Submitted by Jeiwan, also found by AkshaySrivastav, peritoflores, and ladboy233
A malicious node operator may create a minipool that cannot be cancelled.
Rialto may cancel a minipool by calling cancelMinipoolByMultisig, however the function sends AVAX to the minipool owner, and the owner may block receiving of AVAX, causing the call to cancelMinipoolByMultisig to fail (MinipoolManager.sol#L664):
The following PoC demonstrates how calls to cancelMinipoolByMultisig can be blocked:
Consider using the Pull over Push pattern to return AVAX to owners of minipools that are canceled by Rialto.
emersoncloud (GoGoPool) confirmed
Alex the Entreprenerd (judge) commented:
emersoncloud (GoGoPool) commented:
