CVE-2023-22795

Description

A regular expression based DoS vulnerability in Action Dispatch <6.1.7.1 and <7.0.4.1 related to the If-None-Match header. A specially crafted HTTP If-None-Match header can cause the regular expression engine to enter a state of catastrophic backtracking, when on a version of Ruby below 3.2.0. This can cause the process to use large amounts of CPU and memory, leading to a possible DoS vulnerability All users running an affected release should either upgrade or use one of the workarounds immediately.

Affected packages (2)

• Debian/railsfrom 0, < 2:6.0.3.7+dfsg-2+deb11u1
• RubyGems/actionpack>= 4.0.0.beta1, < 6.1.7.1

CVSS scores

References (11)

• ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2023-22795
• ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2023-22795
• PATCHhttps://github.com/rails/rails
• WEBhttps://discuss.rubyonrails.org/t/cve-2023-22795-possible-redos-based-dos-vulnerability-in-action-dispatch/82118
• WEBhttps://github.com/rails/rails/commit/8d82687f3b04b2803320b64f985308239a8c3d2f
• WEBhttps://github.com/rails/rails/commit/8dc45950619a4c64d16fb9370570c996d201f9b0
• WEBhttps://github.com/rails/rails/commit/cd461c3e64e09cdcb1e379d1c35423c5e2caa592
• WEBhttps://github.com/rails/rails/releases/tag/v6.1.7.1
• WEBhttps://github.com/rails/rails/releases/tag/v7.0.4.1
• WEBhttps://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2023-22795.yml
• WEBhttps://rubyonrails.org/2023/1/17/Rails-Versions-6-0-6-1-6-1-7-1-7-0-4-1-have-been-released