CVE-2017-7838

MEDIUM

Firefox < 57 - Limited Spoofing via Punycode Subdomain Display

Title source: llm

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.

References (4)

Core 4

Core References

Vendor Advisory x_refsource_confirm

https://www.mozilla.org/security/advisories/mfsa2017-24/

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/101832

Issue Tracking, Permissions Required x_refsource_confirm

https://bugzilla.mozilla.org/show_bug.cgi?id=1399540

Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack

http://www.securitytracker.com/id/1039803

Scores

CVSS v3 5.3

EPSS 0.0107

EPSS Percentile 78.0%

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 < 56.0.2

Published Jun 11, 2018

Tracked Since Feb 18, 2026