| Name | CVE-2020-26557 |
| Description | Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device (without possession of the AuthValue used in the provisioning protocol) to determine the AuthValue via a brute-force attack (unless the AuthValue is sufficiently random and changed each time). |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more) |
| Debian Bugs | 1006406 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| bluez (PTS) | stretch | 5.43-2+deb9u2 | fixed |
| stretch (security) | 5.43-2+deb9u5 | fixed | |
| buster, buster (security) | 5.50-1.2~deb10u2 | vulnerable | |
| bullseye | 5.55-3.1 | vulnerable | |
| bookworm, sid | 5.64-2 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| bluez | source | stretch | (not affected) | |||
| bluez | source | (unstable) | (unfixed) | 1006406 |
[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/predicatable-authvalue/
https://bugzilla.redhat.com/show_bug.cgi?id=1960009