CVE-2020-8184
rubygem-rack: percent-encoded cookies can be used to overwrite existing prefixed cookie names
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · June 15, 2020
Updated · June 27, 2026
Description
A flaw was found in rubygem-rack. An attacker may be able to trick a vulnerable application into processing an insecure (non-SSL) or cross-origin request if they can gain the ability to write arbitrary cookies that are sent to the application. The highest threat from this vulnerability is to data integrity.
Statement
Because Red Hat OpenStack Platform 13.0 Operational Tools packages ships the flawed code, but does not use its functionality, its Impact has been reduced to 'Low'.
Red Hat Satellite 6 and Red Hat CloudForms ship affected RubyGem Rack, however, since overwriting cookies is not possible products are not vulnerable to the flaw. We may update the Rack dependency in a future releases.
Red Hat Gluster Storage 3 ships RubyGem Rack, but the version shipped does not contain the affected code. Therefore, it is impossible to overwrite cookies using this particular flaw.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE-807 · Reliance on Untrusted Inputs in a Security Decision