CVE-2019-11753 Information

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. brNote: 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.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html https://bugzilla.mozilla.org/show_bug.cgi?id=1574980 https://www.mozilla.org/security/advisories/mfsa2019-25/ https://www.mozilla.org/security/advisories/mfsa2019-26/ https://www.mozilla.org/security/advisories/mfsa2019-27/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8