CVE-2023-22795
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Rails
PublishedFeb 9, 2023
First seenFeb 9, 2023
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- rubyonrails rails6.1.7.1, 7.0.4.1 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| rubyonrails rails | v < 6.1.7.1, 7.0.0 ≤ v < 7.0.4.1 | 6.1.7.1, 7.0.4.1 |
| debian debian_linux | 11.0 | — |
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