PT-2023-18701 · Ruby On Rails+4 · Action Dispatch+4
Wonda_Tea_Coffee
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Publicado
2023-01-18
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Atualizado
2025-09-29
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CVE-2023-22795
CVSS v2.0
7.8
Alta
| Vetor | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
Action Dispatch versions prior to 6.1.7.1
Action Dispatch versions prior to 7.0.4.1
Description
The issue is related to insufficient input validation in the Action Dispatch component of Ruby on Rails, which can lead to a denial of service (DoS) vulnerability. A specially crafted HTTP
If-None-Match header can cause the regular expression engine to enter a state of catastrophic backtracking when using a version of Ruby below 3.2.0, leading to high CPU and memory usage. This can result in a possible DoS vulnerability. Users running affected releases should upgrade or use one of the workarounds immediately.Recommendations
For Action Dispatch versions prior to 6.1.7.1, upgrade to version 6.1.7.1 or apply the patch
6-1-Avoid-regex-backtracking-on-If-None-Match-header.patch.
For Action Dispatch versions prior to 7.0.4.1, upgrade to version 7.0.4.1 or apply the patch 7-0-Avoid-regex-backtracking-on-If-None-Match-header.patch.
As a temporary workaround, consider using a load balancer or other device to filter out malicious If-None-Match headers before they reach the application.Exploit
Correção
DoS
RCE
Resource Exhaustion
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Identificadores relacionados
Produtos afetados
Alt Linux
Action Dispatch
Red Os
Rocky Linux
Suse