[manjaro-security] [ASA-201902-6] runc: privilege escalation
anthraxx at archlinux.org
Tue Feb 12 18:43:30 CET 2019
Arch Linux Security Advisory ASA-201902-6
Date : 2019-02-11
CVE-ID : CVE-2019-5736
Package : runc
Type : privilege escalation
Remote : Yes
Link : https://security.archlinux.org/AVG-878
The package runc before version 1.0.0rc6-1 is vulnerable to privilege
Upgrade to 1.0.0rc6-1.
# pacman -Syu "runc>=1.0.0rc6-1"
The problem has been fixed upstream in version 1.0.0rc6.
Don't run privileged containers.
A vulnerability discovered in runc through 1.0-rc6, as used in Docker
before 18.09.2 and other products, allows attackers to overwrite the
host runc binary (and consequently obtain host root access) by
leveraging the ability to execute a command as root within one of these
types of containers: (1) a new container with an attacker-controlled
image, or (2) an existing container, to which the attacker previously
had write access, that can be attached with docker exec. This occurs
because of file-descriptor mishandling, related to /proc/self/exe.
A malicious container can escalate privileges to gain access as root on
the host system and execute arbitrary code.
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