CVE-2023-22795
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.
- CVSS 3.1
- 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 2.3% chance of exploitation in the next 30 days; higher than 82% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-1333, CWE-400
- Published
- Modified
- Record from
- the NVD, synced
Affected
- debian:debian_linux
- rubyonrails:rails
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-8xww-x3g3-6jcv | RubyGems | actionpack | >=4.0.0.beta1 <6.1.7.1 | 6.1.7.1 |
| GHSA-8xww-x3g3-6jcv | RubyGems | actionpack | >=7.0.0 <7.0.4.1 | 7.0.4.1 |
References
- https://discuss.rubyonrails.org/t/cve-2023-22795-possible-redos-based-dos-vulnerability-in-action-dispatch/82118
- https://security.netapp.com/advisory/ntap-20240202-0010/
- https://www.debian.org/security/2023/dsa-5372
- https://discuss.rubyonrails.org/t/cve-2023-22795-possible-redos-based-dos-vulnerability-in-action-dispatch/82118
- https://security.netapp.com/advisory/ntap-20240202-0010/