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CVE-2017-7763 Default fonts on OS X display some Tibetan characters as whitespace

Description

Default fonts on OS X display some Tibetan characters as whitespace. When used in the addressbar as part of an IDN this can be used for domain name spoofing attacks. Note: This attack only affects OS X operating systems. Other operating systems are unaffected. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.

Affected products and versions

Product Affected versions Fixed in
Firefox 54 earliest → < 54 54
Firefox ESR 52.2 earliest → < 52.2 52.2
Thunderbird 52.2 earliest → < 52.2 52.2

References

Timeline

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