============================================================================
Ubuntu Security Notice USN-2906-1
February 22, 2016

cpio vulnerabilities
============================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 15.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in GNU cpio.

Software Description:
- cpio: a tool to manage archives of files

Details:

Alexander Cherepanov discovered that GNU cpio incorrectly handled symbolic
links when used with the --no-absolute-filenames option. If a user or
automated system were tricked into extracting a specially-crafted cpio
archive, a remote attacker could possibly use this issue to write arbitrary
files. This issue only affected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS.
(CVE-2015-1197)

Gustavo Grieco discovered that GNU cpio incorrectly handled memory when
extracting archive files. If a user or automated system were tricked into
extracting a specially-crafted cpio archive, a remote attacker could use
this issue to cause GNU cpio to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2016-2037)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 15.10:
  cpio                            2.11+dfsg-4.1ubuntu1.1

Ubuntu 14.04 LTS:
  cpio                            2.11+dfsg-1ubuntu1.2

Ubuntu 12.04 LTS:
  cpio                            2.11-7ubuntu3.2

In general, a standard system update will make all the necessary changes.

References:
  https://www.ubuntu.com/usn/usn-2906-1
  CVE-2015-1197, CVE-2016-2037

Package Information:
  https://launchpad.net/ubuntu/+source/cpio/2.11+dfsg-4.1ubuntu1.1
  https://launchpad.net/ubuntu/+source/cpio/2.11+dfsg-1ubuntu1.2
  https://launchpad.net/ubuntu/+source/cpio/2.11-7ubuntu3.2