ESB-2019.1182 - [Ubuntu] Lua: Denial of service - Remote with user interaction 2019-04-09

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.1182
                       USN-3941-1: Lua vulnerability
                               9 April 2019

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

Product:           Lua
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Denial of Service -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-6706  

Reference:         ESB-2019.0376

Original Bulletin: 
   https://usn.ubuntu.com/3941-1/

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

  o Ubuntu 18.10
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS

Summary

Lua could be made to crash if it received a specially crafted script.

Software Description

  o lua5.3 - Simple, extensible, embeddable programming language

Details

Fady Othman discovered that Lua incorrectly handled certain scripts. An
attacker could possibly use this issue to cause a denial of service.

Update instructions

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

Ubuntu 18.10
    lua5.3 - 5.3.3-1ubuntu0.18.10.1
Ubuntu 18.04 LTS
    lua5.3 - 5.3.3-1ubuntu0.18.04.1
Ubuntu 16.04 LTS
    lua5.3 - 5.3.1-1ubuntu2.1

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-2019-6706

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