CVE-2019-11711

moderate-risk
Published 2019-07-23

When an inner window is reused, it does not consider the use of document.domain for cross-origin protections. If pages on different subdomains ever cooperatively use document.domain, then either page can abuse this to inject script into arbitrary pages on the other subdomain, even those that did not use document.domain to relax their origin security. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.

Do I need to act?

~
1.5% 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
8
CVSS 8.8/10 High
NETWORK / LOW complexity

Affected Products (3)

Affected Vendors

Debian Mozilla

References (26)

Broken Link http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.html
Broken Link http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.html
Broken Link http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.html
Broken Link http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html
Broken Link http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1552541
Mailing List https://lists.debian.org/debian-lts-announce/2019/08/msg00001.html
Mailing List https://lists.debian.org/debian-lts-announce/2019/08/msg00002.html
Third Party Advisory https://security.gentoo.org/glsa/201908-12
Third Party Advisory https://security.gentoo.org/glsa/201908-20
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2019-21/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2019-22/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2019-23/
Broken Link http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.html
Broken Link http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.html
Broken Link http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.html
Broken Link http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html
Broken Link http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1552541
Mailing List https://lists.debian.org/debian-lts-announce/2019/08/msg00001.html
and 6 more references
43
/ 100
moderate-risk
Severity 30/34 · Critical
Exploitability 4/34 · Minimal
Exposure 9/34 · Low