CVE-2017-7751

CRITICAL 9.8CVE-2017-7751 · Published 11/06/2018 · updated 17/06/2026

In short

CVE-2017-7751 is a CRITICAL (CVSS 9.8) vulnerability affecting firefox (mozilla), thunderbird (mozilla).
Chance of exploitation in the next 30 days (EPSS): 2.8%, higher than 86.4% of all vulnerabilities.
Fix: update to 52.2.0, 54.0 or later.

Package	Affected versions	Patched versions
firefox mozilla	`< 52.2.0< 54.0`	`52.2.054.0`
thunderbird mozilla	`< 52.2.0`	`52.2.0`

Description

A use-after-free vulnerability with content viewer listeners that results in a potentially exploitable crash. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.

References

securityfocus.com/bid/99057 · Third Party Advisory
securitytracker.com/id/1038689 · Third Party Advisory
access.redhat.com/errata/RHSA-2017:1440 · Third Party Advisory
access.redhat.com/errata/RHSA-2017:1561 · Third Party Advisory
bugzilla.mozilla.org/show_bug.cgi · Exploit
debian.org/security/2017/dsa-3881 · Third Party Advisory
debian.org/security/2017/dsa-3918 · Third Party Advisory
mozilla.org/security/advisories/mfsa2017-15 · Vendor Advisory
mozilla.org/security/advisories/mfsa2017-16 · Vendor Advisory
mozilla.org/security/advisories/mfsa2017-17 · Vendor Advisory

More vulnerabilities in firefox

See all →

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Scan my site free

Package

Affected versions

Patched versions

firefox

mozilla

< 52.2.0< 54.0

52.2.054.0

thunderbird

mozilla

< 52.2.0

52.2.0

More vulnerabilities in firefox

See all →