| Name | CVE-2020-26558 |
| Description | Bluetooth LE and BR/EDR secure pairing in Bluetooth Core Specification 2.1 through 5.2 may permit a nearby man-in-the-middle attacker to identify the Passkey used during pairing (in the Passkey authentication procedure) by reflection of the public key and the authentication evidence of the initiating device, potentially permitting this attacker to complete authenticated pairing with the responding device using the correct Passkey for the pairing session. The attack methodology determines the Passkey value one bit at a time. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2689-1, DLA-2690-1, DLA-2692-1, DSA-4951-1 |
| Debian Bugs | 989614 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| bluez (PTS) | buster | 5.50-1.2~deb10u2 | fixed |
| buster (security) | 5.50-1.2~deb10u4 | fixed | |
| bullseye (security), bullseye | 5.55-3.1+deb11u1 | fixed | |
| bookworm, bookworm (security) | 5.66-1+deb12u1 | fixed | |
| trixie | 5.71-1 | fixed | |
| sid | 5.73-1 | fixed | |
| linux (PTS) | buster | 4.19.249-2 | fixed |
| buster (security) | 4.19.304-1 | fixed | |
| bullseye | 5.10.209-2 | fixed | |
| bullseye (security) | 5.10.205-2 | fixed | |
| bookworm | 6.1.76-1 | fixed | |
| bookworm (security) | 6.1.85-1 | fixed | |
| trixie | 6.6.15-2 | fixed | |
| sid | 6.7.9-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| bluez | source | stretch | 5.43-2+deb9u4 | DLA-2692-1 | ||
| bluez | source | buster | 5.50-1.2~deb10u2 | DSA-4951-1 | ||
| bluez | source | (unstable) | 5.55-3.1 | 989614 | ||
| linux | source | stretch | 4.9.272-1 | DLA-2689-1 | ||
| linux | source | buster | 4.19.194-1 | |||
| linux | source | (unstable) | 5.10.40-1 | |||
| linux-4.19 | source | stretch | 4.19.194-1~deb9u1 | DLA-2690-1 |
https://kb.cert.org/vuls/id/799380
https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/passkey-entry/
https://bugzilla.redhat.com/show_bug.cgi?id=1918602
https://git.kernel.org/linus/6d19628f539fccf899298ff02ee4c73e4bf6df3f
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00517.html
https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=00da0fb4972cf59e1c075f313da81ea549cb8738