[USN-2788-2] unzip regression

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==========================================================================
Ubuntu Security Notice USN-2788-2
November 09, 2015

unzip regression
==========================================================================

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

- Ubuntu 15.10
- Ubuntu 15.04
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

USN-2788-1 introduced a regression in unzip.

Software Description:
- unzip: De-archiver for .zip files

Details:

USN-2788-1 fixed vulnerabilities in unzip. One of the security patches
caused a regression when extracting 0-byte files. This update fixes the
problem.

We apologize for the inconvenience.

Original advisory details:

Gustavo Grieco discovered that unzip incorrectly handled certain password
protected archives. If a user or automated system were tricked into
processing a specially crafted zip archive, an attacker could possibly
execute arbitrary code. (CVE-2015-7696)
Gustavo Grieco discovered that unzip incorrectly handled certain malformed
archives. If a user or automated system were tricked into processing a
specially crafted zip archive, an attacker could possibly cause unzip to
hang, resulting in a denial of service. (CVE-2015-7697)

Update instructions:

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

Ubuntu 15.10:
unzip 6.0-17ubuntu1.2

Ubuntu 15.04:
unzip 6.0-13ubuntu3.2

Ubuntu 14.04 LTS:
unzip 6.0-9ubuntu1.5

Ubuntu 12.04 LTS:
unzip 6.0-4ubuntu2.5

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

References:
http://www.ubuntu.com/usn/usn-2788-2
http://www.ubuntu.com/usn/usn-2788-1
https://launchpad.net/bugs/1513293

Package Information:
https://launchpad.net/ubuntu/+source/unzip/6.0-17ubuntu1.2
https://launchpad.net/ubuntu/+source/unzip/6.0-13ubuntu3.2
https://launchpad.net/ubuntu/+source/unzip/6.0-9ubuntu1.5
https://launchpad.net/ubuntu/+source/unzip/6.0-4ubuntu2.5