-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.2445
                  USN-5012-1: containerd vulnerabilities
                               21 July 2021

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           containerd
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Modify Permissions -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-32760  

Reference:         ESB-2021.2440

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-5012-1

- --------------------------BEGIN INCLUDED TEXT--------------------

USN-5012-1: containerd vulnerabilities
20 July 2021

containerd could be made to overwrite file permissions.
Releases

  o Ubuntu 21.04
  o Ubuntu 20.10
  o Ubuntu 20.04 LTS
  o Ubuntu 18.04 LTS

Packages

  o 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

  o containerd - 1.5.2-0ubuntu1~21.04.2

Ubuntu 20.10

  o containerd - 1.5.2-0ubuntu1~20.10.2

Ubuntu 20.04

  o containerd - 1.5.2-0ubuntu1~20.04.2

Ubuntu 18.04

  o 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

  o CVE-2021-32760

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=zw/i
-----END PGP SIGNATURE-----