Bug 1748659 (CVE-2019-11753) - CVE-2019-11753 Mozilla: Privilege escalation with Mozilla Maintenance Service in custom Firefox installation location
Summary: CVE-2019-11753 Mozilla: Privilege escalation with Mozilla Maintenance Service...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2019-11753
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1745825
TreeView+ depends on / blocked
 
Reported: 2019-09-04 00:47 UTC by Doran Moppert
Modified: 2021-02-16 21:25 UTC (History)
3 users (show)

Fixed In Version: firefox 60.9, firefox 68.1
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-09-04 01:07:20 UTC


Attachments (Terms of Use)

Description Doran Moppert 2019-09-04 00:47:34 UTC
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. 

*Note: This attack requires local system access and only affects Windows. Other operating systems are not affected.*



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2019-27/#CVE-2019-11753

Comment 1 Doran Moppert 2019-09-04 00:47:36 UTC
Acknowledgments:

Name: the Mozilla project
Upstream: Holger Fuhrmannek

Comment 2 Doran Moppert 2019-09-04 00:52:55 UTC
Statement:

This vulnerability only affected Firefox on the Windows operating system.  Firefox on Red Hat Enterprise Linux is not affected.

Comment 3 Product Security DevOps Team 2019-09-04 01:07:20 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-11753


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