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: RubyGems: actionpack
There is a possible regular expression based DoS vulnerability in Action Dispatch related to the If-None-Match header. This vulnerability has been assigned the CVE identifier CVE-2023-22795.
Versions Affected: All Not affected: None Fixed Versions: 5.2.8.15 (Rails LTS), 6.1.7.1, 7.0.4.1
Impact
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. Releases
The FIXED releases are available at the normal locations. Workarounds
We recommend that all users upgrade to one of the FIXED versions. In the meantime, users can mitigate this vulnerability by using a load balancer or other device to filter out malicious If-None-Match headers before they reach the application.
Users on Ruby 3.2.0 or greater are not affected by this vulnerability. Patches
To aid users who aren’t able to upgrade immediately we have provided patches for the two supported release series. They are in git-am format and consist of a single changeset.
6-1-Avoid-regex-backtracking-on-If-None-Match-header.patch - Patch for 6.1 series 7-0-Avoid-regex-backtracking-on-If-None-Match-header.patch - Patch for 7.0 series
Please note that only the 7.0.Z and 6.1.Z series are supported a…
Affected: openEuler:20.03-LTS-SP1: rubygem-actionpack, openEuler:20.03-LTS-SP4: rubygem-actionpack, openEuler:22.03-LTS: rubygem-actionpack, openEuler:22.03-LTS-SP1: rubygem-actionpack, openEuler:22.03-LTS-SP2: rubygem-actionpack, openEuler:22.03-LTS-SP3: rubygem-actionpack
Eases web-request routing, handling, and response as a half-way front, half-way page controller. Implemented with specific emphasis on enabling easy unit/integration testing that doesn't require a browser. Security Fix(es): A regular expression based DoS vulnerability in Action Dispatch <6.0.6.1,< 6.1.7.1, and <7.0.4.1. Specially crafted cookies, in combination with a specially crafted X_FORWARDED_HOST header can cause the regular expression engine to enter a state of catastrophic backtracking. 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.(CVE-2023-22792) 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.(CVE-2023-22795)
ruby3.1-rubygem-actionpack-7.0-7.0.4.1-1.1 on GA media
kubeclient: kubeconfig parsing error can lead to MITM attacks openssl: c_rehash script allows command injection openssl: the c_rehash script allows command injection Pulp: Tokens stored in plaintext foreman: OS command injection via ct_command and fcct_command satellite: Blind SSRF via Referer header python-future: remote attackers can cause denial of service via crafted Set-Cookie header from malicious web server golang: net/http: excessive memory growth in a Go server accepting HTTP/2 requests rubygem-activerecord: Denial of Service rubygem-rack: denial of service in Content-Disposition parsing rubygem-rack: denial of service in Content-Disposition parsing rubygem-rack: denial of service in Content-Disposition parsing ruby-git: code injection vulnerability ruby-git: code injection vulnerability Foreman: Arbitrary code execution through templates Foreman: Stored cross-site scripting in host tab puppet: Puppet Server ReDoS rubygem-actionpack: Denial of Service in Action Dispatch rubygem-activerecord: SQL Injection rubygem-actionpack: Denial of Service in Action Dispatch rubygem-activesupport: Regular Expression Denial of Service rubygem-globalid: ReDoS vulnerability rubygem-rack: Denial of service in Multipart MIME parsing rubygem-rack: denial of service in header parsing golang: net/http: insufficient sanitization of Host header sqlparse: Parser contains a regular expression that is vulnerable to ReDOS (Regular Expression Denial of Service) python-django: Potential bypass o…
Security update for rubygem-actionpack-4_2
Affected: Ubuntu:Pro:16.04:LTS: rails, Ubuntu:Pro:18.04:LTS: rails, Ubuntu:Pro:20.04:LTS: rails, Ubuntu:Pro:22.04:LTS: rails, Ubuntu:24.04:LTS: rails, Ubuntu:25.10: rails, Ubuntu:26.04:LTS: rails
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.
Ein entfernter Angreifer kann mehrere Schwachstellen in Ruby on Rails ausnutzen, um einen Denial of Service Angriff durchzuführen, Daten zu manipulieren und Sicherheitsmaßnahmen zu umgehen.