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TI-2017-05385 Aliases CVE-2017-7765GHSA-983c-fhxg-vvqr

Improper input validation in Mozilla Firefox

Priority LOW 36CWE-20Published · Updated

Key facts

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

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

Summary

The "Mark of the Web" was not correctly saved on Windows when files with very long names were downloaded from the Internet. Without the Mark of the Web data, the security warning that Windows displays before running executables downloaded from the Internet is not shown. Note: This attack only affects Windows operating systems. Other operating systems are unaffected. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.

Why it matters now

EPSS 0.01333 71st percentileScored 2026-11-07
Fix Fixed Firefox (Mozilla): 54Firefox ESR (Mozilla): 52.2+1 more product

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefoxbefore 5454Patch availableCNA
MozillaFirefox ESRbefore 52.252.2Patch availableCNA
MozillaThunderbirdbefore 52.252.2Patch availableCNA
  • Firefox VendorMozilla Affected before 54 Fixed in 54 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 52.2 Fixed in 52.2 Patch available CNA
  • Thunderbird VendorMozilla Affected before 52.2 Fixed in 52.2 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 52.2.0; before 54.0VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 52.2.0VulnerableMozilla
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 52.2.0; before 54.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 52.2.0 Vulnerable ·Mozilla
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 54
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 52.2
  • Fix · CNA Thunderbird (Mozilla) Fixed in 52.2

Fixed in the same release

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

  • Release ·

    Mozilla Firefox 54

    12 records Highest priority Priority MEDIUM 1 MEDIUM, 11 LOW

    Other records, highest priority first

    • TI-2017-03494 Memory corruption in Mozilla FirefoxPriority MEDIUM 46
    • TI-2017-05382 Improper input validation in Mozilla FirefoxPriority LOW 37
    • TI-2017-05375 Untrusted search path in Mozilla FirefoxPriority LOW 37
    Show all 12 records →
  • Release ·

    Mozilla Firefox ESR 52.2

    8 records Highest priority Priority LOW 8 LOW

    Other records, highest priority first

    • TI-2017-05375 Untrusted search path in Mozilla FirefoxPriority LOW 37
    • TI-2017-05386 An attack using manipulation of "updater.ini" contents, used by the Mozilla Windows…Priority LOW 34
    • TI-2017-05380 The Mozilla Windows updater modifies some files to be updated by reading the original…Priority LOW 34
    Show all 8 records →
Show 1 more group
  • Release ·

    Mozilla Thunderbird 52.2

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2017-05375 Untrusted search path in Mozilla FirefoxPriority LOW 37
    • TI-2017-05383 Improper input validation in Mozilla FirefoxPriority LOW 26
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-7765
  2. 2026-10-03 Alias added: GHSA-983c-fhxg-vvqr

References

Advisory 4

  • 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