CVE-2018-5163
Publication date 11 May 2018
Last updated 25 August 2025
Ubuntu priority
Description
If a malicious attacker has used another vulnerability to gain full control over a content process, they may be able to replace the alternate data resources stored in the JavaScript Start-up Bytecode Cache (JSBC) for other JavaScript code. If the parent process then runs this replaced code, the executed script would be run with the parent process' privileges, escaping the sandbox on content processes. This vulnerability affects Firefox < 60.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| firefox | 18.04 LTS bionic |
Fixed 60.0+build2-0ubuntu1
|
| 16.04 LTS xenial |
Fixed 60.0+build2-0ubuntu0.16.04.1
|
|
| 14.04 LTS trusty |
Fixed 60.0+build2-0ubuntu0.14.04.1
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
8.1 · High
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
References
Related Ubuntu Security Notices (USN)
- USN-3645-1
- Firefox vulnerabilities
- 11 May 2018