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TI-2019-08793 Aliases CVE-2019-11736GHSA-g4fc-6wpg-63m2

Race condition in Mozilla Firefox

Priority LOW 30CWE-362Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

The Mozilla Maintenance Service does not guard against files being hardlinked to another file in the updates directory, allowing for the replacement of local files, including the Maintenance Service executable, which is run with privileged access. Additionally, there was a race condition during checks for junctions and symbolic links by the Maintenance Service, allowing for potential local file and directory manipulation to be undetected in some circumstances. This allows for potential privilege escalation by a user with unprivileged local access. <br>*Note: These attacks requires local system access and only affects Windows. Other operating systems are not affected.*. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.

Why it matters now

EPSS 0.00209 11th percentileScored 2026-11-07
Fix Partial Firefox (Mozilla): 69Firefox ESR (Mozilla): 68.1Red Hat: 1 without a fix

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefoxbefore 6969Patch availableCNA
MozillaFirefox ESRbefore 68.168.1Patch availableCNA
  • Firefox VendorMozilla Affected before 69 Fixed in 69 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 68.1 Fixed in 68.1 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 69.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*before 68.1.0VulnerableMozilla
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 69.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 68.1.0 Vulnerable ·Mozilla
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 69
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 68.1

Fixed in the same release

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

  • Release ·

    Mozilla Firefox 69

    12 records Highest priority Priority MEDIUM 3 MEDIUM, 9 LOW

    Other records, highest priority first

    • TI-2019-08791 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 45
    • TI-2019-08808 Logging-related command line parameters are not properly sanitized when Firefox is…Priority MEDIUM 40
    • TI-2019-08792 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 40
    Show all 12 records →
  • Release ·

    Mozilla Firefox ESR 68.1

    8 records Highest priority Priority MEDIUM 2 MEDIUM, 6 LOW

    Other records, highest priority first

    • TI-2019-08808 Logging-related command line parameters are not properly sanitized when Firefox is…Priority MEDIUM 40
    • TI-2019-08792 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 40
    • TI-2019-08807 Type confusion in Mozilla FirefoxPriority LOW 31
    Show all 8 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Out of support scope
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-11736
  2. 2026-10-03 Alias added: GHSA-g4fc-6wpg-63m2

References

Advisory 6

  • 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