CVE-2023-22796
Description
A regular expression based DoS vulnerability in Active Support <6.1.7.1 and <7.0.4.1. A specially crafted string passed to the underscore method 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.
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 | activesupport | <~> 5.2.8 | ~> 5.2.8 |
| RubyGems | activesupport | <6.1.7.1 | 6.1.7.1 |
| RubyGems | activesupport | >=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-2023-22796.html
- https://nvd.nist.gov/vuln/detail/CVE-2023-22796
- https://github.com/rails/rails/commit/2164d4f6a1bde74b911fe9ba3c8df1b5bf345bf8
- https://github.com/rails/rails/commit/a7cda7e6aa5334ab41b1f4b0f671be931be946ef
- https://discuss.rubyonrails.org/t/cve-2023-22796-possible-redos-based-dos-vulnerability-in-active-supports-underscore/82116
- 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/activesupport/CVE-2023-22796.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-2023-22796
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.