# CVE-2018-12367: firefox: In the previous mitigations for Spectre, the resolution or precision of various methods was reduced to counteract the...

CVE-2018-12367 is fixed in 4 products on 1 platform, first by firefox 61.0+build3-0ubuntu0.18.04.1, released June 26, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-12367
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0199
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 26, 2018

## Description

In the previous mitigations for Spectre, the resolution or precision of various methods was reduced to counteract the ability to measure precise time intervals. In that work PerformanceNavigationTiming was not adjusted but it was found that it could be used as a precision timer. This vulnerability affects Thunderbird < 60, Firefox ESR < 60.1, and Firefox < 61.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 61.0+build3-0ubuntu0.18.04.1 | [firefox 61.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-61.0-build3-0ubuntu0.18.04.1.md) | Jun 26, 2018 |
| Linux | firefox-globalmenu Ubuntu 18.04.6 LTS (bionic) | 61.0+build3-0ubuntu0.18.04.1 | [firefox-globalmenu 61.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-globalmenu-61.0-build3-0ubuntu0.18.04.1.md) | Jun 26, 2018 |
| Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 61.0+build3-0ubuntu0.18.04.1 | [firefox-mozsymbols 61.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-61.0-build3-0ubuntu0.18.04.1.md) | Jun 26, 2018 |
| Linux | firefox-testsuite Ubuntu 18.04.6 LTS (bionic) | 61.0+build3-0ubuntu0.18.04.1 | [firefox-testsuite 61.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-testsuite-61.0-build3-0ubuntu0.18.04.1.md) | Jun 26, 2018 |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo