Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bluez | Bluez | <= 5.48 |
| Linux | Linux Kernel | - |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- https://lists.debian.org/debian-lts-announce/2022/10/msg00026.htmlMailing ListThird Party Advisory
- https://security.netapp.com/advisory/ntap-20211203-0002/Third Party Advisory
- https://ssd-disclosure.com/ssd-advisory-linux-bluez-information-leak-and-heap-ovExploitPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/10/msg00026.htmlMailing ListThird Party Advisory
- https://security.netapp.com/advisory/ntap-20211203-0002/Third Party Advisory
- https://ssd-disclosure.com/ssd-advisory-linux-bluez-information-leak-and-heap-ovExploitPatchThird Party Advisory
FAQ
What is CVE-2019-8921?
CVE-2019-8921 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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...
How severe is CVE-2019-8921?
CVE-2019-8921 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-8921?
Check the references section above for vendor advisories and patch information. Affected products include: Bluez Bluez, Linux Linux Kernel, Debian Debian Linux.