CVE-2022-29219
AttesterSlashing number overflow
Description
### Impact Possible consensus split given maliciously-crafted `AttesterSlashing` or `ProposerSlashing` being included on-chain. Since we represent `uint64` values as native javascript `number`s, there is an issue when those variables with large (greater than 2^53) `uint64` values are included on chain. In those cases, Lodestar may view _valid_ `AttesterSlashing` or `ProposerSlashing` as _invalid_, due to rounding errors in large `number` values. This causes a consensus split, where Lodestar nodes are forked away from the main network. Similarly Lodestar may consider _invalid_ `ProposerSlashing` as _valid_, thus including in proposed blocks that will be considered invalid by the network. ### Patches https://github.com/ChainSafe/lodestar/pull/3977 ### Workarounds Use `BigInt` to represent `Slot` and `Epoch` values in `AttesterSlashing` and `ProposerSlashing` objects. `BigInt` is too slow to be used in all `Slot` and `Epoch` cases, so we will carefully use `BigInt` just where necessary for consensus.
How to fix CVE-2022-29219
To remediate CVE-2022-29219, upgrade the affected package to a fixed version below.
- —upgrade to 0.36.0 or later
Is CVE-2022-29219 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 0.36.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |