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Code Issues Releases Wiki Activity

Fileserver: Check for valid file paths

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jeremy@jermolene.com 2021-08-28 13:16:54 +01:00
parent 124b49456a
commit a67b1b8bb5
1 changed files with 21 additions and 14 deletions
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35
core/modules/server/routes/get-file.js
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@ -21,21 +21,28 @@ exports.handler = function(request,response,state) {
fs = require("fs"),
util = require("util"),
suppliedFilename = decodeURIComponent(state.params[0]),
filename = path.resolve(state.boot.wikiPath,"files",suppliedFilename),
baseFilename = path.resolve(state.boot.wikiPath,"files"),
filename = path.resolve(baseFilename,suppliedFilename),
extension = path.extname(filename);
fs.readFile(filename,function(err,content) {
var status,content,type = "text/plain";
if(err) {
console.log("Error accessing file " + filename + ": " + err.toString());
status = 404;
content = "File '" + suppliedFilename + "' not found";
} else {
status = 200;
content = content;
type = ($tw.config.fileExtensionInfo[extension] ? $tw.config.fileExtensionInfo[extension].type : "application/octet-stream");
}
state.sendResponse(status,{"Content-Type": type},content);
});
// Check that the filename is inside the wiki files folder
if(path.relative(baseFilename,filename).indexOf("..") !== 0) {
// Send the file
fs.readFile(filename,function(err,content) {
var status,content,type = "text/plain";
if(err) {
console.log("Error accessing file " + filename + ": " + err.toString());
status = 404;
content = "File '" + suppliedFilename + "' not found";
} else {
status = 200;
content = content;
type = ($tw.config.fileExtensionInfo[extension] ? $tw.config.fileExtensionInfo[extension].type : "application/octet-stream");
}
state.sendResponse(status,{"Content-Type": type},content);
});
} else {
state.sendResponse(404,{"Content-Type": "text/plain"},"File '" + suppliedFilename + "' not found");
}
};
}());