Anyone can read password from the contract
Summary
Anyone can read the password from the contract via low-level storage read.
Vulnerability Details
Even though it was marked with private and other smart contract address can't read via getter function, this can be circumvent offchain with simulated contract read that has owner as tx.origin or using low-level contract read.
as example, here is the code used with ethers.js v5
await provider.getStorageAt(
The storage slot is 1 because password is a second storage variable declared in the code.
Impact
High
Tools Used
ethers.js
Recommendations
Don't store sensitive data on the blockchain!
Lead Judging Commences
finding-anyone-can-read-storage
Private functions and state variables are only visible for the contract they are defined in and not in derived contracts. In this case private doesn't mean secret/confidential
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