CVE-2017-7823

moderate-risk
Published 2018-06-11

The content security policy (CSP) "sandbox" directive did not create a unique origin for the document, causing it to behave as if the "allow-same-origin" keyword were always specified. This could allow a Cross-Site Scripting (XSS) attack to be launched from unsafe content. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

Do I need to act?

~
1.4% 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
5
CVSS 5.4/10 Medium
NETWORK / LOW complexity

Affected Products (14)

Affected Vendors

Debian Redhat Mozilla

References (24)

Third Party Advisory http://www.securityfocus.com/bid/101059
Third Party Advisory http://www.securitytracker.com/id/1039465
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:2831
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:2885
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1396320
Mailing List https://lists.debian.org/debian-lts-announce/2017/11/msg00000.html
Third Party Advisory https://security.gentoo.org/glsa/201803-14
Third Party Advisory https://www.debian.org/security/2017/dsa-3987
Third Party Advisory https://www.debian.org/security/2017/dsa-4014
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-21/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-22/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-23/
Third Party Advisory http://www.securityfocus.com/bid/101059
Third Party Advisory http://www.securitytracker.com/id/1039465
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:2831
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:2885
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1396320
Mailing List https://lists.debian.org/debian-lts-announce/2017/11/msg00000.html
Third Party Advisory https://security.gentoo.org/glsa/201803-14
Third Party Advisory https://www.debian.org/security/2017/dsa-3987
and 4 more references
43
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 4/34 · Minimal
Exposure 18/34 · Moderate