Ubuntu Security Notice USN-2788-2
9th November, 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 version:
- 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
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.