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From: Marc Deslauriers
Reply-To: Ubuntu Security
To: "ubuntu-security-announce@lists.ubuntu.com"
Message-ID: <70e79bce-114b-95f2-cb39-c54e5ded32ab@canonical.com>
Subject: [USN-5012-1] containerd vulnerabilities
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==========================================================================
Ubuntu Security Notice USN-5012-1
July 20, 2021
containerd vulnerabilities
==========================================================================
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:
containerd could be made to overwrite file permissions.
Software Description:
- containerd: daemon to control runC
Details:
It was discovered that containerd incorrectly handled file permission
changes. If a user or automated system were tricked into launching a
specially crafted container image, a remote attacker could change
permissions on files on the host filesystem and possibly escalate
privileges.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 21.04:
containerd 1.5.2-0ubuntu1~21.04.2
Ubuntu 20.10:
containerd 1.5.2-0ubuntu1~20.10.2
Ubuntu 20.04 LTS:
containerd 1.5.2-0ubuntu1~20.04.2
Ubuntu 18.04 LTS:
containerd 1.5.2-0ubuntu1~18.04.2
After a standard system update you need to restart containerd to make
all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5012-1
CVE-2021-32760
Package Information:
https://launchpad.net/ubuntu/+source/containerd/1.5.2-0ubuntu1~21.04.2
https://launchpad.net/ubuntu/+source/containerd/1.5.2-0ubuntu1~20.10.2
https://launchpad.net/ubuntu/+source/containerd/1.5.2-0ubuntu1~20.04.2
https://launchpad.net/ubuntu/+source/containerd/1.5.2-0ubuntu1~18.04.2
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