CVE-2017-7838

Description

Punycode format text will be displayed for entire qualified international domain names in some instances when a sub-domain triggers the punycode display instead of the primary domain being displayed in native script and the sub-domain only displaying as punycode. This could be used for limited spoofing attacks due to user confusion. This vulnerability affects Firefox < 57.

Category

5.3
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.29% Top 25%
Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
https://www.mozilla.org/security/advisories/mfsa2017-24/ vendor advisory
http://www.securityfocus.com/bid/101832 third party advisory vdb entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1399540 issue tracking permissions required
http://www.securitytracker.com/id/1039803 third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2017-7838?
CVE-2017-7838 has been scored as a medium severity vulnerability.
How to fix CVE-2017-7838?
To fix CVE-2017-7838, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-7838 being actively exploited in the wild?
It is possible that CVE-2017-7838 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-7838?
CVE-2017-7838 affects Mozilla Firefox.
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