GHSA-5f5v-5c3v-gw5v Silverstripe IE requests not properly behaving with rewritehashlinks

• Packagist silverstripe/framework: < 3.0.13 → fixed in 3.0.13 • Packagist silverstripe/framework: >= 3.1.0, < 3.1.12 → fixed in 3.1.12

Non IE browsers don’t appear to be affected, but I haven’t tested a wide range of browsers to be sure Requests that come through from IE do NOT appear to encode all entities in the URL string, meaning they are inserted into output content directly by SSViewer::process() when rewriting hashlinks, as it directly outputs $_SERVER[‘REQUEST_URI’] Example IE8 request 127.0.0.1 - - [18/Jun/2014:14:13:42 +1000] “GET /site/cars/brands/toyota?one=1\”onmouseover=\”alert(‘things’);\” HTTP/1.1” 200 Example FF request 127.0.0.1 - - [18/Jun/2014:14:14:22 +1000] “GET /site/cars/brands/toyota?one=1\%22onmouseover=\%22alert(%27things%27);\%22 HTTP/1.1” 200 This causes any hash anchor to have the JS code inserted into the page as-is.