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Vulnerability record · CVE-2018-18508 · published 22 October 2020

CVE-2018-18508: Mozilla network security services null pointer dereference vulnerability

Mozilla · Network Security Services

In Network Security Services (NSS) before 3.36.7 and before 3.41.1, a malformed signature can cause a crash due to a null dereference, resulting in a Denial of Service.

6.5 CVSS 3.1 Medium EPSS 2.0% · top 20.4% CWE-476 · NULL pointer dereference
6.5CVSS 3.1 base score, v2 4.3
2.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
9Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

In Network Security Services (NSS) before 3.36.7 and before 3.41.1, a malformed signature can cause a crash due to a null dereference, resulting in a Denial of Service.

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

Affected products

9 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert-portal.siemens.com/productcert/pdf/ssa-379803.pdf Third Party Advisory
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.36.7_release_notes Release NotesVendor Advisory
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.41.1_release_notes Release NotesVendor Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-040-04 Third Party AdvisoryUS Government Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-379803.pdf Third Party Advisory
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.36.7_release_notes Release NotesVendor Advisory
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.41.1_release_notes Release NotesVendor Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-040-04 Third Party AdvisoryUS Government Resource

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-18508), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.