CVE-2017-5402

high-risk
Published 2018-06-11

A use-after-free can occur when events are fired for a "FontFace" object after the object has been already been destroyed while working with fonts. This results in a potentially exploitable crash. This vulnerability affects Firefox < 52, Firefox ESR < 45.8, Thunderbird < 52, and Thunderbird < 45.8.

Do I need to act?

~
2.5% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (20)

Affected Vendors

Debian Redhat Mozilla

References (28)

Third Party Advisory http://rhn.redhat.com/errata/RHSA-2017-0459.html
Third Party Advisory http://rhn.redhat.com/errata/RHSA-2017-0461.html
Third Party Advisory http://rhn.redhat.com/errata/RHSA-2017-0498.html
Third Party Advisory http://www.securityfocus.com/bid/96664
Third Party Advisory http://www.securitytracker.com/id/1037966
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1334876
Third Party Advisory https://security.gentoo.org/glsa/201705-06
Third Party Advisory https://security.gentoo.org/glsa/201705-07
Third Party Advisory https://www.debian.org/security/2017/dsa-3805
Third Party Advisory https://www.debian.org/security/2017/dsa-3832
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-05/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-06/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-07/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-09/
Third Party Advisory http://rhn.redhat.com/errata/RHSA-2017-0459.html
Third Party Advisory http://rhn.redhat.com/errata/RHSA-2017-0461.html
Third Party Advisory http://rhn.redhat.com/errata/RHSA-2017-0498.html
Third Party Advisory http://www.securityfocus.com/bid/96664
Third Party Advisory http://www.securitytracker.com/id/1037966
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1334876
and 8 more references
58
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 6/34 · Minimal
Exposure 20/34 · Moderate