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Fencer Intel
medium 5.3

CVE-2017-7825 json

Several fonts on OS X display some Tibetan and Arabic characters as whitespace.

published 2018-06-11 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-16800

cvss
5.3
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits
0
none known

Summary

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.

Patch / fix

  • Mozilla Firefox 56
  • Mozilla Firefox ESR 52.4
  • Mozilla Thunderbird 52.4
  • mozilla-nss SLES 11 SP4, SLES 11 SP3-TERADATA, SLE Software Development Kit 11 SP4 +3 more 3.29.5-47.6.1
  • MozillaFirefox SLES 11 SP4, SLES 11 SP3-TERADATA, SLE Software Development Kit 11 SP4 +3 more 52.4.0esr-72.13.2
  • mozilla-nss SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES for SAP 12 SP1 +10 more 3.29.5-58.3.1
  • MozillaFirefox SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES for SAP 12 SP1 +10 more 52.4.0esr-109.6.2

suse advisories SUSE-SU-2017:2872-1SUSE-SU-2017:2872-2SUSE-SU-2017:2688-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 92.0-1.2
  • MozillaThunderbird openSUSE Tumbleweed 91.1.1-1.1
  • MozillaThunderbird Package Hub 12 52.4.0-45.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10600-1openSUSE-SU-2024:10601-1openSUSE-SU-2017:2707-1openSUSE-SU-2017:2710-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-7825 updated cvss 6.1

Mozilla: OS X fonts render some Tibetan and Arabic unicode characters as spaces (MFSA 2017-22)

  • Red Hat Enterprise Linux 6 firefox, thunderbird Red Hat Enterprise Linux 7 firefox, thunderbird
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.60% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected products

  • Mozilla Firefox
  • Mozilla Firefox ESR
  • Mozilla Thunderbird

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.