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Fencer Intel
high 8.8

CVE-2019-17008 json

When using nested workers, a use-after-free could occur during worker destruction.

published 6y ago modified 4mo ago also EUVD-2019-7482

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

When using nested workers, a use-after-free could occur during worker destruction. This resulted in a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

Patch / fix

  • mozilla firefox 71.0
  • mozilla firefox_esr 68.3
  • mozilla thunderbird 68.3
  • firefox-esr Debian 14, Debian 13, Debian 12 68.3.0esr-1
  • thunderbird Debian 14, Debian 13, Debian 12 1:68.3.0-1

debian advisories DEBIAN-CVE-2019-17008

  • firefox Ubuntu 16.04 LTS 71.0+build5-0ubuntu0.16.04.1
  • firefox Ubuntu 18.04 LTS 71.0+build5-0ubuntu0.18.04.1
  • firefox Ubuntu 20.04 LTS 71.0+build5-0ubuntu1
  • thunderbird Ubuntu 16.04 LTS 1:68.7.0+build1-0ubuntu0.16.04.2
  • thunderbird Ubuntu 18.04 LTS 1:68.4.1+build1-0ubuntu0.18.04.1
  • thunderbird Ubuntu 20.04 LTS 1:68.3.0+build2-0ubuntu1

ubuntu advisories UBUNTU-CVE-2019-17008

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

  • thunderbird RHEL 6 68.3.0-3.el6_10
  • thunderbird RHEL 8 68.3.0-2.el8_1
  • thunderbird RHEL 7 68.3.0-1.el7_7
  • firefox RHEL 8 68.3.0-1.el8_1
  • firefox RHEL 7 68.3.0-1.el7_7
  • firefox RHEL 6 68.3.0-1.el6_10
  • firefox RHEL 8.0 E4S 68.4.1-1.el8_0
  • thunderbird RHEL 8.0 E4S 68.4.1-2.el8_0

red hat advisories RHSA-2020:0295RHSA-2020:0292RHSA-2019:4205RHSA-2019:4195RHSA-2019:4148RHSA-2019:4111

  • MozillaFirefox SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +17 more 68.3.0-109.98.1
  • MozillaThunderbird SLE Workstation Extension 15 SP1, SLE Workstation Extension 15 68.3.0-3.61.2
  • MozillaFirefox SLE Module for Desktop Applications 15 SP1, SLE Module for Desktop Applications 15 68.3.0-3.62.2
  • mozilla-nss SLES 11 SP4-LTSS 3.47.1-38.12.1
  • mozilla-nspr SLES 11 SP4-LTSS 4.23-29.9.1
  • MozillaFirefox SLES 11 SP4-LTSS 68.3.0-78.54.1

suse advisories SUSE-SU-2019:14260-1SUSE-SU-2019:3347-1SUSE-SU-2019:3339-1SUSE-SU-2019:3337-1

  • 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 openSUSE Leap 15.1 68.3.0-lp151.2.19.1
  • MozillaFirefox openSUSE Leap 15.1 68.3.0-lp151.2.21.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10600-1openSUSE-SU-2024:10601-1openSUSE-SU-2020:0003-1openSUSE-SU-2020:0002-1

  • firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +10 more 68.3.0-r0

alpine advisories ALPINE-CVE-2019-17008

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

  • firefox Arch Linux 71.0-1
  • thunderbird Arch Linux 68.3.0-1

arch linux advisories AVG-1071AVG-1072

Is CVE-2019-17008 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2019-17008 updated cvss 8.8

Mozilla: Use-after-free in worker destruction

  • Red Hat Enterprise Linux 5 firefox, thunderbird
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) firefox 68.3.0-1.el8_1, thunderbird 68.3.0-2.el8_1
    fixed: vendor fix RHSA-2019:4111
  • Red Hat Enterprise Linux AppStream E4S (v. 8.0) firefox 68.4.1-1.el8_0, thunderbird 68.4.1-2.el8_0
    fixed: vendor fix RHSA-2020:0295
  • Red Hat Enterprise Linux Client (v. 7) firefox 68.3.0-1.el7_7, thunderbird 68.3.0-1.el7_7 Red Hat Enterprise Linux Client Optional (v. 7) firefox 68.3.0-1.el7_7
    fixed: vendor fix RHSA-2019:4107
  • Red Hat Enterprise Linux Desktop (v. 6) firefox 68.3.0-1.el6_10, thunderbird 68.3.0-3.el6_10 Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 68.3.0-1.el6_10 Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 68.3.0-1.el6_10 Red Hat Enterprise Linux Server (v. 6) firefox 68.3.0-1.el6_10
    fixed: vendor fix RHSA-2019:4108
  • Red Hat Enterprise Linux Server (v. 7) firefox 68.3.0-1.el7_7
    fixed: vendor fix RHSA-2019:4107
  • Red Hat Enterprise Linux Server Optional (v. 6) firefox 68.3.0-1.el6_10, thunderbird 68.3.0-3.el6_10
    fixed: vendor fix RHSA-2019:4108
  • Red Hat Enterprise Linux Server Optional (v. 7) firefox 68.3.0-1.el7_7, thunderbird 68.3.0-1.el7_7
    fixed: vendor fix RHSA-2019:4107
show 4 more
  • Red Hat Enterprise Linux Workstation (v. 6) firefox 68.3.0-1.el6_10, thunderbird 68.3.0-3.el6_10
    fixed: vendor fix RHSA-2019:4108
  • Red Hat Enterprise Linux Workstation (v. 7) firefox 68.3.0-1.el7_7, thunderbird 68.3.0-1.el7_7
    fixed: vendor fix RHSA-2019:4107
  • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 68.3.0-1.el6_10
    fixed: vendor fix RHSA-2019:4108
  • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 68.3.0-1.el7_7
    fixed: vendor fix RHSA-2019:4107

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

1.88% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

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.