CVE-2021-21367
Elementary OS Switchboard Bluetooth Unauthorized Pairing Vulnerability
Description
Switchboard Bluetooth Plug for elementary OS from version 2.3.0 and before version version 2.3.5 has an incorrect authorization vulnerability. When the Bluetooth plug is running (in discoverable mode), Bluetooth service requests and pairing requests are automatically accepted, allowing physically proximate attackers to pair with a device running an affected version of switchboard-plug-bluetooth without the active consent of the user. By default, elementary OS doesn't expose any services via Bluetooth that allow information to be extracted by paired Bluetooth devices. However, if such services (i.e. contact list sharing software) have been installed, it's possible that attackers have been able to extract data from such services without authorization. If no such services have been installed, attackers are only able to pair with a device running an affected version without authorization and then play audio out of the device or possibly present a HID device (keyboard, mouse, etc...) to control the device. As such, users should check the list of trusted/paired devices and remove any that are not 100% confirmed to be genuine. This is fixed in version 2.3.5. To reduce the likelihood of this vulnerability on an unpatched version, only open the Bluetooth plug for short intervals when absolutely necessary and preferably not in crowded public areas. To mitigate the risk entirely with unpatched versions, do not open the Bluetooth plug within switchboard at all, and use a different method for pairing devices if necessary (e.g. `bluetoothctl` CLI).
INFO
Published Date :
March 12, 2021, 5:15 p.m.
Last Modified :
Nov. 7, 2023, 3:29 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.2
Exploitability Score :
2.8
Affected Products
The following products are affected by CVE-2021-21367
vulnerability.
Even if cvefeed.io
is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-21367
.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-21367
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-21367
vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O7TCGM4B45VLUJDCE5PHFYA5KBNHD4RA/ [No types assigned] Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AV7WKO5SZHTF3QEMX4WZ576HRECIG6VQ/ [No types assigned] Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SWUPPVFG76PXQA3AHSGKYPRMVZ5AYHZI/ [No types assigned] Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/O7TCGM4B45VLUJDCE5PHFYA5KBNHD4RA/ Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/AV7WKO5SZHTF3QEMX4WZ576HRECIG6VQ/ Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/SWUPPVFG76PXQA3AHSGKYPRMVZ5AYHZI/ -
Initial Analysis by [email protected]
Mar. 23, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:A/AC:M/Au:N/C:P/I:P/A:N) Added CVSS V3.1 NIST AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Changed Reference Type https://github.com/elementary/switchboard-plug-bluetooth/commit/86500e645a907538abafe5225b67cc12c03e7645 No Types Assigned https://github.com/elementary/switchboard-plug-bluetooth/commit/86500e645a907538abafe5225b67cc12c03e7645 Patch, Third Party Advisory Changed Reference Type https://github.com/elementary/switchboard-plug-bluetooth/releases/tag/2.3.5 No Types Assigned https://github.com/elementary/switchboard-plug-bluetooth/releases/tag/2.3.5 Release Notes, Third Party Advisory Changed Reference Type https://github.com/elementary/switchboard-plug-bluetooth/security/advisories/GHSA-5p3g-j69g-w2mq No Types Assigned https://github.com/elementary/switchboard-plug-bluetooth/security/advisories/GHSA-5p3g-j69g-w2mq Patch, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/AV7WKO5SZHTF3QEMX4WZ576HRECIG6VQ/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/AV7WKO5SZHTF3QEMX4WZ576HRECIG6VQ/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/O7TCGM4B45VLUJDCE5PHFYA5KBNHD4RA/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/O7TCGM4B45VLUJDCE5PHFYA5KBNHD4RA/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/SWUPPVFG76PXQA3AHSGKYPRMVZ5AYHZI/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/SWUPPVFG76PXQA3AHSGKYPRMVZ5AYHZI/ Mailing List, Third Party Advisory Added CWE NIST CWE-863 Added CPE Configuration OR *cpe:2.3:a:elementary:switchboard_bluetooth_plug:*:*:*:*:*:elementary_os:*:* versions from (including) 2.3.0 up to (excluding) 2.3.5 Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Mar. 19, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/SWUPPVFG76PXQA3AHSGKYPRMVZ5AYHZI/ [No Types Assigned] -
CVE Modified by [email protected]
Mar. 18, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/AV7WKO5SZHTF3QEMX4WZ576HRECIG6VQ/ [No Types Assigned] -
CVE Modified by [email protected]
Mar. 17, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/O7TCGM4B45VLUJDCE5PHFYA5KBNHD4RA/ [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-21367
is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-21367
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.09 }} 0.01%
score
0.38701
percentile