CVE-2019-8921
6.5 · MEDIUMOverview
CVE-2019-8921 is a medium-severity vulnerability affecting bluez bluez. It was published on November 29, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from bluez. Update bluez to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| bluez | bluez | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2019-8921?
CVE-2019-8921 is a medium-severity vulnerability affecting bluez bluez. It was published on November 29, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
How severe is CVE-2019-8921?
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2019-8921?
Check the references section for vendor advisories and patches from bluez. Update bluez to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2019-8921?
CyberStrike's AI-powered security agents can automatically detect CVE-2019-8921 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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