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CVE-2021-43400

Status Candidate

Overview

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.

Related Files

Ubuntu Security Notice USN-5155-1
Posted Nov 24, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5155-1 - It was discovered that BlueZ incorrectly handled the Discoverable status when a device is powered down. This could result in devices being powered up discoverable, contrary to expectations. This issue only affected Ubuntu 20.04 LTS, Ubuntu 21.04, and Ubuntu 21.10. It was discovered that BlueZ incorrectly handled certain memory operations. A remote attacker could possibly use this issue to cause BlueZ to consume resources, leading to a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2021-3658, CVE-2021-41229, CVE-2021-43400
SHA-256 | fb1f4d28536d31077de5fae1a663c61f51e52453558f017d24b62822f6fb50a1
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