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TI-2017-05449 Aliases CVE-2017-7832GHSA-mg37-fr9j-7cpg

Improper input validation in Mozilla Firefox

Priority LOW 27CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA.

Summary

The combined, single character, version of the letter 'i' with any of the potential accents in unicode, such as acute or grave, can be spoofed in the addressbar by the dotless version of 'i' followed by the same accent as a second character with most font sets. This allows for domain spoofing attacks because these combined domain names do not display as punycode. This vulnerability affects Firefox < 57.

Why it matters now

EPSS 0.01483 74th percentileScored 2026-11-07
Fix Fixed Firefox (Mozilla): 57

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefoxbefore 5757Patch availableCNA
  • Firefox VendorMozilla Affected before 57 Fixed in 57 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*up to 56.0.2VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions up to 56.0.2 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 57

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Mozilla Firefox 57

    12 records Highest priority Priority MEDIUM 1 MEDIUM, 11 LOW

    Other records, highest priority first

    • TI-2017-05444 Memory corruption in Mozilla FirefoxPriority MEDIUM 47
    • TI-2017-05452 Mixed content blocking of insecure (HTTP) sub-resources in a secure (HTTPS) document was…Priority LOW 35
    • TI-2017-05453 Uncontrolled search path in Mozilla FirefoxPriority LOW 34
    Show all 12 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-7832
  2. 2026-10-03 Alias added: GHSA-mg37-fr9j-7cpg

References

Advisory 1

Other 1

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 3444 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences