Ubuntu 15.10 USN-2788-2 Moderate: Fix for Unzip Regression Issue

ubuntu

November 9, 2015

USN-2788-1 introduced a regression in unzip.

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)

Topics Covered

security advisory denial of service arbitrary code execution unzip ubuntu regression

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.