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| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| silverstripe/framework | composer | >= 4.0.0, < 4.4.7 | 4.4.7 |
| silverstripe/framework | composer | >= 4.5.0, < 4.5.4 | 4.5.4 |
| silverstripe/framework | composer | >= 3.0.0, < 3.7.5 | 3.7.5 |
The vulnerability stems from three attack vectors: 1) _method POST parameter handling, 2) X-HTTP-Method-Override header, and 3) X-Original-Url header. The patch removes these features. The detect_method() function explicitly handled method override logic through POST parameters, while cleanEnvironment() processed the dangerous headers. Both functions created inconsistencies between actual requests and their interpreted versions, enabling cache poisoning through smuggled HTTP methods and URLs.
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