čt 5. 6. 2025 v 12:49 odesílatel Peter Eisentraut <peter@eisentraut.org> napsal:
On 23.05.25 10:43, Feike Steenbergen wrote: > Attached is a sample exploit, that achieves this, key components: > > - the GENERATED column uses a user defined immutable function > - this immutable function cannot ALTER ROLE (needs volatile) > - therefore this immutable function calls a volatile function > - the volatile function can contain any security exploit
I propose to address this by not allowing the use of user-defined functions in generation expressions for now. The attached patch implements this. This assumes that all built-in functions are trustworthy, for this purpose, which seems likely true and likely desirable.
I think the feature is still useful like that, and this approach provides a path to add new functionality in the future that grows this set of allowed functions, for example by allowing some configurable set of "trusted" functions or whatever.
