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Ubuntu 22.04 & 20.04: USN-7035-1 Critical: AppArmor Mount Bypass

AppArmor restrictions could be bypassed for rules allowing mount operations. ========================================================================== Ubuntu Security Notice USN-7035-1 September 25, 2024 apparmor vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: AppArmor restrictions could be bypassed for rules allowing mount operations Software Description: - apparmor: Linux security system Details: It was discovered that the AppArmor policy compiler incorrectly generated looser restrictions than expected for rules allowing mount operations. A local attacker could possibly use this to bypass AppArmor restrictions in applications where some mount operations were permitted. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS apparmor 3.0.4-2ubuntu2.4 Ubuntu 20.04 LTS apparmor 2.13.3-7ubuntu5.4 In general, a standard system update will make all the necessary changes. After this update, applications confined by policies with mount operations restrictions may need to have the rules updated. References: https://ubuntu.com/security/notices/USN-7035-1 https://bugs.launchpad.net/apparmor/+bug/1597017 CVE-2016-1585 Package Information: https://launchpad.net/ubuntu/+source/apparmor/3.0.4-2ubuntu2.4 . Ubuntu Security Update USN-7036-1 addresses a potential kernel flaw and outlines critical measures for safeguarding system integrity.. apparmor update, ubuntu advisory, apparmor restrictions, security instructions. . Severity: Critical. LinuxSecurity.com Team

Sep 25, 2024 •Critical Ubuntu