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Ubuntu Security Notice USN-2788-1
October 29, 2015

unzip vulnerabilities

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:

unzip could be made to crash or run programs as your login if it opened a
specially crafted file.

Software Description:

• unzip: De-archiver for .zip files

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 6.0-17ubuntu1.1

Ubuntu 15.04:
unzip 6.0-13ubuntu3.1

Ubuntu 14.04 LTS:
unzip 6.0-9ubuntu1.4

Ubuntu 12.04 LTS:
unzip 6.0-4ubuntu2.4

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

References:
http://www.ubuntu.com/usn/usn-2788-1
CVE-2015-7696, CVE-2015-7697

Package Information:
https://launchpad.net/ubuntu/+source/unzip/6.0-17ubuntu1.1
https://launchpad.net/ubuntu/+source/unzip/6.0-13ubuntu3.1
https://launchpad.net/ubuntu/+source/unzip/6.0-9ubuntu1.4
https://launchpad.net/ubuntu/+source/unzip/6.0-4ubuntu2.4

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