========================================================================= Ubuntu Security Notice USN-4958-1 May 17, 2021 caribou vulnerability ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.10 - Ubuntu 20.04 LTS Summary: Applications using Caribou could be made to crash if given specially crafted input. Software Description: - caribou: Configurable on screen keyboard with scanning mode Details: It was discovered that the Caribou onscreen keyboard could be made to crash when given certain input values. An attacker could use this to bypass screen-locking applications that support using Caribou as an input mechanism. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10: gir1.2-caribou-1.0 0.4.21-7ubuntu0.20.10.1 libcaribou0 0.4.21-7ubuntu0.20.10.1 Ubuntu 20.04 LTS: gir1.2-caribou-1.0 0.4.21-7ubuntu0.20.04.1 libcaribou0 0.4.21-7ubuntu0.20.04.1 After a standard system update you need to restart applications that use Caribou as an onscreen keyboard to make all the necessary changes. References: https://ubuntu.com/security/notices/USN-4958-1 https://launchpad.net/bugs/1912060 Package Information: https://launchpad.net/ubuntu/+source/caribou/0.4.21-7ubuntu0.20.10.1 https://launchpad.net/ubuntu/+source/caribou/0.4.21-7ubuntu0.20.04.1