Auth bypass in Bluez
CVE-2021-3658
bluetoothd from bluez incorrectly saves adapters' Discoverable status when a device is powered down, and restores it when powered up. If a device is powered down while discoverable, it will be discoverable when powered on again. This could lead to inadvertent exposure of the bluetooth stack to physically nearby attackers.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.008 (54.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: -0.000
Affected products
- Bluez
- Fedoraproject Fedora — versions 34
- Bluez — versions Fixedin - 5.61 and above.
Weakness classification (CWE)
References
- gitlab.gnome.org/GNOME/gnome-bluetooth/-/issues/89 (Patch, Third Party Advisory, Issue Tracking)
- git.kernel.org/pub/scm/bluetooth/bluez.git/commit/ (Patch, Third Party Advisory)
- github.com/bluez/bluez/commit/b497b5942a8beb8f89ca1c359c54ad67ec843055 (Patch, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- security.netapp.com/advisory/ntap-20220407-0002/ (Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2021-3658?
- CVE-2021-3658 is a medium-severity vulnerability in Bluez, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2022-03-02.
- How severe is CVE-2021-3658?
- Medium severity. CVSS v3 base score is 6.5 out of 10.