CVE-2021-43400 Use after free in n/a
A use-after-free in BlueZ allows attackers to execute code or cause denial of service via a crafted Bluetooth disconnection during D-Bus processing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-43400?
CVE-2021-43400 is a critical use after free vulnerability in Debian Debian Linux, published on 4 Nov 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client disconnects during D-Bus processing of a WriteValue call.
Weakness: CWE-416
Which versions are affected by CVE-2021-43400?
It affects 2 products.
Products include Bluez Bluez, Debian Debian Linux.
How do I fix CVE-2021-43400?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2021-43400 being exploited?
There is no known exploitation of CVE-2021-43400 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2021-43400, GHSA-xgf8-98pj-cm5c, OESA-2022-1527, UBUNTU-CVE-2021-43400.