CVE-2020-10759

NameCVE-2020-10759
DescriptionA PGP signature bypass flaw was found in fwupd (all versions), 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2274-1
NVD severitylow
Debian Bugs962517

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
fwupd (PTS)stretch0.8.3-1fixed
stretch (security)0.7.4-2+deb9u1fixed
buster1.2.13-2fixed
bullseye, sid1.4.6-2fixed
libjcat (PTS)bullseye, sid0.1.3-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
fwupdsourcestretch0.7.4-2+deb9u1DLA-2274-1
fwupdsourcebuster1.2.13-1
fwupdsource(unstable)1.3.10-1962517
libjcatsource(unstable)0.1.3-1

Notes

https://bugzilla.redhat.com/show_bug.cgi?id=1844316
https://github.com/justinsteven/advisories/blob/master/2020_fwupd_dangling_s3_bucket_and_CVE-2020-10759_signature_verification_bypass.md
Fixed by: https://github.com/fwupd/fwupd/commit/21f2d12fccef63b8aaa99ec53278ce18250b0444 (1.3.10)
Introduced with: https://github.com/fwupd/fwupd/commit/36a889034c3d34ae4ac4530ea7b6b16e82476fae (0.1.2)
https://github.com/hughsie/libjcat/commit/839b89f45a38b2373bf5836337a33f450aaab72e

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