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Ubuntu Security Notice USN-3913-1
March 21, 2019

p7zip vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

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

Details:

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

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

References:
  https://usn.ubuntu.com/usn/usn-3913-1
  CVE-2016-2335, CVE-2017-17969

Package Information:
  https://launchpad.net/ubuntu/+source/p7zip/9.20.1~dfsg.1-4.2ubuntu0.1