CVE-2017-7763

MEDIUM

Firefox < 54 and Firefox ESR < 52.2 - Domain Spoofing via Tibetan Character Whitespace Rendering

Title source: llm
STIX 2.1

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.

References (6)

Core 6
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/99057
Vendor Advisory x_refsource_confirm
https://www.mozilla.org/security/advisories/mfsa2017-15/
Issue Tracking, Vendor Advisory x_refsource_confirm
https://bugzilla.mozilla.org/show_bug.cgi?id=1360309
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1038689
Vendor Advisory x_refsource_confirm
https://www.mozilla.org/security/advisories/mfsa2017-17/
Vendor Advisory x_refsource_confirm
https://www.mozilla.org/security/advisories/mfsa2017-16/

Scores

CVSS v3 5.3
EPSS 0.0051
EPSS Percentile 66.6%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Details

CWE
CWE-20
Status published
Products (4)
debian/debian_linux 8.0
debian/debian_linux 9.0
mozilla/firefox < 52.2.0
mozilla/thunderbird < 52.2.0
Published Jun 11, 2018
Tracked Since Feb 18, 2026