Information disclosure in BlueZ

1) Incorrect authorization

EUVDB-ID: #VU83408

Risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-3658

CWE-ID: CWE-863 - Incorrect Authorization

Exploit availability: No

Description

The vulnerability allows an attacker to gain access to sensitive information.

The vulnerability exists due to bluetoothd incorrectly saves the adapters' discoverable status when a device is powered down, and restores it when powered up. An attacker with physical proximity to device can gain access to sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

BlueZ: 4.0 - 5.60

CPE2.3

• cpe:2.3:a:bluez.org:bluez:4.0:*:*:*:*:*:*:*
• cpe:2.3:a:bluez.org:bluez:4.1:*:*:*:*:*:*:*
• cpe:2.3:a:bluez.org:bluez:4.2:*:*:*:*:*:*:*

External links

https://gitlab.gnome.org/GNOME/gnome-bluetooth/-/issues/89
https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=b497b5942a8beb8f89ca1c359c54ad67ec843055
https://bugzilla.redhat.com/show_bug.cgi?id=1984728
https://github.com/bluez/bluez/commit/b497b5942a8beb8f89ca1c359c54ad67ec843055
https://security.netapp.com/advisory/ntap-20220407-0002/

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.