CVE-2018-12367
This vulnerability affects Thunderbird < 60, Firefox ESR < 60.1, and Firefox < 61.
Does this matter?
Lower severity and a low EPSS score (1.98%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.0
- 4.3 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
- EPSS
- 1.98% probability · 80th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- debian/debian linux · canonical/ubuntu linux · mozilla/firefox · mozilla/thunderbird
- Source
- security@mozilla.org
EPSS 2.0% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/104561Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041193Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1462891Issue Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00011.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201810-01Third Party Advisory
- https://security.gentoo.org/glsa/201811-13Third Party Advisory
- https://usn.ubuntu.com/3705-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4295Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-15/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-16/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-19/Vendor Advisory
- http://www.securityfocus.com/bid/104561Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041193Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1462891Issue Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00011.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201810-01Third Party Advisory
- https://security.gentoo.org/glsa/201811-13Third Party Advisory
- https://usn.ubuntu.com/3705-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4295Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-15/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-16/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-19/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.