Successfully using libcurl to do a transfer over a specific HTTP proxy
(proxyA) with Digest authentication and then changing the proxy host to
a second one (proxyB) for a second transfer, reusing the same handle, makes
libcurl wrongly pass on the Proxy-Authorization: header field meant for
proxyA, to proxyB.
Weakness
A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes).
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Curl | Haxx | 7.12.0 (including) | 8.20.0 (excluding) |
| Red Hat Hardened Images | RedHat | curl-main-8.20.0-2.hum1 | * |
| Curl | Ubuntu | devel | * |
| Curl | Ubuntu | esm-infra/xenial | * |
| Curl | Ubuntu | jammy | * |
| Curl | Ubuntu | noble | * |
| Curl | Ubuntu | questing | * |
| Curl | Ubuntu | resolute | * |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/102.html
- https://cwe.mitre.org/data/definitions/509.html
- https://cwe.mitre.org/data/definitions/555.html
- https://cwe.mitre.org/data/definitions/561.html
- https://cwe.mitre.org/data/definitions/60.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/701.html
- https://cwe.mitre.org/data/definitions/94.html