Guzzle: Silent HTTPS-Proxy Downgrade to Cleartext
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| guzzle | guzzle | affected |
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No data.
| Vendor | Product | Versions | ||||||||
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| Guzzlephp | Guzzle |
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| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-wpwq-4j6v-78m3 | guzzlehttp/guzzle: Silent HTTPS-Proxy Downgrade to Cleartext |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.148% probability within 30 days)
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Guzzlephp
Guzzlephp guzzle |
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| Vendors & Products |
Guzzlephp
Guzzlephp guzzle |
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| Description | Guzzle is an extensible PHP HTTP client. Prior to 7.12.1, in certain configurations, traffic expected to be protected by TLS on the hop to the proxy is transmitted in cleartext. Proxy authentication credentials (the Proxy-Authorization header, proxy userinfo in the proxy URL, or CURLOPT_PROXYUSERPWD) are sent without encryption, and the CONNECT target host and port for tunneled HTTPS requests are exposed. The built-in cURL handlers (GuzzleHttp\Handler\CurlHandler and GuzzleHttp\Handler\CurlMultiHandler, used by default whenever the PHP cURL extension is available) accept an https:// proxy. libcurl older than 7.50.2 silently treats an https:// proxy as a plaintext http:// proxy. The TLS connection to the proxy is never established, and the proxy leg is cleartext with no error or warning. An application is affected when it sends requests through one of the built-in cURL handlers, configures an https:// proxy expecting the proxy connection itself to be encrypted, and runs with libcurl older than 7.50.2. This vulnerability is fixed in 7.12.1. | |
| Title | Guzzle: Silent HTTPS-Proxy Downgrade to Cleartext | |
| Weaknesses | CWE-311 CWE-319 CWE-636 |
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| References |
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| Metrics |
cvssV3_1
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