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Ubuntu 21.04: 4960-1 Critical: runC File Overwrite Threat

runC could be made to overwrite files as the administrator.. =========================================================================Ubuntu Security Notice USN-4960-1 May 19, 2021 runc vulnerability ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 21.04 - Ubuntu 20.10 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS Summary: runC could be made to overwrite files as the administrator. Software Description: - runc: Open Container Project Details: Etienne Champetier discovered that runC incorrectly checked mount targets. An attacker with a malicious container image could possibly mount the host filesystem into the container and escalate privileges. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04: runc 1.0.0~rc93-0ubuntu1.1 Ubuntu 20.10: runc 1.0.0~rc93-0ubuntu1~20.10.2 Ubuntu 20.04 LTS: runc 1.0.0~rc93-0ubuntu1~20.04.2 Ubuntu 18.04 LTS: runc 1.0.0~rc93-0ubuntu1~18.04.2 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-4960-1 CVE-2021-30465 Package Information: https://launchpad.net/ubuntu/+source/runc/1.0.0~rc93-0ubuntu1.1 https://launchpad.net/ubuntu/+source/runc/1.0.0~rc93-0ubuntu1~20.10.2 https://launchpad.net/ubuntu/+source/runc/1.0.0~rc93-0ubuntu1~20.04.2 https://launchpad.net/ubuntu/+source/runc/1.0.0~rc93-0ubuntu1~18.04.2 . Ubuntu Security Advisory USN-4960-1 reveals a vulnerability in runC that permits unauthorized file replacements by potential intruders. Apply the patch immediately!. runC Vulnerability, Ubuntu Security Notice, File Access Control. . Severity: Critical. LinuxSecurity.com Team

May 19, 2021 •Critical Ubuntu