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.
2023-02-09T20:15:11.420
2024-11-21T07:45:26.440
Modified
CVSSv3.1: 7.5 (HIGH)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | rubyonrails | rails | < 6.1.7.1 | Yes |
| Application | rubyonrails | rails | < 7.0.4.1 | Yes |
| Application | ruby-lang | ruby | < 3.2.0 | No |
| Operating System | debian | debian_linux | 11.0 | Yes |