Resource exhaustion in Bluez
CVE-2021-41229
BlueZ is a Bluetooth protocol stack for Linux. In affected versions a vulnerability exists in sdp_cstate_alloc_buf which allocates memory which will always be hung in the singly linked list of cstates and will not be freed. This will cause a memory leak over time. The data can be a very large object, which can be caused by an attacker continuously sending sdp packets and this may cause the service of the target device to crash.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.011 (62.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Bluez — versions = 5.58, 5.58
- Debian Debian_linux — versions 9.0, 10.0
Weakness classification (CWE)
References
- security-advisories@github.com (Exploit, Third Party Advisory)
- security-advisories@github.com (mailing-list, Mailing List, Third Party Advisory)
- security-advisories@github.com (Third Party Advisory)
- security-advisories@github.com (mailing-list, Mailing List, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2021-41229?
- CVE-2021-41229 is a medium-severity vulnerability in Bluez, classified under Uncontrolled Resource Consumption. CVSS score: 4.3/10. Published 2021-11-12.
- How severe is CVE-2021-41229?
- Medium severity. CVSS v3 base score is 4.3 out of 10.