CVE-2017-5442

CRITICAL 9.8CVE-2017-5442 · Published 11/06/2018 · updated 17/06/2026

In short

CVE-2017-5442 is a CRITICAL (CVSS 9.8) vulnerability affecting firefox (mozilla), thunderbird (mozilla).
Chance of exploitation in the next 30 days (EPSS): 2.6%, higher than 85.3% of all vulnerabilities.
Fix: update to 45.9.0, 53.0, 52.1.0 or later.

Package	Affected versions	Patched versions
firefox mozilla	`= 52.0< 45.9.0< 53.0`	`45.9.053.0`
thunderbird mozilla	`< 52.1.0`	`52.1.0`

Description

A use-after-free vulnerability during changes in style when manipulating DOM elements. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

References

securityfocus.com/bid/97940 · Third Party Advisory
securitytracker.com/id/1038320 · Third Party Advisory
access.redhat.com/errata/RHSA-2017:1104 · Third Party Advisory
access.redhat.com/errata/RHSA-2017:1106 · Third Party Advisory
access.redhat.com/errata/RHSA-2017:1201 · Third Party Advisory
bugzilla.mozilla.org/show_bug.cgi · Issue Tracking
debian.org/security/2017/dsa-3831 · Third Party Advisory
mozilla.org/security/advisories/mfsa2017-10 · Vendor Advisory
mozilla.org/security/advisories/mfsa2017-11 · Vendor Advisory
mozilla.org/security/advisories/mfsa2017-12 · Vendor Advisory
mozilla.org/security/advisories/mfsa2017-13 · Vendor Advisory

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Package

Affected versions

Patched versions

firefox

mozilla

= 52.0< 45.9.0< 53.0

45.9.053.0

thunderbird

mozilla

< 52.1.0

52.1.0

More vulnerabilities in firefox

See all →