CVE-2018-5091: canonical ubuntu_linux Use After Free
CVSS: 9.8v3.0CriticalModified
AliasesUBUNTU-CVE-2018-5091DEBIAN-CVE-2018-5091
Published 11-06-2018Last modified 05-08-2024
Vulnerability summary
CVE-2018-5091 is a critical (CVSS 9.8) Use After Free vulnerability in canonical ubuntu_linux. EPSS estimates a 3.28% chance of exploitation in the next 30 days, higher than 88.2% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.0 (NVD)EPSS score
3.28%
0%100%
Low · -0.07 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 11 · Related 5Timeline
- 11-06-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
A use-after-free vulnerability can occur during WebRTC connections when interacting with the DTMF timers. This results in a potentially exploitable crash. This vulnerability affects Firefox ESR < 52.6 and Firefox < 58.
CVSS metrics
4 scores · 3 sources · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
3.28%
Chance of exploitation in the next 30 days
Percentile
88%
Versus all other CVEs
30-day change
-0.07 pp
From 3.35% on 18-09-2026
18-09-202618-10-2026
EPSS score3.28%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Redhat6 products
- enterprise_linuxEOL6.0 | 7.0
- enterprise_linux_desktop6.0 | 7.0
- enterprise_linux_server6.0 | 7.0
- enterprise_linux_server_aus7.3 | 7.4
- enterprise_linux_server_eus7.3 | 7.4 | 7.5
Debian2 products
- firefox-esr< 52.6.0esr-1
- debian_linuxEOL7.0 | 8.0 | 9.0
Mozilla2 products
- firefox≥ unspecified, < 58 | < 58.0 | < 52.6.0
- firefox_esr≥ unspecified, < 52.6
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 17.10
Ubuntu1 product
- firefox< 58.0+build6-0ubuntu0.14.04.1 | < 58.0+build6-0ubuntu0.16.04.1 | < 59.0.1+build1-0ubuntu1
5 vendors · 12 products
References
15 links
- bugzilla.mozilla.org/show_bug.cgi?id=1423086X Refsource CONFIRMIssue TrackingPermissions RequiredVendor Advisory
- lists.debian.org/debian-lts-announce/2018/01/msg00030.htmlMailing ListX Refsource MLISTThird Party Advisory