Description
nimiq-account contains account primitives to be used in Nimiq's Rust implementation. Prior to version 1.3.0, `VestingContract::can_change_balance` returns `AccountError::InsufficientFunds` when `new_balance < min_cap`, but it constructs the error using `balance: self.balance - min_cap`. `Coin::sub` panics on underflow, so if an attacker can reach a state where `min_cap > balance`, the node crashes while trying to return an error. The `min_cap > balance` precondition is attacker-reachable because the vesting contract creation data (32-byte format) allows encoding `total_amount` without validating `total_amount <= transaction.value` (the real contract balance). After creating such a vesting contract, the attacker can broadcast an outgoing transaction to trigger the panic during mempool admission and block processing. The patch for this vulnerability is included as part of v1.3.0. No known workarounds are available.
Problem types
CWE-191: Integer Underflow (Wrap or Wraparound)
Product status
References
github.com/...atross/security/advisories/GHSA-vc34-39q2-m6q3
github.com/nimiq/core-rs-albatross/pull/3658
github.com/...ommit/4d01946f0b3d6c6e31786f91cdfb3eb902908da0
github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0