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AUSCERT External Security Bulletin Redistribution
ESB-2021.3031
USN-5064-1: GNU cpio vulnerability
9 September 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: cpio
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-38185
Reference: ESB-2021.2783
ESB-2021.2765
ESB-2021.2745
Original Bulletin:
https://ubuntu.com/security/notices/USN-5064-1
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USN-5064-1: GNU cpio vulnerability
08 September 2021
GNU cpio could be made to crash or run programs if it opened a specially
crafted file.
Releases
o Ubuntu 21.04
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
Packages
o 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
o cpio - 2.13+dfsg-4ubuntu0.3
Ubuntu 20.04
o cpio - 2.13+dfsg-2ubuntu0.3
Ubuntu 18.04
o cpio - 2.12+dfsg-6ubuntu0.18.04.4
In general, a standard system update will make all the necessary changes.
References
o CVE-2021-38185
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