CVE-2022-31090
CURLOPT_HTTPAUTH option not cleared on change of origin in Guzzle
In short
Guzzle's Curl handler fails to remove Authorization headers when following redirects to a different website (different host, port, or protocol). This allows sensitive authentication credentials to leak to unintended destinations.
Technical detail
When Guzzle's Curl handler follows HTTP redirects via CURLOPT_HTTPAUTH, the Authorization header is not cleared upon origin change (host, scheme, or port). An attacker controlling a legitimate target server can redirect authenticated requests to a malicious third-party server, exposing credentials. Pre-condition: application must follow redirects and use Curl handler with CURLOPT_HTTPAUTH.
Summary generated and translated by AI from the official description.
Guzzle, an extensible PHP HTTP client. `Authorization` headers on requests are sensitive information. In affected versions when using our Curl handler, it is possible to use the `CURLOPT_HTTPAUTH` option to specify an `Authorization` header. On making a request which responds with a redirect to a URI with a different origin (change in host, scheme or port), if we choose to follow it, we should remove the `CURLOPT_HTTPAUTH` option before continuing, stopping curl from appending the `Authorization` header to the new request. Affected Guzzle 7 users should upgrade to Guzzle 7.4.5 as soon as possible. Affected users using any earlier series of Guzzle should upgrade to Guzzle 6.5.8 or 7.4.5. Note that a partial fix was implemented in Guzzle 7.4.2, where a change in host would trigger removal of the curl-added Authorization header, however this earlier fix did not cover change in scheme or change in port. If you do not require or expect redirects to be followed, one should simply disable redirects all together. Alternatively, one can specify to use the Guzzle steam handler backend, rather than curl.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Affected products
guzzle · guzzleWant to know if your infrastructure is exposed to this?
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