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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0921
                     USN-3913-1: P7ZIP vulnerabilities
                               22 March 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           p7zip
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-17969 CVE-2016-2335 

Reference:         ESB-2018.1054
                   ESB-2018.0350
                   ESB-2018.0349
                   ASB-2016.0056
                   ESB-2016.1450

Original Bulletin: 
   https://usn.ubuntu.com/3913-1/

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USN-3913-1: P7ZIP vulnerabilities

21 March 2019

p7zip vulnerabilities

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

  o 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

  o 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

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.

References

  o CVE-2016-2335
  o CVE-2017-17969

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