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

ubuntu
Calendar Grey September 25, 2024
Dist Ubuntu Esm H88
Ubuntu Security Update USN-7036-1 addresses a potential kernel flaw and outlines critical measures for safeguarding system integrity.
AppArmor restrictions could be bypassed for rules allowing mount operations

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.

Topics%20covered

Topics Covered

security advisory update instructions ubuntu apparmor restriction bypass mount operation

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

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7035-1

Topics%20covered

Topics Covered

security advisory update instructions ubuntu apparmor restriction bypass mount operation

Package Information

https://launchpad.net/ubuntu/+source/apparmor/3.0.4-2ubuntu2.4

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