CVE-2018-18493
Publication date 11 December 2018
Last updated 25 August 2025
Ubuntu priority
Description
A buffer overflow can occur in the Skia library during buffer offset calculations with hardware accelerated canvas 2D actions due to the use of 32-bit calculations instead of 64-bit. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.4, Firefox ESR < 60.4, and Firefox < 64.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| firefox | ||
| 18.04 LTS bionic |
Fixed 64.0+build3-0ubuntu0.18.04.1
|
|
| 16.04 LTS xenial |
Fixed 64.0+build3-0ubuntu0.16.04.1
|
|
| 14.04 LTS trusty |
Fixed 64.0+build3-0ubuntu0.14.04.1
|
|
| thunderbird | ||
| 18.04 LTS bionic |
Fixed 1:60.4.0+build2-0ubuntu0.18.04.1
|
|
| 16.04 LTS xenial |
Fixed 1:60.4.0+build2-0ubuntu0.16.04.1
|
|
| 14.04 LTS trusty |
Fixed 1:60.4.0+build2-0ubuntu0.14.04.1
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
9.8 · Critical
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-3868-1
- Thunderbird vulnerabilities
- 24 January 2019
- USN-3844-1
- Firefox vulnerabilities
- 11 December 2018