CVE-2017-7833

Description

Some Arabic and Indic vowel marker characters can be combined with Latin characters in a domain name to eclipse the non-Latin character with some font sets on the addressbar. The non-Latin character will not be visible to most viewers. This allows for domain spoofing attacks because these combined domain names do not display as punycode. 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 vdb entry third party advisory
http://www.securitytracker.com/id/1039803 vdb entry third party advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1370497 issue tracking permissions required

Frequently Asked Questions

What is the severity of CVE-2017-7833?
CVE-2017-7833 has been scored as a medium severity vulnerability.
How to fix CVE-2017-7833?
To fix CVE-2017-7833, 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-2017-7833 being actively exploited in the wild?
It is possible that CVE-2017-7833 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-2017-7833?
CVE-2017-7833 affects Mozilla Firefox.
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