956?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST