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Ubuntu 23.04 USN-6088-1 Moderate: runC Privilege Escalation Threats

ubuntu
Calendar Grey May 18, 2023
Dist Ubuntu Esm H88
In light of multiple runC security flaws discovered in Ubuntu, critical patches have been deployed to bolster protection against potential threats.
Several security issues were fixed in runC.

Summary

Several security issues were fixed in runC.

Software Description:

- runc: Open Container Project

Details:

It was discovered that runC incorrectly made /sys/fs/cgroup

writable when in rootless mode. An attacker could possibly

use this issue to escalate privileges. (CVE-2023-25809)

It was discovered that runC incorrectly performed access control when

mounting /proc to non-directories. An attacker could possibly use

this issue to escalate privileges. (CVE-2023-27561)

It was discovered that runC incorrectly handled /proc and

/sys mounts inside a container. An attacker could possibly

use this issue to bypass AppArmor, and potentially SELinux.

(CVE-2023-28642)

Topics%20covered

Topics Covered

security advisory moderate privilege escalation ubuntu runC

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 23.04:
   runc                            1.1.4-0ubuntu3.1

Ubuntu 22.10:
   runc                            1.1.4-0ubuntu1~22.10.3

Ubuntu 22.04 LTS:
   runc                            1.1.4-0ubuntu1~22.04.3

Ubuntu 20.04 LTS:
   runc                            1.1.4-0ubuntu1~20.04.3

Ubuntu 18.04 LTS:
   runc                            1.1.4-0ubuntu1~18.04.2

In general, a standard system update will make all the necessary changes.

References

  https://ubuntu.com/security/notices/USN-6088-1

  CVE-2023-25809, CVE-2023-27561, CVE-2023-28642

Severity
important
Lowest
Low
Medium
High
Critical

May 18, 2023

Topics%20covered

Topics Covered

security advisory moderate privilege escalation ubuntu runC

Package Information

  https://launchpad.net/ubuntu/+source/runc/1.1.4-0ubuntu3.1
  https://launchpad.net/ubuntu/+source/runc/1.1.4-0ubuntu1~22.10.3
  https://launchpad.net/ubuntu/+source/runc/1.1.4-0ubuntu1~22.04.3
  https://launchpad.net/ubuntu/+source/runc/1.1.4-0ubuntu1~20.04.3
  https://launchpad.net/ubuntu/+source/runc/1.1.4-0ubuntu1~18.04.2

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