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AUSCERT External Security Bulletin Redistribution
ESB-2020.0850
USN-4297-1: runC vulnerabilities
10 March 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: runC
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Increased Privileges -- Existing Account
Denial of Service -- Existing Account
Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-19921 CVE-2019-16884
Reference: ESB-2020.0461
ESB-2020.0115
ESB-2020.0074
ESB-2019.3972
Original Bulletin:
https://usn.ubuntu.com/4297-1/
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USN-4297-1: runC vulnerabilities
9 March 2020
runc vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.10
o Ubuntu 18.04 LTS
Summary
Several security issues were fixed in runc.
Software Description
o runc - Open Container Project
Details
It was discovered that runC incorrectly checked mount targets. An attacker with
a malicious container image could possibly mount over the /proc directory and
escalate privileges. This issue only affected Ubuntu 18.04 LTS.
(CVE-2019-16884)
It was discovered that runC incorrectly performed access control. An attacker
could possibly use this issue to escalate privileges. (CVE-2019-19921)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 19.10
runc - 1.0.0~rc10-0ubuntu1~19.10.2
Ubuntu 18.04 LTS
runc - 1.0.0~rc10-0ubuntu1~18.04.2
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o CVE-2019-16884
o CVE-2019-19921
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