CVE-2017-7791

moderate-risk
Published 2018-06-11

On pages containing an iframe, the "data:" protocol can be used to create a modal alert that will render over arbitrary domains following page navigation, spoofing of the origin of the modal alert from the iframe content. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.

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 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (20)

Affected Vendors

Debian Redhat Mozilla

References (22)

Third Party Advisory http://www.securityfocus.com/bid/100240
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=1365875
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/100240
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=1365875
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
45
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 4/34 · Minimal
Exposure 20/34 · Moderate