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celestiaorg / celestia-app

PoS application for the consensus portion of the Celestia network. Built using celestia-core (fork of CometBFT) and the cosmos-sdk
https://celestia.org
Apache License 2.0
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fix!: msg gatekeeper for authz messages #3555

Closed rootulp closed 1 week ago

rootulp commented 2 weeks ago

Resolves this security advisory. Thanks @Reecepbcups for the report and fix!

coderabbitai[bot] commented 2 weeks ago

Walkthrough

The changes introduce enhanced validation for nested authz messages within the MsgVersioningGateKeeper's AnteHandle function. A new function, hasInvalidMsg, recursively checks for invalid messages, ensuring thorough validation. Corresponding test cases have been added to validate nested MsgSend and MsgMultiSend messages, ensuring they are processed correctly based on their versions and types.

Changes

Files Change Summary
app/ante/msg_gatekeeper.go Added recursive invalid message check via hasInvalidMsg function; updated AnteHandle for message validation.
app/ante/msg_gatekeeper_test.go Added nested message handling and test cases for MsgSend and MsgMultiSend using authz.MsgExec.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant MsgVersioningGateKeeper
    participant hasInvalidMsg
    participant authz.MsgExec

    User->>MsgVersioningGateKeeper: Submit transaction with nested messages
    MsgVersioningGateKeeper->>hasInvalidMsg: Check for invalid messages
    hasInvalidMsg->>authz.MsgExec: Recursively validate nested messages
    authz.MsgExec-->>hasInvalidMsg: Return validation result
    hasInvalidMsg-->>MsgVersioningGateKeeper: Return validation result
    MsgVersioningGateKeeper-->>User: Return transaction result

This diagram illustrates the interaction between the user, MsgVersioningGateKeeper, hasInvalidMsg function, and nested authz.MsgExec during the transaction validation process.

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cmwaters commented 2 weeks ago

is this consensus breaking?

yes because a node who doesn't have this change would allow the tx to get into a block while a node that does would reject the block.