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Bug #14052
closed
Bridge interface is not properly validated when submitted on ``interfaces_bridge_edit.php``
Start date:
Due date:
% Done:
100%
Estimated time:
Plus Target Version:
23.05
Release Notes:
Default
Affected Version:
Affected Architecture:
Description
When creating or editing a bridge interface on interfaces_bridge_edit.php, the submitted $_POST['bridgeif'] is used in interface_bridge_configure() before it is validated. Subsequently, that function calls others which in turn use the submitted interface name in shell commands.
Due to a lack of escaping on commands in the functions being called, it is possible to execute arbitrary commands with a properly formatted submission value for $_POST['bridgeif'] such as "; touch somefile; #".
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