Bug 1872530 (CVE-2020-15663) - CVE-2020-15663 Mozilla: Downgrade attack on the Mozilla Maintenance Service could have resulted in escalation of privilege
Summary: CVE-2020-15663 Mozilla: Downgrade attack on the Mozilla Maintenance Service c...
Alias: CVE-2020-15663
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On:
Blocks: 1870411
TreeView+ depends on / blocked
Reported: 2020-08-26 02:43 UTC by Doran Moppert
Modified: 2021-10-05 06:42 UTC (History)
4 users (show)

Fixed In Version: firefox 68.12, thunderbird 78.2
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Clone Of:
Last Closed: 2020-08-26 07:17:29 UTC

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Description Doran Moppert 2020-08-26 02:43:23 UTC
If Firefox is installed to a user-writable directory, the Mozilla Maintenance Service would execute updater.exe from the install location with system privileges. Although the Mozilla Maintenance Service does ensure that updater.exe is signed by Mozilla, the version could have been rolled back to a previous version which would have allowed exploitation of an older bug and arbitrary code execution with System Privileges.

*Note: This issue only affected Windows operating systems. Other operating systems are unaffected.*

External Reference:


Comment 1 Doran Moppert 2020-08-26 02:43:28 UTC

Name: the Mozilla project
Upstream: Xiaoyin Liu

Comment 2 Product Security DevOps Team 2020-08-26 07:17:29 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):


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