CVE-2017-7818

CRITICAL 9.8CVE-2017-7818 · Published 11/06/2018 · updated 17/06/2026

In short

CVE-2017-7818 is a CRITICAL (CVSS 9.8) vulnerability affecting firefox (mozilla), thunderbird (mozilla).
Chance of exploitation in the next 30 days (EPSS): 3.3%, higher than 88.6% of all vulnerabilities.
Fix: update to 52.4.0, 56.0 or later.

Package	Affected versions	Patched versions
firefox mozilla	`< 52.4.0< 56.0`	`52.4.056.0`
thunderbird mozilla	`< 52.4.0`	`52.4.0`

Description

A use-after-free vulnerability can occur when manipulating arrays of Accessible Rich Internet Applications (ARIA) elements within containers through the DOM. This results in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

References

securityfocus.com/bid/101055 · Third Party Advisory
securitytracker.com/id/1039465 · Third Party Advisory
access.redhat.com/errata/RHSA-2017:2831 · Third Party Advisory
access.redhat.com/errata/RHSA-2017:2885 · Third Party Advisory
bugzilla.mozilla.org/show_bug.cgi · Exploit
lists.debian.org/debian-lts-announce/2017/11/msg00000.html · Mailing List
security.gentoo.org/glsa/201803-14 · Third Party Advisory
debian.org/security/2017/dsa-3987 · Third Party Advisory
debian.org/security/2017/dsa-4014 · Third Party Advisory
mozilla.org/security/advisories/mfsa2017-21 · Vendor Advisory
mozilla.org/security/advisories/mfsa2017-22 · Vendor Advisory
mozilla.org/security/advisories/mfsa2017-23 · Vendor Advisory

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Package

Affected versions

Patched versions

firefox

mozilla

< 52.4.0< 56.0

52.4.056.0

thunderbird

mozilla

< 52.4.0

52.4.0

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