Bug 1844316 (CVE-2020-10759) - CVE-2020-10759 fwupd: Possible bypass in signature verification
Summary: CVE-2020-10759 fwupd: Possible bypass in signature verification
Keywords:
Status: MODIFIED
Alias: CVE-2020-10759
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1844324 1844317 1844323
Blocks: 1844141
TreeView+ depends on / blocked
 
Reported: 2020-06-05 04:15 UTC by Huzaifa S. Sidhpurwala
Modified: 2020-06-24 13:04 UTC (History)
1 user (show)

Fixed In Version:
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A PGP signature bypass flaw was found in fwupd, which could lead to the installation of unsigned firmware. As per upstream, a signature bypass is theoretically possible, but not practical because the Linux Vendor Firmware Service (LVFS) is either not implemented or enabled in versions of fwupd shipped with Red Hat Enterprise Linux 7 and 8. The highest threat from this vulnerability is to confidentiality and integrity.
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Environment:
Last Closed:


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Description Huzaifa S. Sidhpurwala 2020-06-05 04:15:35 UTC
A PGP signature bypass was found in fwupd, which could lead to possible installation of unsigned firmware.

As per upstream:

* For Red Hat Enterprise Linux 7: LVFS (LVFS (Linux Vendor Firmware Service) is: a secure portal which allows hardware vendors to upload firmware updates. The site is used by all major Linux distributions to provide metadata for clients such as fwupdmgr and GNOME Software.) was never enabled there although the PGP bypass is possible but not implementable.

* For Red Hat Enterprise Linux 8: The LVFS is disabled and never used the Amazon CDN. PGP bypass possible, but not implementable.

More information available at:
https://bugzilla.redhat.com/show_bug.cgi?id=1841462

Comment 1 Huzaifa S. Sidhpurwala 2020-06-05 04:15:40 UTC
Acknowledgments:

Name: Justin Steven

Comment 2 Huzaifa S. Sidhpurwala 2020-06-05 04:16:12 UTC
Created fwupd tracking bugs for this issue:

Affects: fedora-all [bug 1844317]

Comment 6 Huzaifa S. Sidhpurwala 2020-06-09 04:05:02 UTC
Upstream commits:
https://github.com/fwupd/fwupd/commit/21f2d12
https://github.com/hughsie/libjcat/commit/839b89f


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