CVE catalog

CVE-2018-18508

nss: CVE-2018-18508

Severity: Medium · CVSS 6.5CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published: Jan 1, 2018, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.97% · Oct 27, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	nss	sid	`2:3.132-1`	fixed
Debian	nss	forky	`2:3.131.1-1`	fixed
Debian	nss	trixie	`2:3.110-1+deb13u4`	fixed
Debian	nss	trixie-security	`2:3.110-1+deb13u4`	fixed
Debian	nss	bookworm	`2:3.87.1-1+deb12u2`	fixed
Debian	nss	bookworm-security	`2:3.87.1-1+deb12u4`	fixed
Ubuntu	nss	14.04	`2:3.15.1-1ubuntu1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.2-1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3-1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3.1-1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3.1-1.1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3.1-1.1ubuntu1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu3`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu4`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu5`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu6`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu7`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu7.1`	vulnerable
Ubuntu	nss	14.04	`2:3.17-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.17.1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.17.1-0ubuntu0.14.04.2`	vulnerable
Ubuntu	nss	14.04	`2:3.17.4-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.19.2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.19.2.1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.19.2.1-0ubuntu0.14.04.2`	vulnerable
Ubuntu	nss	14.04	`2:3.21-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.21-0ubuntu0.14.04.2`	vulnerable
Ubuntu	nss	14.04	`2:3.23-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.26.2-0ubuntu0.14.04.3`	vulnerable
Ubuntu	nss	14.04	`2:3.28.4-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.28.4-0ubuntu0.14.04.2`	vulnerable
Ubuntu	nss	14.04	`2:3.28.4-0ubuntu0.14.04.3`	vulnerable
Ubuntu	nss	14.04	`2:3.28.4-0ubuntu0.14.04.4`	vulnerable
Ubuntu	nss	14.04	`2:3.28.4-0ubuntu0.14.04.5`	fixed
Ubuntu	nss	16.04	`2:3.19.2-1ubuntu1`	vulnerable
Ubuntu	nss	16.04	`2:3.19.2.1-0ubuntu1`	vulnerable
Ubuntu	nss	16.04	`2:3.21-1ubuntu2`	vulnerable
Ubuntu	nss	16.04	`2:3.21-1ubuntu3`	vulnerable
Ubuntu	nss	16.04	`2:3.21-1ubuntu4`	vulnerable
Ubuntu	nss	16.04	`2:3.23-0ubuntu0.16.04.1`	vulnerable
Ubuntu	nss	16.04	`2:3.26.2-0ubuntu0.16.04.2`	vulnerable
Ubuntu	nss	16.04	`2:3.28.4-0ubuntu0.16.04.1`	vulnerable
Ubuntu	nss	16.04	`2:3.28.4-0ubuntu0.16.04.2`	vulnerable
Ubuntu	nss	16.04	`2:3.28.4-0ubuntu0.16.04.3`	vulnerable
Ubuntu	nss	16.04	`2:3.28.4-0ubuntu0.16.04.4`	vulnerable
Ubuntu	nss	16.04	`2:3.28.4-0ubuntu0.16.04.5`	fixed
Ubuntu	nss	18.04	`2:3.32-1ubuntu3`	vulnerable
Ubuntu	nss	18.04	`2:3.34-1ubuntu1`	vulnerable
Ubuntu	nss	18.04	`2:3.35-2ubuntu2`	vulnerable
Ubuntu	nss	18.04	`2:3.35-2ubuntu2.1`	vulnerable
Ubuntu	nss	18.04	`2:3.35-2ubuntu2.2`	fixed
Ubuntu	nss	14.04	`2:3.15.1-1ubuntu1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.2-1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3-1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3.1-1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3.1-1.1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3.1-1.1ubuntu1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu3`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu4`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu5`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu6`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu7`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu7.1`	vulnerable
Ubuntu	nss	14.04	`2:3.17-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.17.1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.17.1-0ubuntu0.14.04.2`	vulnerable
Ubuntu	nss	14.04	`2:3.17.4-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.19.2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.19.2.1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.19.2.1-0ubuntu0.14.04.2`	vulnerable
Ubuntu	nss	14.04	`2:3.21-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.21-0ubuntu0.14.04.2`	vulnerable
Ubuntu	nss	14.04	`2:3.23-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.26.2-0ubuntu0.14.04.3`	vulnerable
Ubuntu	nss	14.04	`2:3.28.4-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.28.4-0ubuntu0.14.04.2`	vulnerable
Ubuntu	nss	14.04	`2:3.28.4-0ubuntu0.14.04.3`	vulnerable
Ubuntu	nss	14.04	`2:3.28.4-0ubuntu0.14.04.4`	vulnerable
Ubuntu	nss	14.04	`2:3.28.4-0ubuntu0.14.04.5`	fixed
Ubuntu	nss	16.04	`2:3.19.2-1ubuntu1`	vulnerable
Ubuntu	nss	16.04	`2:3.19.2.1-0ubuntu1`	vulnerable
Ubuntu	nss	16.04	`2:3.21-1ubuntu2`	vulnerable
Ubuntu	nss	16.04	`2:3.21-1ubuntu3`	vulnerable
Ubuntu	nss	16.04	`2:3.21-1ubuntu4`	vulnerable
Ubuntu	nss	16.04	`2:3.23-0ubuntu0.16.04.1`	vulnerable
Ubuntu	nss	16.04	`2:3.26.2-0ubuntu0.16.04.2`	vulnerable
Ubuntu	nss	16.04	`2:3.28.4-0ubuntu0.16.04.1`	vulnerable
Ubuntu	nss	16.04	`2:3.28.4-0ubuntu0.16.04.2`	vulnerable
Ubuntu	nss	16.04	`2:3.28.4-0ubuntu0.16.04.3`	vulnerable
Ubuntu	nss	16.04	`2:3.28.4-0ubuntu0.16.04.4`	vulnerable
Ubuntu	nss	16.04	`2:3.28.4-0ubuntu0.16.04.5`	fixed
Ubuntu	nss	18.04	`2:3.32-1ubuntu3`	vulnerable
Ubuntu	nss	18.04	`2:3.34-1ubuntu1`	vulnerable
Ubuntu	nss	18.04	`2:3.35-2ubuntu2`	vulnerable
Ubuntu	nss	18.04	`2:3.35-2ubuntu2.1`	vulnerable
Ubuntu	nss	18.04	`2:3.35-2ubuntu2.2`	fixed
Suse	mozilla-nspr	linux enterprise module for basesystem 15	`4.23-3.9.1`	fixed
Suse	mozilla-nss	linux enterprise module for basesystem 15	`3.47.1-3.22.1`	fixed
Suse	mozilla-nspr	linux enterprise module for basesystem 15 sp1	`4.23-3.9.1`	fixed
Suse	mozilla-nss	linux enterprise module for basesystem 15 sp1	`3.47.1-3.22.1`	fixed
Suse	mozilla-nss	linux enterprise module for server applications 15 sp1	`3.47.1-3.22.1`	fixed
Opensuse	mozilla-nspr	leap 15.1	`4.23-lp151.2.6.1`	fixed
Opensuse	mozilla-nss	leap 15.1	`3.47.1-lp151.2.9.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	nss	source	sid	`2:3.42.1-1`	not yet assigned	Not reported	[921614]
Debian	nss	source	forky	`2:3.42.1-1`	not yet assigned	Not reported	[921614]
Debian	nss	source	trixie	`2:3.42.1-1`	not yet assigned	Not reported	[921614]
Debian	nss	source	bookworm	`2:3.42.1-1`	not yet assigned	Not reported	[921614]
Ubuntu	nss	deb	14.04	`2:3.28.4-0ubuntu0.14.04.5`	Not reported	UBUNTU-CVE-2018-18508	Not reported
Ubuntu	nss	deb	16.04	`2:3.28.4-0ubuntu0.16.04.5`	Not reported	UBUNTU-CVE-2018-18508	Not reported
Ubuntu	nss	deb	18.04	`2:3.35-2ubuntu2.2`	Not reported	UBUNTU-CVE-2018-18508	Not reported
Ubuntu	nss	deb	14.04	`2:3.28.4-0ubuntu0.14.04.5`	Not reported	USN-3898-1	Not reported
Ubuntu	nss	deb	16.04	`2:3.28.4-0ubuntu0.16.04.5`	Not reported	USN-3898-1	Not reported
Ubuntu	nss	deb	18.04	`2:3.35-2ubuntu2.2`	Not reported	USN-3898-1	Not reported
Suse	mozilla-nspr	rpm	linux enterprise module for basesystem 15	`4.23-3.9.1`	Not reported	SUSE-SU-2019:3395-1	Not reported
Suse	mozilla-nss	rpm	linux enterprise module for basesystem 15	`3.47.1-3.22.1`	Not reported	SUSE-SU-2019:3395-1	Not reported
Suse	mozilla-nspr	rpm	linux enterprise module for basesystem 15 sp1	`4.23-3.9.1`	Not reported	SUSE-SU-2019:3395-1	Not reported
Suse	mozilla-nss	rpm	linux enterprise module for basesystem 15 sp1	`3.47.1-3.22.1`	Not reported	SUSE-SU-2019:3395-1	Not reported
Suse	mozilla-nss	rpm	linux enterprise module for server applications 15 sp1	`3.47.1-3.22.1`	Not reported	SUSE-SU-2019:3395-1	Not reported
Opensuse	mozilla-nspr	rpm	leap 15.1	`4.23-lp151.2.6.1`	Not reported	OPENSUSE-SU-2020:0008-1	Not reported
Opensuse	mozilla-nss	rpm	leap 15.1	`3.47.1-lp151.2.9.1`	Not reported	OPENSUSE-SU-2020:0008-1	Not reported

[Debian bug #921614]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libnss3]Unknown
Source package: [nss]
Details (4)
- 2:3.87.1-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
[libnss3-dev]Unknown
Source package: [nss]
Details (4)
- 2:3.87.1-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
[libnss3-tools]Unknown
Source package: [nss]
Details (4)
- 2:3.87.1-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12

[Debian 13 (Trixie)]

[libnss3]Unknown
Source package: [nss]
Details (4)
- 2:3.110-1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u4 · amd64 · trixie-security
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u4 · arm64 · trixie-security
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · 13
[libnss3-dev]Unknown
Source package: [nss]
Details (4)
- 2:3.110-1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u4 · amd64 · trixie-security
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u4 · arm64 · trixie-security
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · 13
[libnss3-tools]Unknown
Source package: [nss]
Details (4)
- 2:3.110-1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u4 · amd64 · trixie-security
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u4 · arm64 · trixie-security
  Fixed · Fixed: 2:3.42.1-1
  dsa · nss · debian · 13

Observed: Oct 23, 2026, 5:35:38 PM UTC

References

[CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]