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Fencer Intel
high 8.8

CVE-2019-11758 json

Mozilla community member Philipp reported a memory safety bug present in Firefox 68 when 360 Total Security was installed.

published 6y ago modified 4mo ago also EUVD-2019-3428

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits
0
none known

Summary

Mozilla community member Philipp reported a memory safety bug present in Firefox 68 when 360 Total Security was installed. This bug showed evidence of memory corruption in the accessibility engine and we presume that with enough effort that it could be exploited to run arbitrary code. This vulnerability affects Firefox < 69, Thunderbird < 68.2, and Firefox ESR < 68.2.

Patch / fix

  • mozilla firefox 69.0
  • mozilla firefox_esr 68.2
  • mozilla thunderbird 68.2
  • thunderbird RHEL 6 68.2.0-2.el6_10
  • firefox RHEL 6 68.2.0-4.el6_10
  • thunderbird RHEL 7 68.2.0-1.el7_7
  • thunderbird RHEL 8 68.2.0-1.el8_0
  • firefox RHEL 7 68.2.0-1.el7_7
  • firefox RHEL 8 68.2.0-2.el8_0

red hat advisories RHSA-2019:3756RHSA-2019:3281RHSA-2019:3210RHSA-2019:3237RHSA-2019:3193RHSA-2019:3196

  • MozillaThunderbird SLE Workstation Extension 15 SP1, SLE Workstation Extension 15 68.2.1-3.58.1
  • MozillaFirefox SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +17 more 68.2.0-109.95.2
  • MozillaFirefox-branding-SLE SLE Module for Desktop Applications 15 SP1, SLE Module for Desktop Applications 15 68-4.11.2
  • MozillaFirefox SLE Module for Desktop Applications 15 SP1, SLE Module for Desktop Applications 15 68.2.0-3.59.1
  • firefox-atk SLES 11 SP4-LTSS 2.26.1-2.8.4
  • mozilla-nss SLES 11 SP4-LTSS 3.45-38.9.3
  • firefox-gtk3 SLES 11 SP4-LTSS 3.10.9-2.15.3
  • mozilla-nspr SLES 11 SP4-LTSS 4.21-29.6.1

suse advisories SUSE-SU-2019:14246-1SUSE-SU-2019:2912-1SUSE-SU-2019:2872-1SUSE-SU-2019:2871-1

  • MozillaThunderbird openSUSE Tumbleweed 91.1.1-1.1
  • MozillaThunderbird openSUSE Leap 15.0 68.2.1-lp150.3.54.1
  • MozillaFirefox openSUSE Leap 15.0 68.2.0-lp150.3.71.1
  • firefox-esr-branding-openSUSE openSUSE Leap 15.0 68-lp150.3.3.1
  • MozillaFirefox-branding-openSUSE openSUSE Leap 15.0 68-lp150.3.3.1
  • MozillaThunderbird openSUSE Leap 15.1 68.2.1-lp151.2.16.1
  • MozillaFirefox openSUSE Leap 15.1 68.2.0-lp151.2.18.2
  • firefox-esr-branding-openSUSE openSUSE Leap 15.1 68-lp151.3.3.1

opensuse advisories openSUSE-SU-2024:10601-1openSUSE-SU-2019:2464-1openSUSE-SU-2019:2459-1openSUSE-SU-2019:2452-1openSUSE-SU-2019:2451-1

  • firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +10 more 68.2.0-r0

alpine advisories ALPINE-CVE-2019-11758

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

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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-2019-11758 updated cvss 8.8

Mozilla: Potentially exploitable crash due to 360 Total Security

  • Red Hat Enterprise Linux 5 firefox, thunderbird
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) firefox 68.2.0-2.el8_0, thunderbird 68.2.0-1.el8_0
    fixed: vendor fix RHSA-2019:3196
  • Red Hat Enterprise Linux Client (v. 7) firefox 68.2.0-1.el7_7, thunderbird 68.2.0-1.el7_7 Red Hat Enterprise Linux Client Optional (v. 7) firefox 68.2.0-1.el7_7
    fixed: vendor fix RHSA-2019:3193
  • Red Hat Enterprise Linux Desktop (v. 6) firefox 68.2.0-4.el6_10, thunderbird 68.2.0-2.el6_10 Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 68.2.0-4.el6_10 Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 68.2.0-4.el6_10 Red Hat Enterprise Linux Server (v. 6) firefox 68.2.0-4.el6_10
    fixed: vendor fix RHSA-2019:3281
  • Red Hat Enterprise Linux Server (v. 7) firefox 68.2.0-1.el7_7
    fixed: vendor fix RHSA-2019:3193
  • Red Hat Enterprise Linux Server Optional (v. 6) firefox 68.2.0-4.el6_10, thunderbird 68.2.0-2.el6_10
    fixed: vendor fix RHSA-2019:3281
  • Red Hat Enterprise Linux Server Optional (v. 7) firefox 68.2.0-1.el7_7, thunderbird 68.2.0-1.el7_7
    fixed: vendor fix RHSA-2019:3193
  • Red Hat Enterprise Linux Workstation (v. 6) firefox 68.2.0-4.el6_10, thunderbird 68.2.0-2.el6_10
    fixed: vendor fix RHSA-2019:3281
show 3 more
  • Red Hat Enterprise Linux Workstation (v. 7) firefox 68.2.0-1.el7_7, thunderbird 68.2.0-1.el7_7
    fixed: vendor fix RHSA-2019:3193
  • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 68.2.0-4.el6_10
    fixed: vendor fix RHSA-2019:3281
  • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 68.2.0-1.el7_7
    fixed: vendor fix RHSA-2019:3193

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

1.33% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=1536227 referenced PoC, tagged "exploit" by a source, unverified

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 Firefox
  • Mozilla Thunderbird
  • Mozilla Firefox ESR

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.