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CVE-2022-29219
May 24, 2022
Lodestar is a TypeScript implementation of the Ethereum Consensus specification. Prior to version 0.36.0, there is a possible consensus split given maliciously-crafted "AttesterSlashing" or "ProposerSlashing" being included on-chain. Because the developers 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. Version 0.36.0 contains a fix for this issue. As a workaround, 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 one may carefully use "BigInt" just where necessary for consensus.
Affected Packages
@chainsafe/lodestar (NPM):
Affected version(s) >=0.6.0 <0.36.0
Fix Suggestion:
Update to version 0.36.0
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
CVSS v2
Base Score:
5
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Weakness Type (CWE)
Integer Overflow or Wraparound
EPSS
Base Score:
0.29