CVE-2019-8921 Information disclosure in n/a
A remote attacker can leak arbitrary heap data from the BlueZ Bluetooth daemon by sending crafted SDP requests, potentially exposing sensitive memory contents.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-8921?
CVE-2019-8921 is a medium-severity vulnerability in Debian Debian Linux, published on 29 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-345
Which versions are affected by CVE-2019-8921?
It affects 2 products.
Products include Bluez Bluez, Debian Debian Linux.
How do I fix CVE-2019-8921?
Apply the vendor's patch.
Is CVE-2019-8921 being exploited?
There is no known exploitation of CVE-2019-8921 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2019-8921, GHSA-69h8-fh92-ch8q, UBUNTU-CVE-2019-8921.