What’s Vulnerable › Vulnerabilities

CVE-2017-7825

• Severity: medium (CVSS 5.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-06-11 · updated 2026-06-17
• Weakness: CWE-20

Description

Several fonts on OS X display some Tibetan and Arabic 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 < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

Affected products

• Debian Linux: 7.0
• Mozilla Firefox: before 52.4.0; before 56.0 — fixed in 52.4.0, 56.0
• Mozilla Thunderbird: before 52.4.0 — fixed in 52.4.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 52.4.0, 56.0; Mozilla Thunderbird 52.4.0. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/101059
• http://www.securitytracker.com/id/1039465
• https://bugzilla.mozilla.org/show_bug.cgi?id=1390980
• https://bugzilla.mozilla.org/show_bug.cgi?id=1393624
• https://lists.debian.org/debian-lts-announce/2017/11/msg00000.html
• https://security.gentoo.org/glsa/201803-14
• https://www.mozilla.org/security/advisories/mfsa2017-21/
• https://www.mozilla.org/security/advisories/mfsa2017-22/
• https://www.mozilla.org/security/advisories/mfsa2017-23/
• http://www.securityfocus.com/bid/101059
• http://www.securitytracker.com/id/1039465
• https://bugzilla.mozilla.org/show_bug.cgi?id=1390980

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