Memory corruption in Mozilla Thunderbird
Priority MEDIUM 47CWE-119Published · 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
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
Memory safety bugs present in Firefox 60 and Firefox ESR 60. 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 Thunderbird < 60, Firefox ESR < 60.1, and Firefox < 61.
Why it matters now
EPSS 0.0298 87th percentileScored 2026-11-07
Fix Fixed Thunderbird (Mozilla): 60Firefox ESR (Mozilla): 60.1+1 more product
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 60 | 60 | Patch available | CNA |
| Mozilla | Firefox ESR | before 60.1 | 60.1 | Patch available | CNA |
| Mozilla | Firefox | before 61 | 61 | Patch available | CNA |
- Thunderbird VendorMozilla Affected before 60 Fixed in 60 Patch available CNA
- Firefox ESR VendorMozilla Affected before 60.1 Fixed in 60.1 Patch available CNA
- Firefox VendorMozilla Affected before 61 Fixed in 61 Patch available CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* | 17.10 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | before 60.1.0; before 61.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* | before 60.0 | Vulnerable | Mozilla |
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* Versions 17.10 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 60.1.0; before 61.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 60.0 Vulnerable ·Mozilla
Remediation
- Fix · CNA Thunderbird (Mozilla) Fixed in 60
- Fix · CNA Firefox ESR (Mozilla) Fixed in 60.1
- Fix · CNA Firefox (Mozilla) Fixed in 61
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-3705-1
16 records Highest priority Priority MEDIUM 12 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2018-03751 Memory corruption in Mozilla ThunderbirdPriority MEDIUM 49
- TI-2018-03720 Improper input validation in Mozilla ThunderbirdPriority MEDIUM 49
- TI-2018-08870 Incorrect authorization in Mozilla Firefox ESRPriority MEDIUM 47
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — DSA-4295
4 records Highest priority Priority MEDIUM 3 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2018-03720 Improper input validation in Mozilla ThunderbirdPriority MEDIUM 49
- TI-2018-08862 Integer overflow in Mozilla ThunderbirdPriority MEDIUM 43
- TI-2018-08868 Improper input validation in Mozilla ThunderbirdPriority LOW 24
Vendor assessments
Red Hat
Red Hat rating: Critical. Red Hat's page for this CVE →
Not affected: 2 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2018-5187
- 2026-10-03 Alias added: GHSA-3w2h-f87x-m6vp
References
Advisory 9
- GLSA-201810-01
- https://www.mozilla.org/security/advisories/mfsa2018-15/
- [debian-lts-announce] 20181112 [SECURITY] [DLA 1575-1] thunderbird security update
- GLSA-201811-13
- DSA-4295
- https://www.mozilla.org/security/advisories/mfsa2018-16/
- https://www.mozilla.org/security/advisories/mfsa2018-19/
- USN-3705-1
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1461324%2C1414829%2C1395246%2C1467938%2C1461619%2C1425930%2C1438556%2C1454285%2C1459568%2C1463884
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-2018-5187 · CVE Program
- CVE-2018-5187 · NVD
- FIRST EPSS
- GHSA-3w2h-f87x-m6vp · GitHub Advisory Database · CC BY 4.0
- CVE-2018-5187 · 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