CVE-2018-12367: canonical ubuntu_linux Improper Input Validation
Vulnerability summary
CVE-2018-12367 is a medium (CVSS 4.3) Improper Input Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 1.98% chance of exploitation in the next 30 days, higher than 80.6% of scored vulnerabilities.
Not severe (CVSS 4.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 9 · Related 6Timeline
- 18-10-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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 metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated4.3MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
- OSV · DebianEcosystem advisory · calculated4.3MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
EPSS trend
Probability
1.98%
Chance of exploitation in the next 30 days
Percentile
81%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.98% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Mozilla3 products
- firefox≥ unspecified, < 61 | < 60.1.0 | < 61.0
- firefox esr≥ unspecified, < 60.1
- thunderbird≥ unspecified, < 60 | < 60.0
Debian2 products
- thunderbird< 1:60.0-1
- debian_linuxEOL8.0 | 9.0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 17.10 | 18.04
Ubuntu1 product
- firefox< 61.0+build3-0ubuntu0.14.04.2 | < 61.0+build3-0ubuntu0.16.04.2 | < 61.0+build3-0ubuntu0.18.04.1
4 vendors · 7 products
References
16 links- bugzilla.mozilla.org/show_bug.cgi?id=1462891X Refsource CONFIRMIssue TrackingPermissions RequiredVendor Advisory
lists.debian.org/debian-lts-announce/2018/11/msg00011.htmlMailing ListX Refsource MLISTThird Party Advisory