USN-3913-1: P7ZIP vulnerabilities

21 March 2019

p7zip vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 16.04 LTS


p7zip could be made to crash or run programs as your login if it opened a specially crafted file.

Software Description

  • p7zip - 7z file archiver with high compression ratio


It was discovered that p7zip did not correctly handle certain malformed archives. If a user or automated system were tricked into processing a specially crafted archive with p7zip, then p7zip could be made to crash, possibly leading to abitrary code execution.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.04 LTS
p7zip - 9.20.1~dfsg.1-4.2ubuntu0.1
p7zip-full - 9.20.1~dfsg.1-4.2ubuntu0.1

To update your system, please follow these instructions:

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