Description
A use-after-free vulnerability can occur in the Fetch API when the worker or the associated window are freed when still in use, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.
References (12)
Core 12
Core References
Issue Tracking, Patch, Vendor Advisory x_refsource_confirm
https://bugzilla.mozilla.org/show_bug.cgi?id=1371889
Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2017/11/msg00000.html
Vendor Advisory x_refsource_confirm
https://www.mozilla.org/security/advisories/mfsa2017-22/
Third Party Advisory, VDB Entry vdb-entry
x_refsource_sectrack
http://www.securitytracker.com/id/1039465
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2017:2831
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2017:2885
Vendor Advisory x_refsource_confirm
https://www.mozilla.org/security/advisories/mfsa2017-21/
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/101055
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2017/dsa-4014
Vendor Advisory x_refsource_confirm
https://www.mozilla.org/security/advisories/mfsa2017-23/
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2017/dsa-3987
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/201803-14
Scores
CVSS v3
9.8
EPSS
0.0244
EPSS Percentile
85.4%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-416
Status
published
Products (22)
debian/debian_linux
7.0
debian/debian_linux
8.0
debian/debian_linux
9.0
mozilla/firefox
< 56.0
mozilla/thunderbird
< 52.4.0
redhat/enterprise_linux
5.0
redhat/enterprise_linux
6.0
redhat/enterprise_linux
7.0
redhat/enterprise_linux_desktop
5.0
redhat/enterprise_linux_desktop
6.0
... and 12 more
Published
Jun 11, 2018
Tracked Since
Feb 18, 2026