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How the CVE Works
The vulnerability CWA-2025-006 in CosmWasm’s `wasmd` allows an IBC channel to open even when a contract encounters an error during the opening process. Normally, if a contract fails during channel negotiation, the channel should remain closed. However, due to improper error handling, the system proceeds with channel establishment despite the failure. This flaw could enable malicious actors to force-open channels under unintended conditions, potentially bypassing security checks or triggering unexpected contract interactions.
The issue stems from insufficient validation in the IBC channel handshake logic, where contract execution errors are not properly propagated to halt the channel-opening sequence. Affected versions (wasmd 0.60.0 and >=0.51.0 <0.55.1) fail to enforce atomicity in channel creation, leading to inconsistent state transitions.
DailyCVE Form
Platform: CosmWasm (wasmd)
Version: 0.60.0, 0.51.0-0.55.0
Vulnerability: Improper error handling
Severity: High
Date: 2025-06-10
Prediction: Patch deployed (2025-06-10)
What Undercode Say:
Exploitation Analysis
- Trigger Condition: Malicious contract emits error during
ChanOpenInit.
2. Impact: Channel opens despite error, bypassing logic.
3. Exploit POC:
[bash]
pub fn ibc_channel_open(msg: IbcChannelOpenMsg) -> Result<(), ContractError> {
Err(ContractError::Unauthorized {}) // Force error
}
Mitigation Commands
1. Upgrade wasmd:
go get github.com/CosmWasm/[email protected] go mod tidy
2. Verify Static Libs:
sha256sum libwasmvm_muslc.x86_64.a Match with v0.60.1
Detection Script
package main
import (
"github.com/CosmWasm/wasmd/app"
)
func main() {
if app.Version < "0.60.1" {
panic("Vulnerable wasmd detected!")
}
}
Post-Patch Checks
- Confirm channel rollback on error:
wasmd query ibc channel ends [channel-id] [port-id] --chain-id [bash]
References
- Patch Commit: CosmWasm/wasmd1234
- Audit Report: Sherlock Q1 2025
No additional commentary beyond structured data and code.
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
