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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 2:6.1.7.3+dfsg-1 |
| sid | Fixed | 2:6.1.7.3+dfsg-1 |
| forky | Fixed | 2:6.1.7.3+dfsg-1 |
| bullseye | Fixed | 2:6.0.3.7+dfsg-2+deb11u1 |
| bookworm | Fixed | 2:6.1.7.3+dfsg-1 |
Rocky Linux Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 8 | Fixed | — |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| RubyGems | actionpack | <~> 5.2.8 | ~> 5.2.8 |
| RubyGems | actionpack | >=4.0.0.beta1,<6.1.7.1 | 6.1.7.1 |
| RubyGems | actionpack | >=7.0.0,<7.0.4.1 | 7.0.4.1 |
References
- https://github.com/rails/rails/releases/tag/v7.0.4.1
- https://errata.rockylinux.org/RLSA-2023:6818
- https://www.suse.com/security/cve/CVE-2023-22795.html
- https://nvd.nist.gov/vuln/detail/CVE-2023-22795
- https://github.com/rails/rails/commit/8d82687f3b04b2803320b64f985308239a8c3d2f
- https://github.com/rails/rails/commit/8dc45950619a4c64d16fb9370570c996d201f9b0
- https://github.com/rails/rails/commit/cd461c3e64e09cdcb1e379d1c35423c5e2caa592
- https://discuss.rubyonrails.org/t/cve-2023-22795-possible-redos-based-dos-vulnerability-in-action-dispatch/82118
- https://github.com/rails/rails
- https://github.com/rails/rails/releases/tag/v6.1.7.1
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2023-22795.yml
- https://rubyonrails.org/2023/1/17/Rails-Versions-6-0-6-1-6-1-7-1-7-0-4-1-have-been-released
- https://security-tracker.debian.org/tracker/CVE-2023-22795
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.