A ruby-rack security update has been released for Debian GNU/Linux 9 LTS to address a directory traversal vulnerability and cookies issue.

DLA 2275-1: ruby-rack security update

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Debian LTS Advisory DLA-2275-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
July 10, 2020   https://wiki.debian.org/LTS
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Package : ruby-rack
Version : 1.6.4-4+deb9u2
CVE ID : CVE-2020-8161 CVE-2020-8184
Debian Bug : 963477

The following CVEs were reported against src:ruby-rack.

CVE-2020-8161

A directory traversal vulnerability exists in rack < 2.2.0 that
allows an attacker perform directory traversal vulnerability in
the Rack::Directory app that is bundled with Rack which could
result in information disclosure.

CVE-2020-8184

A reliance on cookies without validation/integrity check security
vulnerability exists in rack < 2.2.3, rack < 2.1.4 that makes it
is possible for an attacker to forge a secure or host-only cookie
prefix.

For Debian 9 stretch, these problems have been fixed in version
1.6.4-4+deb9u2.

We recommend that you upgrade your ruby-rack packages.

For the detailed security status of ruby-rack please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/ruby-rack

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS