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AUSCERT External Security Bulletin Redistribution
USN-4297-1: runC vulnerabilities
10 March 2020
AusCERT Security Bulletin Summary
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Increased Privileges -- Existing Account
Denial of Service -- Existing Account
Unauthorised Access -- Remote/Unauthenticated
CVE Names: CVE-2019-19921 CVE-2019-16884
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USN-4297-1: runC vulnerabilities
9 March 2020
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.10
o Ubuntu 18.04 LTS
Several security issues were fixed in runc.
o runc - Open Container Project
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.
It was discovered that runC incorrectly performed access control. An attacker
could possibly use this issue to escalate privileges. (CVE-2019-19921)
The problem can be corrected by updating your system to the following package
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://
In general, a standard system update will make all the necessary changes.
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