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Vulnerability details: VCID-mn5y-duvw-bba6
Vulnerability ID VCID-mn5y-duvw-bba6
Aliases CVE-2018-12367
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-385 Covert Timing Channel
CWE-20 Improper Input Validation
System Score Found at
cvssv3 4.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-12367.json
epss 0.00737 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00737 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00737 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00737 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00737 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00737 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00737 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00737 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00737 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00737 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00737 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00737 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00737 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00752 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00752 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00752 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
epss 0.00752 https://api.first.org/data/v1/epss?cve=CVE-2018-12367
cvssv3 5.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2018-12367
cvssv3 4.3 https://nvd.nist.gov/vuln/detail/CVE-2018-12367
archlinux Critical https://security.archlinux.org/AVG-727
archlinux Critical https://security.archlinux.org/AVG-751
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2018-15
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2018-16
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2018-19
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-12367.json
https://api.first.org/data/v1/epss?cve=CVE-2018-12367
https://bugzilla.mozilla.org/show_bug.cgi?id=1462891
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12361
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12367
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12371
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5156
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5187
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.debian.org/debian-lts-announce/2018/11/msg00011.html
https://security.gentoo.org/glsa/201810-01
https://security.gentoo.org/glsa/201811-13
https://www.debian.org/security/2018/dsa-4295
https://www.mozilla.org/security/advisories/mfsa2018-15/
https://www.mozilla.org/security/advisories/mfsa2018-16/
https://www.mozilla.org/security/advisories/mfsa2018-19/
http://www.securityfocus.com/bid/104561
http://www.securitytracker.com/id/1041193
1595032 https://bugzilla.redhat.com/show_bug.cgi?id=1595032
ASA-201806-14 https://security.archlinux.org/ASA-201806-14
ASA-201808-8 https://security.archlinux.org/ASA-201808-8
AVG-727 https://security.archlinux.org/AVG-727
AVG-751 https://security.archlinux.org/AVG-751
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
CVE-2018-12367 https://nvd.nist.gov/vuln/detail/CVE-2018-12367
mfsa2018-15 https://www.mozilla.org/en-US/security/advisories/mfsa2018-15
mfsa2018-16 https://www.mozilla.org/en-US/security/advisories/mfsa2018-16
mfsa2018-19 https://www.mozilla.org/en-US/security/advisories/mfsa2018-19
USN-3705-1 https://usn.ubuntu.com/3705-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-12367.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-12367
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-12367
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.72012
EPSS Score 0.00737
Published At Aug. 3, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:51.944019+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2018/mfsa2018-19.yml 37.0.0