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AUSCERT External Security Bulletin Redistribution
ESB-2021.0948
USN-4881-1: containerd vulnerability
18 March 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: containerd
Publisher: Ubuntu
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-21334
Original Bulletin:
https://ubuntu.com/security/notices/USN-4881-1
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running containerd check for an updated version of the software for
their operating system.
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USN-4881-1: containerd vulnerability
17 March 2021
The system could be made to expose sensitive information.
Releases
o Ubuntu 20.10
o Ubuntu 20.04 LTS
Packages
o containerd - daemon to control runC
Details
It was discovered that containerd incorrectly handled certain environment
variables. Contrary to expectations, a container could receive environment
variables defined for a different container, possibly containing sensitive
information.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.10
o containerd - 1.3.7-0ubuntu3.3
Ubuntu 20.04
o containerd - 1.3.3-0ubuntu2.3
After a standard system update you need to restart containerd to make
all the necessary changes.
References
o CVE-2021-21334
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