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Ubuntu 14.04 LTS : LXC regression (USN-2753-3)

high Nessus Plugin ID 86292

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 14.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-2753-3 advisory.

 USN-2753-1 fixed a vulnerability in LXC. The update caused a regression that prevented some containers from starting. This regression only affected containers that had a path that contained a '/./' directory specified as a bind mount target in their configuration file. This update fixes the problem. We apologize for the inconvenience.

 Original advisory details:

 Roman Fiedler discovered a directory traversal flaw in lxc-start. A local

 attacker with access to an LXC container could exploit this flaw to run

 programs inside the container that are not confined by AppArmor or expose

 unintended files in the host to the container.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-2753-3

Plugin Details

Severity: High

ID: 86292

File Name: ubuntu_USN-2753-3.nasl

Version: 2.11

Type: local

Agent: unix

Published: 10/6/2015

Updated: 8/28/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:python3-lxc, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:lxc-templates, p-cpe:/a:canonical:ubuntu_linux:lxc-tests, p-cpe:/a:canonical:ubuntu_linux:lxc-dev, p-cpe:/a:canonical:ubuntu_linux:lxc, p-cpe:/a:canonical:ubuntu_linux:liblxc1

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Ease: No known exploits are available

Patch Publication Date: 10/5/2015

Vulnerability Publication Date: 10/5/2015

Reference Information

USN: 2753-3