CVE-2017-7763

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 54 Firefox ESR versions prior to 52.2 Thunderbird versions prior to 52.2

Description The issue affects the display of certain Tibetan characters in the address bar on OS X operating systems, potentially leading to domain name spoofing attacks. This is due to the default fonts on OS X displaying some Tibetan characters as whitespace. The estimated number of potentially affected devices is not specified.

Recommendations For Firefox versions prior to 54, update to version 54 or later. For Firefox ESR versions prior to 52.2, update to version 52.2 or later. For Thunderbird versions prior to 52.2, update to version 52.2 or later.