A GNU cpio security update has been released for Ubuntu Linux 18.04 TLS, 20.04 LTS, and 21.04.
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Ubuntu Security Notice USN-5064-1
September 08, 2021
cpio vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
Summary:
GNU cpio could be made to crash or run programs if it opened a specially
crafted file.
Software Description:
- cpio: a tool to manage archives of files
Details:
Maverick Chung and Qiaoyi Fang discovered that cpio incorrectly handled
certain pattern files. A remote attacker could use this issue to cause cpio
to crash, resulting in a denial of service, or possibly execute arbitrary
code.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 21.04:
cpio 2.13+dfsg-4ubuntu0.3
Ubuntu 20.04 LTS:
cpio 2.13+dfsg-2ubuntu0.3
Ubuntu 18.04 LTS:
cpio 2.12+dfsg-6ubuntu0.18.04.4
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5064-1
CVE-2021-38185
Package Information:
https://launchpad.net/ubuntu/+source/cpio/2.13+dfsg-4ubuntu0.3
https://launchpad.net/ubuntu/+source/cpio/2.13+dfsg-2ubuntu0.3
https://launchpad.net/ubuntu/+source/cpio/2.12+dfsg-6ubuntu0.18.04.4
