Runc Security Update for Arch Linux
Posted on: 05/17/2018 07:04 AM

A runc security advisory has been published for Arch Linux

Runc Security Update for Arch Linux

Arch Linux Security Advisory ASA-201805-11

Severity: High
Date : 2018-05-16
CVE-ID : CVE-2016-9962
Package : runc
Type : privilege escalation
Remote : No
Link :


The package runc before version 1.0.0rc5+19+g69663f0b-1 is vulnerable
to privilege escalation.


Upgrade to 1.0.0rc5+19+g69663f0b-1.

# pacman -Syu "runc>=1.0.0rc5+19+g69663f0b-1"

The problem has been fixed upstream in version 1.0.0rc5.




The runc component used by `docker exec` feature of docker allowed
additional container processes to be ptraced by the pid 1 of the
container. This allows the main processes of the container, if running
as root, to gain low-level access to these new processes during
initialization. An attacker can, depending on the nature of the
incoming process, leverage this to elevate access to the host. This
ranges from accessing host content through the file descriptors of the
incoming process to, potentially, a complete container escape by
leveraging memory access or syscall interception.


A local attacker is able to break out of the container or modify host
files via a crafted docker exec call.


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