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Merge pull request #43403 from ClickHouse/table-function-add-comment

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Alexey Milovidov 2022-11-21 15:06:20 +01:00 committed by GitHub
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src/TableFunctions/ITableFunction.h
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@ -86,6 +86,16 @@ private:
struct TableFunctionProperties struct TableFunctionProperties
{ {
Documentation documentation; Documentation documentation;
/** It is determined by the possibility of modifying any data or making requests to arbitrary hostnames.
*
* If users can make a request to an arbitrary hostname, they can get the info from the internal network
* or manipulate internal APIs (say - put some data into Memcached, which is available only in the corporate network).
* This is named "SSRF attack".
* Or a user can use an open ClickHouse server to amplify DoS attacks.
*
* In those cases, the table function should not be allowed in readonly mode.
*/
bool allow_readonly = false; bool allow_readonly = false;
}; };