# CVE-2023-22792: rails: A regular expression based DoS vulnerability in Action Dispatch <6.0.6.1,< 6.1.7.1, and <7.0.4.1

CVE-2023-22792 is fixed in rails on 1 platform, first by DEBIAN-CVE-2023-22792, released February 9, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-22792
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0170
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 9, 2023

## Description

A regular expression based DoS vulnerability in Action Dispatch <6.0.6.1,< 6.1.7.1, and <7.0.4.1. Specially crafted cookies, in combination with a specially crafted X_FORWARDED_HOST header 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 All users running an affected release should either upgrade or use one of the workarounds immediately.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rails Debian 12.15 (bookworm) | 2:6.1.7.3+dfsg-1 | [DEBIAN-CVE-2023-22792](https://patchblox.com/security/data/fix/linux/debian-cve-2023-22792.md) | Feb 9, 2023 |
| Linux | rails Debian 13.5 (trixie) | 2:6.1.7.3+dfsg-1 | [DEBIAN-CVE-2023-22792](https://patchblox.com/security/data/fix/linux/debian-cve-2023-22792.md) | Feb 9, 2023 |
| Linux | rails Debian 14 | 2:6.1.7.3+dfsg-1 | [DEBIAN-CVE-2023-22792](https://patchblox.com/security/data/fix/linux/debian-cve-2023-22792.md) | Feb 9, 2023 |

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