CVE-2017-7801

high-risk
Published 2018-06-11

A use-after-free vulnerability can occur while re-computing layout for a "marquee" element during window resizing where the updated style object is freed while still in use. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.

Do I need to act?

~
2.3% 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 (17)

Affected Vendors

Debian Redhat Mozilla

References (22)

Third Party Advisory http://www.securityfocus.com/bid/100197
Third Party Advisory http://www.securitytracker.com/id/1039124
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:2456
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:2534
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1371259
Third Party Advisory https://security.gentoo.org/glsa/201803-14
Third Party Advisory https://www.debian.org/security/2017/dsa-3928
Third Party Advisory https://www.debian.org/security/2017/dsa-3968
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-18/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-19/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-20/
Third Party Advisory http://www.securityfocus.com/bid/100197
Third Party Advisory http://www.securitytracker.com/id/1039124
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:2456
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:2534
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1371259
Third Party Advisory https://security.gentoo.org/glsa/201803-14
Third Party Advisory https://www.debian.org/security/2017/dsa-3928
Third Party Advisory https://www.debian.org/security/2017/dsa-3968
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-18/
and 2 more references
56
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 5/34 · Minimal
Exposure 19/34 · Moderate