CrowdSec offers crowdsourced protection against malicious IPs. From 1.5.0 until 1.7.8, pkg/appsec/request.go NewParsedRequestFromRequest allocated a request body buffer from max(r.ContentLength, 0), so HTTP/1.1 requests using Transfer-Encoding: chunked and HTTP/2 requests without a content-length header produced an empty body and caused WAF rules targeting REQUEST_BODY, BODY_ARGS, ARGS_POST, JSON, or XML to be skipped. This issue is fixed in version 1.7.8.
Weakness
The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/1.html
- https://cwe.mitre.org/data/definitions/107.html
- https://cwe.mitre.org/data/definitions/127.html
- https://cwe.mitre.org/data/definitions/17.html
- https://cwe.mitre.org/data/definitions/20.html
- https://cwe.mitre.org/data/definitions/22.html
- https://cwe.mitre.org/data/definitions/237.html
- https://cwe.mitre.org/data/definitions/36.html
- https://cwe.mitre.org/data/definitions/477.html
- https://cwe.mitre.org/data/definitions/480.html
- https://cwe.mitre.org/data/definitions/51.html
- https://cwe.mitre.org/data/definitions/57.html
- https://cwe.mitre.org/data/definitions/59.html
- https://cwe.mitre.org/data/definitions/65.html
- https://cwe.mitre.org/data/definitions/668.html
- https://cwe.mitre.org/data/definitions/74.html
- https://cwe.mitre.org/data/definitions/87.html
References
- https://github.com/crowdsecurity/crowdsec/commit/3d5c4d9b127091e9063b9b5eb785372a599a4435
- https://github.com/crowdsecurity/crowdsec/commit/57a793548671e6bbd2cde5562fe87b856ec9c642
- https://github.com/crowdsecurity/crowdsec/pull/4355
- https://github.com/crowdsecurity/crowdsec/releases/tag/v1.7.8
- https://github.com/crowdsecurity/crowdsec/security/advisories/GHSA-rw47-hm26-6wr7