Ubuntu 20.10, 20.04 LTS, 16.04 LTS: USN-4561-2 Moderate: Rack Info Leak

ubuntu

April 6, 2021

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

Summary

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

Software Description:

- ruby-rack: modular Ruby webserver interface

Details:

USN-4561-1 fixed vulnerabilities in Rack. This update provides the

corresponding update for Ubuntu 16.04 LTS, Ubuntu 20.04 LTS and Ubuntu 20.10.

Original advisory details:

It was discovered that Rack incorrectly handled certain paths. An attacker

could possibly use this issue to obtain sensitive information. This issue

only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.

(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)

Topics Covered

security advisory moderate info leak ubuntu ruby-rack

Update Instructions

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

Ubuntu 20.10:
  ruby-rack                       2.1.1-5ubuntu0.1

Ubuntu 20.04 LTS:
  ruby-rack                       2.0.7-2ubuntu0.1

Ubuntu 16.04 LTS:
  ruby-rack                       1.6.4-3ubuntu0.2

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