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Fencer Vulns
high 7.5

CVE-2016-5285 json

A Null pointer dereference vulnerability exists in Mozilla Network Security Services due to a missing NULL check in PK11_SignWithSymKey / s…

published 2019-11-15 6 y ago modified 2026-06-17 4 mo ago also EUVD-2016-6236

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.3%
EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits
0
none known

Summary

A Null pointer dereference vulnerability exists in Mozilla Network Security Services due to a missing NULL check in PK11_SignWithSymKey / ssl3_ComputeRecordMACConstantTime, which could let a remote malicious user cause a Denial of Service.

Patch / fix

  • mozilla nss 3.26
  • nss Debian 14, Debian 13, Debian 12 2:3.25-1

debian advisories DEBIAN-CVE-2016-5285

  • nss Ubuntu 14.04 LTS 2:3.26.2-0ubuntu0.14.04.3
  • nss Ubuntu 16.04 LTS 2:3.26.2-0ubuntu0.16.04.2

ubuntu advisories UBUNTU-CVE-2016-5285

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • nss RHEL 5 3.21.3-2.el5_11
  • nss RHEL 6 3.21.3-2.el6_8
  • nss RHEL 7 3.21.3-2.el7_3
  • nss-util RHEL 6 3.21.3-1.el6_8
  • nss-util RHEL 7 3.21.3-1.1.el7_3
  • nss-tools RHEL 5 3.21.3-2.el5_11
  • nss-tools RHEL 6 3.21.3-2.el6_8
  • nss-tools RHEL 7 3.21.3-2.el7_3

red hat advisories RHSA-2016:2779

  • mozilla-nss SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +6 more 3.21.3-39.1
  • MozillaFirefox SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +6 more 45.5.1esr-59.1
  • mozilla-nss SLES for SAP 12 SP2, SLES for SAP 12 SP1, SLES for SAP 12 +8 more 3.21.3-50.1
  • MozillaFirefox SLES for SAP 12 SP2, SLES for SAP 12 SP1, SLES for SAP 12 +8 more 45.5.0esr-88.1
  • mozilla-nss SLES 11 SP2-LTSS 3.21.3-30.1
  • MozillaFirefox SLES 11 SP2-LTSS 45.5.1esr-63.1

suse advisories SUSE-SU-2016:3105-1SUSE-SU-2016:3080-1SUSE-SU-2016:3014-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-5285 updated cvss 7.5

nss: Missing NULL check in PK11_SignWithSymKey / ssl3_ComputeRecordMACConstantTime causes server crash

  • Red Hat Enterprise Linux (v. 5 server) nss 3.21.3-2.el5_11, nss-tools 3.21.3-2.el5_11 Red Hat Enterprise Linux Client (v. 7) nss 3.21.3-2.el7_3, nss-tools 3.21.3-2.el7_3, nss-util 3.21.3-1.1.el7_3, nss-sysinit 3.21.3-2.el7_3 Red Hat Enterprise Linux Client Optional (v. 7) nss-devel 3.21.3-2.el7_3, nss-debuginfo 3.21.3-2.el7_3, nss-pkcs11-devel 3.21.3-2.el7_3, nss-util-devel 3.21.3-1.1.el7_3, nss-util-debuginfo 3.21.3-1.1.el7_3 Red Hat Enterprise Linux ComputeNode (v. 7) nss 3.21.3-2.el7_3, nss-tools 3.21.3-2.el7_3, nss-util 3.21.3-1.1.el7_3, nss-sysinit 3.21.3-2.el7_3 Red Hat Enterprise Linux ComputeNode Optional (v. 7) nss-devel 3.21.3-2.el7_3, nss-debuginfo 3.21.3-2.el7_3, nss-pkcs11-devel 3.21.3-2.el7_3, nss-util-devel 3.21.3-1.1.el7_3, nss-util-debuginfo 3.21.3-1.1.el7_3 Red Hat Enterprise Linux Desktop (v. 5 client) nss 3.21.3-2.el5_11, nss-tools 3.21.3-2.el5_11
    +13 more products
    Red Hat Enterprise Linux Desktop (v. 6) nss 3.21.3-2.el6_8, nss-util 3.21.3-1.el6_8, nss-tools 3.21.3-2.el6_8, nss-sysinit 3.21.3-2.el6_8 Red Hat Enterprise Linux Desktop Optional (v. 6) nss-devel 3.21.3-2.el6_8, nss-debuginfo 3.21.3-2.el6_8, nss-util-devel 3.21.3-1.el6_8, nss-pkcs11-devel 3.21.3-2.el6_8, nss-util-debuginfo 3.21.3-1.el6_8 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) nss 3.21.3-2.el5_11 Red Hat Enterprise Linux HPC Node (v. 6) nss 3.21.3-2.el6_8, nss-util 3.21.3-1.el6_8, nss-tools 3.21.3-2.el6_8, nss-sysinit 3.21.3-2.el6_8 Red Hat Enterprise Linux HPC Node Optional (v. 6) nss-devel 3.21.3-2.el6_8, nss-debuginfo 3.21.3-2.el6_8, nss-util-devel 3.21.3-1.el6_8, nss-pkcs11-devel 3.21.3-2.el6_8, nss-util-debuginfo 3.21.3-1.el6_8 Red Hat Enterprise Linux Server (v. 6) nss 3.21.3-2.el6_8, nss-util 3.21.3-1.el6_8, nss-tools 3.21.3-2.el6_8, nss-sysinit 3.21.3-2.el6_8 Red Hat Enterprise Linux Server (v. 7) nss 3.21.3-2.el7_3, nss-tools 3.21.3-2.el7_3, nss-util 3.21.3-1.1.el7_3, nss-sysinit 3.21.3-2.el7_3 Red Hat Enterprise Linux Server Optional (v. 6) nss-debuginfo 3.21.3-2.el6_8, nss-pkcs11-devel 3.21.3-2.el6_8 Red Hat Enterprise Linux Server Optional (v. 7) nss-debuginfo 3.21.3-2.el7_3, nss-pkcs11-devel 3.21.3-2.el7_3 Red Hat Enterprise Linux Workstation (v. 6) nss 3.21.3-2.el6_8, nss-util 3.21.3-1.el6_8, nss-tools 3.21.3-2.el6_8, nss-sysinit 3.21.3-2.el6_8 Red Hat Enterprise Linux Workstation (v. 7) nss 3.21.3-2.el7_3, nss-tools 3.21.3-2.el7_3, nss-util 3.21.3-1.1.el7_3, nss-sysinit 3.21.3-2.el7_3 Red Hat Enterprise Linux Workstation Optional (v. 6) nss-debuginfo 3.21.3-2.el6_8, nss-pkcs11-devel 3.21.3-2.el6_8 Red Hat Enterprise Linux Workstation Optional (v. 7) nss-debuginfo 3.21.3-2.el7_3, nss-pkcs11-devel 3.21.3-2.el7_3
    fixed: vendor fix RHSA-2016:2779

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.28% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • Mozilla Network Security Services

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.