CVE-2023-40586 – github.com/corazawaf/coraza/v3

Package

Manager: go
Name: github.com/corazawaf/coraza/v3
Vulnerable Version: >=3.0.0 <3.0.1

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS: 0.0023 pctl0.45736

Details

Coraza has potential denial of service vulnerability ### Summary Due to the misuse of `log.Fatalf`, the application using coraza crashed after receiving crafted requests from attackers. ### Details https://github.com/corazawaf/coraza/blob/82157f85f24c6107667bf0f686b71a72aafdf8a5/internal/bodyprocessors/multipart.go#L26-L29 The bodyprocessors of multipart uses `log.Fatalf` to handle errors from the `mime.ParseMediaType`, but `log.Fatalf` calls `os.Exit` directly after logging the error. https://github.com/golang/go/blob/a031f4ef83edc132d5f49382bfef491161de2476/src/log/log.go#L288-L291 This means that the application will immediately crash after receiving a malicious request that triggers an error in `mime.ParseMediaType`. ### PoC The server can be demonstrated by https://github.com/corazawaf/coraza/tree/main/examples/http-server After sending this request ``` POST / HTTP/1.1 Host: 127.0.0.1:8090 User-Agent: curl/8.1.2 Accept: */* Content-Length: 199 Content-Type: multipart/form-data; boundary=------------------------5fa6351b877326a1; a=1; a=2 Connection: close --------------------------5fa6351b877326a1 Content-Disposition: form-data; name="file"; filename="123" Content-Type: application/octet-stream 123 --------------------------5fa6351b877326a1-- ``` The server will crash immediately. The `a=1; a=2` in `Content-Type` makes `mime: duplicate parameter name` error. ### Impact I believe the vulnerability was introduced by the following commit: https://github.com/corazawaf/coraza/commit/24af0c8cf4f10bab558740b595712be3b85493ec. ### Mitigation The error from `mime.ParseMediaType` should return directly.

Metadata

Created: 2023-06-26T15:48:33Z
Modified: 2023-08-25T21:35:14Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/06/GHSA-c2pj-v37r-2p6h/GHSA-c2pj-v37r-2p6h.json
CWE IDs: ["CWE-400"]
Alternative ID: GHSA-c2pj-v37r-2p6h
Finding: F002
Auto approve: 1