The ProcessMimeEntity function in util-decode-mime.c in Suricata 4.x before 4.0.6 allows…
Priority LOW 38CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.02818 86th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:suricata-ids:suricata:*:*:*:*:*:*:*:* | 4.0.0 to before 4.0.6 | Vulnerable | Suricata-ids |
- cpe:2.3:a:suricata-ids:suricata:*:*:*:*:*:*:*:* Versions 4.0.0 to before 4.0.6 Vulnerable ·Suricata-ids
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2018-18956
- 2026-10-03 Alias added: GHSA-mhv4-xgrg-gg58
References
More Suricata-ids Suricata vulnerabilities
- TI-2019-12341 An issue was discovered in Suricata 4.1.4. CVSS 3.1CRITICAL 9.8
- TI-2019-07379 An issue was discovered in Suricata 4.1.x before 4.1.4. CVSS 3.0CRITICAL 9.8
- TI-2018-04969 Suricata before 4.0.4 is prone to an HTTP detection bypass vulnerability in detect.c and… CVSS 3.0MEDIUM 5.3
- TI-2019-12340 An issue was discovered in Suricata 4.1.4. CVSS 3.1CRITICAL 9.1
- TI-2019-11781 An issue was discovered in app-layer-ssl.c in Suricata 4.1.4. CVSS 3.1CRITICAL 9.1
- TI-2019-07378 An issue was discovered in Suricata 4.1.3. CVSS 3.0HIGH 7.5
Sources
- CVE-2018-18956 · CVE Program
- CVE-2018-18956 · NVD
- FIRST EPSS
- GHSA-mhv4-xgrg-gg58 · GitHub Advisory Database · CC BY 4.0
- CVE-2018-18956 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences