Injection in Mozilla Firefox ESR
Priority MEDIUM 41CWE-74Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 16 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
As part of a winning Pwn2Own entry, a researcher demonstrated a sandbox escape by installing a malicious language pack and then opening a browser feature that used the compromised translation. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.
Why it matters now
EPSS 0.02574 85th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Partial Firefox ESR (Mozilla): 60.8Firefox (Mozilla): 68+1 more productRed Hat: 6 advisoriesRed Hat: 16 fixed, 1 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Mozilla | Firefox ESR | before 60.8 | 60.8 | Patch available | CNA |
| Mozilla | Firefox | before 68 | 68 | Patch available | CNA |
| Mozilla | Thunderbird | before 60.8 | 60.8 | Patch available | CNA |
- Firefox ESR VendorMozilla Affected before 60.8 Fixed in 60.8 Patch available CNA
- Firefox VendorMozilla Affected before 68 Fixed in 68 Patch available CNA
- Thunderbird VendorMozilla Affected before 60.8 Fixed in 60.8 Patch available CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | before 68.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* | before 60.8 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* | before 60.8 | Vulnerable | Mozilla |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:a:novell:suse_package_hub_for_suse_linux_enterprise:12:*:*:*:*:*:*:* | 12 | Vulnerable | Novell |
| cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* | 15.0 | Vulnerable | openSUSE |
| cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* | 15.1 | Vulnerable | openSUSE |
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 68.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 60.8 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 60.8 Vulnerable ·Mozilla
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:a:novell:suse_package_hub_for_suse_linux_enterprise:12:*:*:*:*:*:*:* Versions 12 Vulnerable ·Novell
- cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·openSUSE
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
Remediation
- Fix · CNA Firefox ESR (Mozilla) Fixed in 60.8
- Fix · CNA Firefox (Mozilla) Fixed in 68
- Fix · CNA Thunderbird (Mozilla) Fixed in 60.8
Red Hat 6 advisories
- RHSA-2019:1799 Released 2019-07-16 · Red Hat rating Importantthunderbird security and bug fix update
- Red Hat Enterprise Linux AppStream (v. 8) thunderbird-60.8.0-1.el8_0
- RHSA-2019:1777 Released 2019-07-15 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux Desktop (v. 6) thunderbird-60.8.0-1.el6_10
- Red Hat Enterprise Linux Server Optional (v. 6) thunderbird-60.8.0-1.el6_10
- Red Hat Enterprise Linux Workstation (v. 6) thunderbird-60.8.0-1.el6_10
- RHSA-2019:1775 Released 2019-07-15 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux Client (v. 7) thunderbird-60.8.0-1.el7_6
- Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-60.8.0-1.el7_6
- Red Hat Enterprise Linux Workstation (v. 7) thunderbird-60.8.0-1.el7_6
- Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) thunderbird-60.8.0-1.el7_6
Show 3 more Red Hat advisories
- RHSA-2019:1763 Released 2019-07-11 · Red Hat rating Criticalfirefox security update
- Red Hat Enterprise Linux Client (v. 7) firefox-60.8.0-1.el7_6
- Red Hat Enterprise Linux Client Optional (v. 7) firefox-60.8.0-1.el7_6
- Red Hat Enterprise Linux Server (v. 7) firefox-60.8.0-1.el7_6
- Red Hat Enterprise Linux Server Optional (v. 7) firefox-60.8.0-1.el7_6
- Red Hat Enterprise Linux Workstation (v. 7) firefox-60.8.0-1.el7_6
- Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-60.8.0-1.el7_6
- Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) firefox-60.8.0-1.el7_6
- RHSA-2019:1765 Released 2019-07-11 · Red Hat rating Criticalfirefox security update
- Red Hat Enterprise Linux Desktop (v. 6) firefox-60.8.0-1.el6_10
- Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-60.8.0-1.el6_10
- Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-60.8.0-1.el6_10
- Red Hat Enterprise Linux Server (v. 6) firefox-60.8.0-1.el6_10
- Red Hat Enterprise Linux Server Optional (v. 6) firefox-60.8.0-1.el6_10
- Red Hat Enterprise Linux Workstation (v. 6) firefox-60.8.0-1.el6_10
- Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-60.8.0-1.el6_10
- RHSA-2019:1764 Released 2019-07-11 · Red Hat rating Criticalfirefox security update
- Red Hat Enterprise Linux AppStream (v. 8) firefox-60.8.0-1.el8_0
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — GLSA-201908-12
23 records Highest priority Priority CRITICAL 2 CRITICAL, 8 MEDIUM, 13 LOW
Other records, highest priority first
- TI-2019-08769 Improper input validation in Mozilla Firefox ESRPriority CRITICAL 100
- TI-2019-08768 Type confusion in Mozilla Firefox ESRPriority CRITICAL 97
- TI-2019-08789 A vulnerability exists where if a user opens a locally saved HTML file, this file can use…Priority MEDIUM 48
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — GLSA-201908-20
14 records Highest priority Priority MEDIUM 10 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2019-08765 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 55
- TI-2019-08764 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 55
- TI-2019-08766 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 54
Show 3 more groups
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — openSUSE-SU-2019:1811
10 records Highest priority Priority MEDIUM 6 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2019-08789 A vulnerability exists where if a user opens a locally saved HTML file, this file can use…Priority MEDIUM 48
- TI-2019-08770 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 47
- TI-2019-08774 Use after free in Mozilla Firefox ESRPriority MEDIUM 46
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — openSUSE-SU-2019:1813
10 records Highest priority Priority MEDIUM 6 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2019-08789 A vulnerability exists where if a user opens a locally saved HTML file, this file can use…Priority MEDIUM 48
- TI-2019-08770 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 47
- TI-2019-08774 Use after free in Mozilla Firefox ESRPriority MEDIUM 46
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — openSUSE-SU-2019:1990
10 records Highest priority Priority MEDIUM 6 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2019-08789 A vulnerability exists where if a user opens a locally saved HTML file, this file can use…Priority MEDIUM 48
- TI-2019-08770 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 47
- TI-2019-08774 Use after free in Mozilla Firefox ESRPriority MEDIUM 46
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2019:1764, RHSA-2019:1799 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2019:1763, RHSA-2019:1775 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2019:1763 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2019:1765, RHSA-2019:1777 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2019:1765 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2019:1765 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2019:1765 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2019:1763 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2019:1765, RHSA-2019:1777 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2019:1763, RHSA-2019:1775 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2019:1765, RHSA-2019:1777 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2019:1763, RHSA-2019:1775 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2019:1765 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2019:1763 |
| Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) | Fixed | RHSA-2019:1763 |
| Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) | Fixed | RHSA-2019:1775 |
Timeline
- 2026-10-02 Threatist record created from CVE-2019-9811
- 2026-10-03 Alias added: GHSA-63j5-535g-4392
References
Exploit 2
Advisory 12
- https://www.mozilla.org/security/advisories/mfsa2019-21/
- https://www.mozilla.org/security/advisories/mfsa2019-22/
- https://www.mozilla.org/security/advisories/mfsa2019-23/
- openSUSE-SU-2019:1811
- openSUSE-SU-2019:1813
- [debian-lts-announce] 20190802 [SECURITY] [DLA 1869-1] firefox-esr security update
- [debian-lts-announce] 20190802 [SECURITY] [DLA 1870-1] thunderbird security update
- GLSA-201908-12
- GLSA-201908-20
- openSUSE-SU-2019:1990
- openSUSE-SU-2019:2251
- openSUSE-SU-2019:2260
More Mozilla Firefox vulnerabilities
- TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
- TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
- TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
- TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
- TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
- TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2019-9811 · CVE Program
- CVE-2019-9811 · NVD
- FIRST EPSS
- GHSA-63j5-535g-4392 · GitHub Advisory Database · CC BY 4.0
- CVE-2019-9811 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences