Vulnerability · Published Oct 1, 2024 · Assigned by mitre
CVE-2021-37577
Medium 6.8
In plain English
A medium-severity authorization bypass via user-controlled key in the bluez package (Ubuntu). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).
Official description
Bluetooth LE and BR/EDR Secure Connections pairing and Secure Simple Pairing using the Passkey entry protocol in Bluetooth Core Specifications 2.1 through 5.3 may permit an unauthenticated man-in-the-middle attacker to identify the Passkey used during pairing by reflection of a crafted public key with the same X coordinate as the offered public key and by reflection of 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. This is a related issue to CVE-2020-26558.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | bluez | no fix listed | UBUNTU-CVE-2021-37577 |
| Ubuntu:24.04:LTS | bluez | no fix listed | UBUNTU-CVE-2021-37577 |
| Ubuntu:25.10 | bluez | no fix listed | UBUNTU-CVE-2021-37577 |
| Ubuntu:26.04:LTS | bluez | no fix listed | UBUNTU-CVE-2021-37577 |
| Ubuntu:26.10 | bluez | no fix listed | UBUNTU-CVE-2021-37577 |
Affected products (as reported)
Weakness: CWE-639 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L