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
| Author | Note |
|---|---|
| sbeattie | CERT VU#918987 |
| mdeslaur | Mitigation for this issue was added to the kernel |
Priority
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 Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Introduced by 693cd8ce3f882524a5d06f7800dd8492411877b3 |
||
|
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)
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.1 |
| Attack vector | Adjacent |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9506
- https://www.usenix.org/conference/usenixsecurity19/presentation/antonioli
- https://knobattack.com/
- https://www.bluetooth.com/security/statement-key-negotiation-of-bluetooth/
- https://ubuntu.com/security/notices/USN-4115-1
- https://ubuntu.com/security/notices/USN-4118-1
- https://ubuntu.com/security/notices/USN-4147-1
- NVD
- Launchpad
- Debian