CVE-2019-8921
bluez - security update
6.5
MEDIUM
CVSS 3.1
EPSS 0.05%
Description
An issue was discovered in bluetoothd in BlueZ through 5.48. The vulnerability lies in the handling of a SVC_ATTR_REQ by the SDP implementation. By crafting a malicious CSTATE, it is possible to trick the server into returning more bytes than the buffer actually holds, resulting in leaking arbitrary heap data. The root cause can be found in the function service_attr_req of sdpd-request.c. The server does not check whether the CSTATE data is the same in consecutive requests, and instead simply trusts that it is the same.
How to fix CVE-2019-8921
To remediate CVE-2019-8921, upgrade the affected package to a fixed version below.
- —upgrade to 5.54-1 or later
- —upgrade to 5.43-2+deb9u5 or later
- —upgrade to 5.50-1.2~deb10u3 or later
Is CVE-2019-8921 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 5.54-1
- from 0, < 5.43-2+deb9u5
- from 0, < 5.50-1.2~deb10u3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |