CVE-2023-22795
First published: Thu Jan 26 2023(Updated: )
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.
Credit: support@hackerone.com support@hackerone.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/rails | <=2:5.2.2.1+dfsg-1+deb10u3<=2:5.2.2.1+dfsg-1+deb10u5 | 2:6.0.3.7+dfsg-2+deb11u2 2:6.1.7.3+dfsg-1 2:6.1.7.3+dfsg-2 |
| Rubyonrails Rails | <6.1.7.1 | |
| Rubyonrails Rails | >=7.0.0<7.0.4.1 | |
| Ruby-lang Ruby | <3.2.0 | |
| Debian Debian Linux | =11.0 | |
| redhat/rubygem-actionpack | <6.1.7.1 | 6.1.7.1 |
| redhat/rubygem-actionpack | <7.0.4.1 | 7.0.4.1 |
| All of | ||
| Any of | ||
| Rubyonrails Rails | <6.1.7.1 | |
| Rubyonrails Rails | >=7.0.0<7.0.4.1 | |
| Ruby-lang Ruby | <3.2.0 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://discuss.rubyonrails.org/t/cve-2023-22795-possible-redos-based-dos-vulnerability-in-action-dispatch/82118
- https://github.com/rails/rails/commit/484fc9185db6c6a6a49ab458b11f9366da02bab2
- https://security-tracker.debian.org/tracker/CVE-2023-22795
- https://www.debian.org/security/2023/dsa-5372
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2164802
- https://access.redhat.com/errata/RHSA-2023:6818
- https://bugzilla.redhat.com/show_bug.cgi?id=2164799
- https://security.netapp.com/advisory/ntap-20240202-0010/
Frequently Asked Questions
What is CVE-2023-22795?
CVE-2023-22795 is a regular expression based Denial of Service (DoS) vulnerability in Action Dispatch.
Which versions of Action Dispatch are affected by CVE-2023-22795?
Action Dispatch versions <6.1.7.1 and <7.0.4.1 are affected by CVE-2023-22795.
What is the vulnerability in CVE-2023-22795 related to?
CVE-2023-22795 is related to the If-None-Match header.
How can CVE-2023-22795 be exploited?
CVE-2023-22795 can be exploited by sending a specially crafted HTTP If-None-Match header.
How can I mitigate CVE-2023-22795?
To mitigate CVE-2023-22795, upgrade to a version of Action Dispatch that is not vulnerable (>=6.1.7.1 or >=7.0.4.1).
- collector/security-tracker-debian
- collector/nvd-index
- agent/weakness
- agent/type
- agent/first-publish-date
- agent/softwarecombine
- agent/author
- agent/severity
- agent/remedy
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2023-22795
- agent/software-canonical-lookup
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/references
- agent/tags
- agent/description
- agent/event
- collector/nvd-api
- source/NVD
- package-manager/debian
- vendor/rubyonrails
- canonical/rubyonrails rails
- version/rubyonrails rails/7.0.0
- vendor/ruby-lang
- canonical/ruby-lang ruby
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/11.0
- package-manager/redhat