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Fencer Intel
medium 5.3

CVE-2017-5462 json

A flaw in DRBG number generation within the Network Security Services (NSS) library where the internal state V does not correctly carry bit…

published 2018-06-11 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-14566

cvss
5.3
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.6%
EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

A flaw in DRBG number generation within the Network Security Services (NSS) library where the internal state V does not correctly carry bits over. The NSS library has been updated to fix this issue to address this issue and Firefox ESR 52.1 has been updated with NSS version 3.28.4. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

Patch / fix

  • Mozilla Thunderbird 52.1
  • Mozilla Firefox ESR 45.9, 52.1
  • Mozilla Firefox 53
  • nss Debian 14, Debian 13, Debian 12 2:3.26.2-1.1
  • firefox-esr Debian 14, Debian 13, Debian 12 45.9.0esr-1

debian advisories DEBIAN-CVE-2017-5462

  • nss Ubuntu 14.04 LTS 2:3.28.4-0ubuntu0.14.04.1
  • nss Ubuntu 16.04 LTS 2:3.28.4-0ubuntu0.16.04.1
  • firefox Ubuntu 14.04 LTS 53.0+build6-0ubuntu0.14.04.1
  • firefox Ubuntu 16.04 LTS 53.0+build6-0ubuntu0.16.04.1
  • thunderbird Ubuntu 14.04 LTS 1:52.1.1+build1-0ubuntu0.14.04.1
  • thunderbird Ubuntu 16.04 LTS 1:52.1.1+build1-0ubuntu0.16.04.1

ubuntu advisories UBUNTU-CVE-2017-5462

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

  • mozilla-nss SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +3 more 3.29.5-47.3.2
  • firefox-gcc5 SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +2 more 5.3.1+r233831-7.1
  • MozillaFirefox SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +3 more 52.2.0esr-72.5.2
  • firefox-libffi-gcc5 SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +2 more 5.3.1+r233831-7.1
  • MozillaFirefox-branding-SLED SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +2 more 52-24.3.44
  • MozillaFirefox-branding-SLE SLES for SAP 12 SP2, SLES for SAP 12 SP1, SLES for SAP 12 +6 more 52-31.1
  • MozillaFirefox SLES for SAP 12 SP2, SLES for SAP 12 SP1, SLES for SAP 12 +7 more 52.2.0esr-108.3
  • java-1_8_0-openjdk SLES for SAP 12 SP2, SLES for SAP 12 SP1, SLES for Raspberry Pi 12 SP2 +4 more 1.8.0.121-23.4

suse advisories SUSE-SU-2017:2235-1SUSE-SU-2017:1669-1SUSE-SU-2017:1248-1SUSE-SU-2017:1175-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 92.0-1.2
  • MozillaThunderbird openSUSE Tumbleweed 91.1.1-1.1
  • MozillaThunderbird Package Hub 12 52.1.0-30.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10600-1openSUSE-SU-2024:10601-1openSUSE-SU-2017:1268-1

  • nss Alpine 3.4, Alpine 3.3 3.23-r1

alpine advisories ALPINE-CVE-2017-5462

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2017-5462 updated cvss 4.8

nss: DRBG flaw in NSS

  • Red Hat Enterprise Linux 5 nss Red Hat Enterprise Linux 6 nss, nss-tools, nss-sysinit Red Hat Enterprise Linux 7 nss, nss-tools, nss-sysinit
    not affected: vulnerable code not present

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

2.59% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected products

  • Mozilla Thunderbird
  • Mozilla Firefox ESR
  • Mozilla Firefox

Classification

Weakness

References

Sources

Fencer Intel 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.