curl might erroneously pass on credentials for a first proxy to a second proxy.
This can happen when the following conditions are true:
- curl is setup to use specific different proxies for different URL schemes
- the first proxy needs credentials
- the second proxy uses no credentials
- while using the first proxy (using say
http://), curl is asked to follow a redirect to a URL using another scheme (sayhttps://), accessed using a second, different, proxy
Weakness
The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Curl | Haxx | 7.14.1 (including) | 8.20.0 (excluding) |
| Red Hat Hardened Images | RedHat | curl-main-8.20.0-0.1.hum1 | * |
| Curl | Ubuntu | devel | * |
| Curl | Ubuntu | esm-infra-legacy/trusty | * |
| Curl | Ubuntu | esm-infra-legacy/xenial | * |
| Curl | Ubuntu | esm-infra/bionic | * |
| Curl | Ubuntu | esm-infra/focal | * |
| Curl | Ubuntu | esm-infra/xenial | * |
| Curl | Ubuntu | jammy | * |
| Curl | Ubuntu | noble | * |
| Curl | Ubuntu | questing | * |
| Curl | Ubuntu | resolute | * |
| Curl | Ubuntu | upstream | * |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/102.html
- https://cwe.mitre.org/data/definitions/474.html
- https://cwe.mitre.org/data/definitions/50.html
- https://cwe.mitre.org/data/definitions/509.html
- https://cwe.mitre.org/data/definitions/551.html
- https://cwe.mitre.org/data/definitions/555.html
- https://cwe.mitre.org/data/definitions/560.html
- https://cwe.mitre.org/data/definitions/561.html
- https://cwe.mitre.org/data/definitions/600.html
- https://cwe.mitre.org/data/definitions/644.html
- https://cwe.mitre.org/data/definitions/645.html
- https://cwe.mitre.org/data/definitions/652.html
- https://cwe.mitre.org/data/definitions/653.html