ESB-2020.3414 – [Ubuntu] Rack: Access confidential data – Remote/unauthenticated

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.3414
                     USN-4561-1: Rack vulnerabilities
                              1 October 2020

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

Product:           Rack
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-8184 CVE-2020-8161 

Reference:         ESB-2020.2359
                   ESB-2020.1836

Original Bulletin: 
   https://usn.ubuntu.com/4561-1/

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USN-4561-1: Rack vulnerabilities
30 September 2020

Rack could be made to expose sensitive information over the network.
Releases

  o Ubuntu 18.04 LTS

Packages

  o ruby-rack - modular Ruby webserver interface

Details

It was discovered that Rack incorrectly handled certain paths. An attacker
could possibly use this issue to obtain sensitive information.
(CVE-2020-8161)

It was discovered that Rack incorrectly validated cookies. An attacker
could possibly use this issue to forge a secure cookie. (CVE-2020-8184)

Update instructions

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

Ubuntu 18.04

  o ruby-rack - 1.6.4-4ubuntu0.2

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

References

  o CVE-2020-8161
  o CVE-2020-8184

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