CVE-2017-7770

low-risk
Published 2018-06-11

A mechanism where when a new tab is loaded through JavaScript events, if fullscreen mode is then entered, the addressbar will not be rendered. This would allow a malicious site to displayed a spoofed addressbar, showing the location of an arbitrary website instead of the one loaded. Note: this issue only affects Firefox for Android. Desktop Firefox is unaffected. This vulnerability affects Firefox < 54.

Do I need to act?

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0.37% chance of exploitation
EPSS score — low exploit probability
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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 5.9/10 Medium
NETWORK / HIGH complexity

Affected Products (1)

Affected Vendors

Mozilla

References (8)

Third Party Advisory http://www.securityfocus.com/bid/99049
Third Party Advisory http://www.securitytracker.com/id/1038689
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1317242
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-15/
Third Party Advisory http://www.securityfocus.com/bid/99049
Third Party Advisory http://www.securitytracker.com/id/1038689
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1317242
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-15/
24
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal