CVE-2020-26556

NameCVE-2020-26556
DescriptionMesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device, able to conduct a successful brute-force attack on an insufficiently random AuthValue before the provisioning procedure times out, to complete authentication by leveraging Malleable Commitment.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
bluez (PTS)stretch5.43-2+deb9u2fixed
stretch (security)5.43-2+deb9u5fixed
buster, buster (security)5.50-1.2~deb10u2vulnerable
bullseye5.55-3.1vulnerable
bookworm, sid5.64-2vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
bluezsourcestretch(not affected)
bluezsource(unstable)(unfixed)

Notes

[bullseye] - bluez <no-dsa> (Minor issue)
[buster] - bluez <no-dsa> (Minor issue)
[stretch] - bluez <not-affected> (Mesh support introduced later)
https://kb.cert.org/vuls/id/799380
https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/malleable/
https://bugzilla.redhat.com/show_bug.cgi?id=1960012

Search for package or bug name: Reporting problems