Use after free in Mozilla Thunderbird
Priority MEDIUM 42CWE-416Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 15 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
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.
Why it matters now
EPSS 0.01877 79th percentileScored 2026-11-07
Fix Partial Thunderbird (Mozilla): 68.3Firefox ESR (Mozilla): 68.3+1 more productRed Hat: 8 advisoriesRed Hat: 15 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 | Thunderbird | before 68.3 | 68.3 | Patch available | CNA |
| Mozilla | Firefox ESR | before 68.3 | 68.3 | Patch available | CNA |
| Mozilla | Firefox | before 71 | 71 | Patch available | CNA |
- Thunderbird VendorMozilla Affected before 68.3 Fixed in 68.3 Patch available CNA
- Firefox ESR VendorMozilla Affected before 68.3 Fixed in 68.3 Patch available CNA
- Firefox VendorMozilla Affected before 71 Fixed in 71 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | before 71.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* | before 68.3 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* | before 68.3 | Vulnerable | Mozilla |
| cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* | 15.1 | Vulnerable | openSUSE |
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 71.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 68.3 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 68.3 Vulnerable ·Mozilla
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
Remediation
- Fix · CNA Thunderbird (Mozilla) Fixed in 68.3
- Fix · CNA Firefox ESR (Mozilla) Fixed in 68.3
- Fix · CNA Firefox (Mozilla) Fixed in 71
Red Hat 8 advisories
- RHSA-2020:0295 Released 2020-01-30 · Red Hat rating Criticalfirefox security update
- Red Hat Enterprise Linux AppStream E4S (v. 8.0) firefox-68.4.1-1.el8_0
- RHSA-2020:0292 Released 2020-01-30 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream E4S (v. 8.0) thunderbird-68.4.1-2.el8_0
- RHSA-2019:4205 Released 2019-12-11 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux Desktop (v. 6) thunderbird-68.3.0-3.el6_10
- Red Hat Enterprise Linux Server Optional (v. 6) thunderbird-68.3.0-3.el6_10
- Red Hat Enterprise Linux Workstation (v. 6) thunderbird-68.3.0-3.el6_10
Show 5 more Red Hat advisories
- RHSA-2019:4195 Released 2019-12-10 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream (v. 8) thunderbird-68.3.0-2.el8_1
- RHSA-2019:4148 Released 2019-12-10 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux Client (v. 7) thunderbird-68.3.0-1.el7_7
- Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-68.3.0-1.el7_7
- Red Hat Enterprise Linux Workstation (v. 7) thunderbird-68.3.0-1.el7_7
- RHSA-2019:4111 Released 2019-12-05 · Red Hat rating Criticalfirefox security update
- Red Hat Enterprise Linux AppStream (v. 8) firefox-68.3.0-1.el8_1
- RHSA-2019:4107 Released 2019-12-05 · Red Hat rating Criticalfirefox security update
- Red Hat Enterprise Linux Client (v. 7) firefox-68.3.0-1.el7_7
- Red Hat Enterprise Linux Client Optional (v. 7) firefox-68.3.0-1.el7_7
- Red Hat Enterprise Linux Server (v. 7) firefox-68.3.0-1.el7_7
- Red Hat Enterprise Linux Server Optional (v. 7) firefox-68.3.0-1.el7_7
- Red Hat Enterprise Linux Workstation (v. 7) firefox-68.3.0-1.el7_7
- Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-68.3.0-1.el7_7
- RHSA-2019:4108 Released 2019-12-05 · Red Hat rating Criticalfirefox security update
- Red Hat Enterprise Linux Desktop (v. 6) firefox-68.3.0-1.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
- Red Hat Enterprise Linux Server Optional (v. 6) firefox-68.3.0-1.el6_10
- Red Hat Enterprise Linux Workstation (v. 6) firefox-68.3.0-1.el6_10
- Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-68.3.0-1.el6_10
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 — USN-4241-1
10 records Highest priority Priority MEDIUM 6 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2019-08802 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 44
- TI-2019-12707 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — RHSA-2020:0292
9 records Highest priority Priority MEDIUM 5 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2019-12707 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2019-12695 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 42
Show 3 more groups
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — RHSA-2020:0295
9 records Highest priority Priority MEDIUM 5 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2019-12707 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2019-12695 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 42
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — openSUSE-SU-2020:0003
7 records Highest priority Priority MEDIUM 4 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2019-08802 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 44
- TI-2019-12695 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 42
- TI-2019-12688 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 42
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — openSUSE-SU-2020:0002
7 records Highest priority Priority MEDIUM 4 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2019-08802 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 44
- TI-2019-12695 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 42
- TI-2019-12688 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 42
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-2019:4111, RHSA-2019:4195 |
| Red Hat Enterprise Linux AppStream E4S (v. 8.0) | Fixed | RHSA-2020:0292, RHSA-2020:0295 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2019:4107, RHSA-2019:4148 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2019:4107 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2019:4108, RHSA-2019:4205 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2019:4108 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2019:4108 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2019:4108 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2019:4107 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2019:4108, RHSA-2019:4205 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2019:4107, RHSA-2019:4148 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2019:4108, RHSA-2019:4205 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2019:4107, RHSA-2019:4148 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2019:4108 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2019:4107 |
Timeline
- 2026-10-02 Threatist record created from CVE-2019-17008
- 2026-10-03 Alias added: GHSA-vm87-9hjc-x68w
References
Advisory 11
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-2019-17008 · CVE Program
- CVE-2019-17008 · NVD
- FIRST EPSS
- GHSA-vm87-9hjc-x68w · GitHub Advisory Database · CC BY 4.0
- CVE-2019-17008 · Red Hat security data · CC BY 4.0
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