php7.x: Execute Arbitrary Code/Commands -- Remote/Unauthenticated

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.3984
                       USN-4166-1: PHP vulnerability
                              29 October 2019

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

Product:           php 7.0
                   php7.2
                   php7.3
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-11043  

Reference:         ESB-2019.3963

Original Bulletin: 
   https://usn.ubuntu.com/4166-1/

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USN-4166-1: PHP vulnerability
28 October 2019

php7.0, php7.2, php7.3 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 19.10
  o Ubuntu 19.04
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS

Summary

PHP could be made to run programs if it received specially crafted network
traffic.

Software Description

  o php7.3 - HTML-embedded scripting language interpreter
  o php7.2 - HTML-embedded scripting language interpreter
  o php7.0 - HTML-embedded scripting language interpreter

Details

It was discovered that PHP incorrectly handled certain paths when being used in
FastCGI configurations. A remote attacker could possibly use this issue to
execute arbitrary code.

Update instructions

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

Ubuntu 19.10
    libapache2-mod-php7.3 - 7.3.11-0ubuntu0.19.10.1
    php7.3-cgi - 7.3.11-0ubuntu0.19.10.1
    php7.3-cli - 7.3.11-0ubuntu0.19.10.1
    php7.3-fpm - 7.3.11-0ubuntu0.19.10.1
Ubuntu 19.04
    libapache2-mod-php7.2 - 7.2.24-0ubuntu0.19.04.1
    php7.2-cgi - 7.2.24-0ubuntu0.19.04.1
    php7.2-cli - 7.2.24-0ubuntu0.19.04.1
    php7.2-fpm - 7.2.24-0ubuntu0.19.04.1
Ubuntu 18.04 LTS
    libapache2-mod-php7.2 - 7.2.24-0ubuntu0.18.04.1
    php7.2-cgi - 7.2.24-0ubuntu0.18.04.1
    php7.2-cli - 7.2.24-0ubuntu0.18.04.1
    php7.2-fpm - 7.2.24-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
    libapache2-mod-php7.0 - 7.0.33-0ubuntu0.16.04.7
    php7.0-cgi - 7.0.33-0ubuntu0.16.04.7
    php7.0-cli - 7.0.33-0ubuntu0.16.04.7
    php7.0-fpm - 7.0.33-0ubuntu0.16.04.7

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-2019-11043

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