ruby-rack: Cross-site Scripting -- Remote with User Interaction

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.3036
                      USN-4089-1: Rack vulnerability
                               9 August 2019

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

Product:           ruby-rack
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Cross-site Scripting -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-16471  

Reference:         ESB-2019.2042
                   ESB-2018.3630

Original Bulletin: 
   https://usn.ubuntu.com/4089-1/

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USN-4089-1: Rack vulnerability
7 August 2019

ruby-rack vulnerability

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

  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS

Summary

Rack could allow cross-site scripting (XSS) attacks.

Software Description

  o ruby-rack - modular Ruby webserver interface

Details

It was discovered that Rack incorrectly handled carefully crafted requests. A
remote attacker could use this issue to execute a cross-site scripting (XSS)
attack.

Update instructions

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

Ubuntu 18.04 LTS
    ruby-rack - 1.6.4-4ubuntu0.1
Ubuntu 16.04 LTS
    ruby-rack - 1.6.4-3ubuntu0.1

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-2018-16471

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