USN-2788-2: unzip regression | Ubuntu security notices

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)

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

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

Learn more about how to get the fixes.

Ubuntu Release	Package Version
15.10 wily	unzip – 6.0-17ubuntu1.2
15.04 vivid	unzip – 6.0-13ubuntu3.2
14.04 trusty	unzip – 6.0-9ubuntu1.5
12.04 precise	unzip – 6.0-4ubuntu2.5

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References

https://launchpad.net/bugs/1513293