Staging Environment: Content and features may be unstable or change without notice.
Advisory details: ruby_advisory_db / gems/actionpack/CVE-2023-22795
Advisory ID ruby_advisory_db/gems/actionpack/CVE-2023-22795
Aliases CVE-2023-22795
GHSA-8xww-x3g3-6jcv
Summary ReDoS based DoS vulnerability in Action Dispatch 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: 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. # 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.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (0)
There are no known CWE.
System Score Found at
There are no known severity scores.
Reference id Reference type URL
https://github.com/rails/rails/releases/tag/v7.0.4.1

No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.

There are no known vectors.

There are no SSVC decisions available.