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Fencer Vulns
critical 9.8

CVE-2017-5429 json

Memory safety bugs were reported in Firefox 52, Firefox ESR 45.8, Firefox ESR 52, and Thunderbird 52.

published 2018-06-11 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-14533

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.4%
EPSS 3.4% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

Memory safety bugs were reported in Firefox 52, Firefox ESR 45.8, Firefox ESR 52, and Thunderbird 52. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. 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
  • firefox-esr Debian 14, Debian 13, Debian 12 45.9.0esr-1

debian advisories DEBIAN-CVE-2017-5429

  • 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-2017-5429

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

  • firefox RHEL 7 52.1.0-2.el7_3
  • firefox RHEL 6 52.1.0-2.el6_9
  • thunderbird RHEL 6 52.1.0-1.el6_9
  • thunderbird RHEL 7 52.1.0-1.el7_3

red hat advisories RHSA-2017:1106RHSA-2017:1104RHSA-2017:1201

  • 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

  • firefox Arch Linux 53.0-1

arch linux advisories AVG-249

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-2017-5429 updated cvss 9.8

Mozilla: Memory safety bugs fixed in Firefox 53, Firefox ESR 45.9, and Firefox ESR 52.1 (MFSA 2017-11, MFSA 2017-12)

  • Red Hat Enterprise Linux 5 firefox, thunderbird
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) firefox 52.1.0-2.el7_3, thunderbird 52.1.0-1.el7_3
    fixed: vendor fix RHSA-2017:1201
  • Red Hat Enterprise Linux Client Optional (v. 7) firefox 52.1.0-2.el7_3
    fixed: vendor fix RHSA-2017:1106
  • Red Hat Enterprise Linux Desktop (v. 6) firefox 52.1.0-2.el6_9, thunderbird 52.1.0-1.el6_9 Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 52.1.0-2.el6_9 Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 52.1.0-2.el6_9 Red Hat Enterprise Linux Server (v. 6) firefox 52.1.0-2.el6_9
    fixed: vendor fix RHSA-2017:1104
  • Red Hat Enterprise Linux Server (v. 7) firefox 52.1.0-2.el7_3
    fixed: vendor fix RHSA-2017:1106
  • Red Hat Enterprise Linux Server Optional (v. 6) firefox 52.1.0-2.el6_9, thunderbird 52.1.0-1.el6_9
    fixed: vendor fix RHSA-2017:1104
  • Red Hat Enterprise Linux Server Optional (v. 7) firefox 52.1.0-2.el7_3, thunderbird 52.1.0-1.el7_3
    fixed: vendor fix RHSA-2017:1201
  • Red Hat Enterprise Linux Workstation (v. 6) firefox 52.1.0-2.el6_9, thunderbird 52.1.0-1.el6_9
    fixed: vendor fix RHSA-2017:1104
show 3 more
  • Red Hat Enterprise Linux Workstation (v. 7) firefox 52.1.0-2.el7_3, thunderbird 52.1.0-1.el7_3
    fixed: vendor fix RHSA-2017:1201
  • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 52.1.0-2.el6_9
    fixed: vendor fix RHSA-2017:1104
  • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 52.1.0-2.el7_3
    fixed: vendor fix RHSA-2017:1106

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

3.44% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Mozilla Thunderbird
  • Mozilla Firefox ESR
  • Mozilla Firefox

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

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.