CVE-2017-5434: debian debian_linux Use After Free
CVSS: 9.8v3.0CriticalModified
AliasesUBUNTU-CVE-2017-5434DEBIAN-CVE-2017-5434
Published 11-06-2018Last modified 05-08-2024
Vulnerability summary
CVE-2017-5434 is a critical (CVSS 9.8) Use After Free vulnerability in debian debian_linux. EPSS estimates a 3.50% chance of exploitation in the next 30 days, higher than 89% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.0 (NVD)EPSS score
3.50%
0%100%
Low · -0.07 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 18 · Related 10Timeline
- 11-06-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
A use-after-free vulnerability occurs when redirecting focus handling which results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.
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
3.50%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
-0.07 pp
From 3.57% on 18-09-2026
18-09-202618-10-2026
EPSS score3.50%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (bugzilla.mozilla.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Mozilla3 products
- firefox≥ unspecified, < 53 | < 45.9.0 | < 53.0 | 52.0
- firefox_esr≥ unspecified, < 45.9 | ≥ unspecified, < 52.1
- thunderbird≥ unspecified, < 52.1 | < 52.1.0
Redhat3 products
- enterprise_linux_desktop6.0 | 7.0
- enterprise_linux_server6.0 | 7.0
- enterprise_linux_workstation6.0 | 7.0
Debian2 products
- firefox-esr< 45.9.0esr-1
- debian_linuxEOL8.0
Ubuntu2 products
- firefox< 53.0+build6-0ubuntu0.14.04.1 | < 53.0+build6-0ubuntu0.16.04.1
- thunderbird< 1:52.1.1+build1-0ubuntu0.14.04.1 | < 1:52.1.1+build1-0ubuntu0.16.04.1
4 vendors · 10 products
