CVE-2019-11753

Mozilla: Privilege escalation with Mozilla Maintenance Service in custom Firefox installation location

Published Sep 27, 2019 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Description
The Firefox installer allows Firefox to be installed to a custom user writable location, leaving it unprotected from manipulation by unprivileged users or malware. If the Mozilla Maintenance Service is manipulated to update this unprotected location and the updated maintenance service in the unprotected location has been altered, the altered maintenance service can run with elevated privileges during the update process due to a lack of integrity checks. This allows for privilege escalation if the executable has been replaced locally. <br>*Note: This attack requires local system access and only affects Windows. Other operating systems are not affected.*. This vulnerability affects Firefox < 69, Firefox ESR < 60.9, and Firefox ESR < 68.1.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2019-3423 The Firefox installer allows Firefox to be installed to a custom user writable location, leaving it unprotected from manipulation by unprivileged users or malware. If the Mozilla Maintenance Service is manipulated to update this unprotected location and the updated maintenance service in the unprotected location has been altered, the altered maintenance service can run with elevated privileges during the update process due to a lack of integrity checks. This allows for privilege escalation if the executable has been replaced locally. <br>*Note: This attack requires local system access and only affects Windows. Other operating systems are not affected.*. This vulnerability affects Firefox < 69, Firefox ESR < 60.9, and Firefox ESR < 68.1.
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Aug 4, 2024, 11:03 PM
Reserved
May 3, 2019, 12:00 AM
Status
Modified
Published
Sep 27, 2019, 6:15 PM
Modified
Jun 17, 2026, 2:13 AM
Severity
Important
Public date
Sep 3, 2019, 12:00 AM