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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.
Base Score
7.5| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| actionpack(RubyGems) | 3.0.0 | 5.2.8.15 | N/A |
| actionpack(RubyGems) | 6.0.0 | 6.1.7.1 | N/A |
| actionpack(RubyGems) | 7.0.0 | 7.0.4.1 | N/A |
| Base Score | 7.5 |
|---|---|
| Vector String | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Base Severity | High |
| Version | 3.1 |
| Attack Vector (AV) | NETWORK |
