CVE-2018-5121

MEDIUM

Firefox < 58 - Domain Name Spoofing via Tibetan Character Rendering

Title source: llm

Description

Low descenders on some Tibetan characters in several fonts on OS X are clipped when rendered in the addressbar. When used as part of an Internationalized Domain Name (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 < 58.

References (4)

Core 4

Core References

Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack

http://www.securitytracker.com/id/1040270

Issue Tracking, Permissions Required x_refsource_confirm

https://bugzilla.mozilla.org/show_bug.cgi?id=1402368

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/102786

Vendor Advisory x_refsource_confirm

https://www.mozilla.org/security/advisories/mfsa2018-02/

Scores

CVSS v3 5.3

EPSS 0.0098

EPSS Percentile 77.0%

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 (1)

mozilla/firefox < 57.0.4

Published Jun 11, 2018

Tracked Since Feb 18, 2026