unzip regression

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)