USN-2788-2: unzip regression

Releases

• Ubuntu 15.10
• Ubuntu 15.04
• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

• 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

• unzip - 6.0-9ubuntu1.5

Ubuntu 12.04

• unzip - 6.0-4ubuntu2.5

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

References

• https://launchpad.net/bugs/1513293