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CVE-2019-9506

Published: 13 August 2019

The Bluetooth BR/EDR specification up to and including version 5.1 permits sufficiently low encryption key length and does not prevent an attacker from influencing the key length negotiation. This allows practical brute-force attacks (aka "KNOB") that can decrypt traffic and inject arbitrary ciphertext without the victim noticing.

From the Ubuntu Security Team

Daniele Antonioli, Nils Ole Tippenhauer, and Kasper B. Rasmussen discovered that the Bluetooth protocol BR/EDR specification did not properly require sufficiently strong encryption key lengths. A physically proximate attacker could use this to expose sensitive information.

Notes

AuthorNote
sbeattie
CERT VU#918987
mdeslaur
Mitigation for this issue was added to the kernel
Priority

Medium

CVSS 3 base score: 8.1

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-60.67)
disco
Released (5.0.0-31.33)
eoan Not vulnerable
(5.2.0-8.9)
focal Not vulnerable
(5.4.0-9.12)
precise Ignored
(was needs-triage ESM criteria)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.2)
xenial
Released (4.4.0-159.187)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by d5bb334a8e171b262e48f378bd2096c0ea458265
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 693cd8ce3f882524a5d06f7800dd8492411877b3
Introduced by

693cd8ce3f882524a5d06f7800dd8492411877b3

Fixed by eca94432934fe5f141d084f2e36ee2c0e614cc04
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1047.49)
disco
Released (5.0.0-1018.20)
eoan Not vulnerable
(5.3.0-1003.3)
focal Not vulnerable
(5.4.0-1005.5)
precise Does not exist

trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.2)
xenial
Released (4.4.0-1090.101)
linux-aws-5.0
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.0.0-1021.24~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial Does not exist

linux-aws-hwe
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial
Released (4.15.0-1047.49~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(CONFIG_BT not set)
disco Not vulnerable
(CONFIG_BT not set)
eoan Not vulnerable
(CONFIG_BT not set)
focal Not vulnerable
(CONFIG_BT not set)
precise Does not exist

trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.2)
xenial Not vulnerable
(CONFIG_BT not set)
linux-azure-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1007.8~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial Does not exist

linux-azure-edge
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(CONFIG_BT not set)
disco Does not exist

eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial Not vulnerable
(CONFIG_BT not set)
linux-gcp
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1042.45)
disco
Released (5.0.0-1020.20)
eoan Not vulnerable
(5.3.0-1003.3)
focal Not vulnerable
(5.4.0-1005.5)
precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial
Released (4.15.0-1041.43)
linux-gcp-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1008.9~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial Does not exist

linux-gcp-edge
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1042.45)
disco Does not exist

eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial Does not exist

linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1041.43)
disco Does not exist

eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1020.20~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1011.12~18.04.1)
eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-31.33~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial
Released (4.15.0-60.67~16.04.1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(was pending \[5.3.0-19.20~18.04.2\] now end-of-life)
disco Does not exist

eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial
Released (4.15.0-60.67~16.04.1)
linux-kvm
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(CONFIG_BT not set)
disco Not vulnerable
(CONFIG_BT not set)
eoan Not vulnerable
(CONFIG_BT not set)
focal Not vulnerable
(CONFIG_BT not set)
precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial Not vulnerable
(CONFIG_BT not set)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

precise Ignored
(was needs-triage ESM criteria)
trusty Does not exist

upstream
Released (5.2)
xenial Does not exist

linux-lts-xenial
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

precise Does not exist

trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.2)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1056.65)
disco Ignored
(was pending \[4.15.0-1056.65\] now end-of-life)
eoan
Released (4.15.0-1059.68)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial Ignored
(was needs-triage now end-of-life)
linux-oem-5.6
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Does not exist

focal Not vulnerable
(5.4.0-1002.4)
precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial Does not exist

linux-oem-osp1
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1024.27)
disco Ignored
(reached end-of-life)
eoan
Released (5.0.0-1024.27)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1022.25)
disco
Released (5.0.0-1004.8)
eoan Not vulnerable
(5.3.0-1002.2)
focal Not vulnerable
(5.4.0-1005.5)
precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial
Released (4.15.0-1022.25~16.04.1)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.0.0-1007.12~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial Does not exist

linux-oracle-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1011.12~18.04.1)
eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1044.47)
disco
Released (5.0.0-1019.19)
eoan Not vulnerable
(5.3.0-1005.6)
focal Not vulnerable
(5.4.0-1004.4)
precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial
Released (4.4.0-1118.127)
linux-raspi2-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1017.19~18.04.1)
eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1062.69)
disco
Released (5.0.0-1023.24)
eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2)
xenial
Released (4.4.0-1122.128)