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CVE-2017-7838 Punycode format text will be displayed for entire qualified international domain names in some instances when a…

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.

Affected products and versions

Product Affected versions Fixed in
Firefox 57 earliest → < 57 57

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