Out-of-bounds write in Mozilla Firefox ESR
Priority MEDIUM 47CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- 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. Impact type from CWE-787 and the CVSS impact.
Summary
Mozilla developers and community members reported memory safety bugs present in Firefox 67 and Firefox ESR 60.7. 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 Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.
Why it matters now
EPSS 0.02349 83rd percentileScored 2026-11-07
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 60.8.0; before 68.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* | before 60.8.0 | Vulnerable | Mozilla |
| 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:suse:package_hub:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | SUSE |
| cpe:2.3:o:suse:linux_enterprise:12.0:*:*:*:*:*:*:* | 12.0 | Running on | SUSE |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 60.8.0; before 68.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 60.8.0 Vulnerable ·Mozilla
- 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
- cpe:2.3:a:suse:package_hub:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·SUSE
- cpe:2.3:o:suse:linux_enterprise:12.0:*:*:*:*:*:*:* Versions 12.0 Running on ·SUSE
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
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-2019-08774 Use after free in Mozilla Firefox ESRPriority MEDIUM 46
- TI-2019-08772 When an inner window is reused, it does not consider the use of document.domain for…Priority MEDIUM 41
- 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-2019-08774 Use after free in Mozilla Firefox ESRPriority MEDIUM 46
- TI-2019-08772 When an inner window is reused, it does not consider the use of document.domain for…Priority MEDIUM 41
- 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-2019-08774 Use after free in Mozilla Firefox ESRPriority MEDIUM 46
- TI-2019-08772 When an inner window is reused, it does not consider the use of document.domain for…Priority MEDIUM 41
Vendor assessments
Red Hat
Red Hat rating: Critical. 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-2019-11709
- 2026-10-03 Alias added: GHSA-xhg3-p7wr-4hrx
References
Advisory 13
- https://www.mozilla.org/security/advisories/mfsa2019-21/
- https://www.mozilla.org/security/advisories/mfsa2019-22/
- https://www.mozilla.org/security/advisories/mfsa2019-23/
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1547266%2C1540759%2C1548822%2C1550498%2C1515052%2C1539219%2C1547757%2C1550498%2C1533522
- 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-2019:2248
- openSUSE-SU-2019:2249
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-2019-11709 · CVE Program
- CVE-2019-11709 · NVD
- FIRST EPSS
- GHSA-xhg3-p7wr-4hrx · GitHub Advisory Database · CC BY 4.0
- CVE-2019-11709 · 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