# GO-2023-2156 - Cosmos packet-forward-middleware vulnerable to chain-halt in…

Source: https://junglewise.ai/threats/go-2023-2156-cosmos-packet-forward-middleware-vulnerable-to-chain-halt-9acebca2  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2024-08-21  
License: CC BY 4.0 with a link back

Severity: info · Published 2024-08-21

Cosmos packet-forward-middleware vulnerable to chain-halt in github.com/cosmos/ibc-apps/middleware/packet-forward-middleware

Technologies: [github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v4 (Go)](https://junglewise.ai/threats/technologies/github-com-cosmos-ibc-apps-middleware-packet-forward-middleware-v4), [github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v5 (Go)](https://junglewise.ai/threats/technologies/github-com-cosmos-ibc-apps-middleware-packet-forward-middleware-v5), [github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v6 (Go)](https://junglewise.ai/threats/technologies/github-com-cosmos-ibc-apps-middleware-packet-forward-middleware-v6). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Informational severity, published 21 August 2024.

**Which products and versions are affected?** github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v4 (Go) SEMVER:introduced=0,fixed=4.1.1; github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v5 (Go) SEMVER:introduced=0,fixed=5.2.1; github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v6 (Go) SEMVER:introduced=0,fixed=6.1.1.

**Is there a fix for This vulnerability?** Yes. github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v4 (Go): upgrade to 4.1.1 or later; github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v5 (Go): upgrade to 5.2.1 or later; github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v6 (Go): upgrade to 6.1.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v4 (Go), github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v5 (Go) or github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v6 (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v4 (Go): upgrade to 4.1.1 or later

  ```sh
  go get github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v4@v4.1.1
  ```

- github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v5 (Go): upgrade to 5.2.1 or later

  ```sh
  go get github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v5@v5.2.1
  ```

- github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v6 (Go): upgrade to 6.1.1 or later

  ```sh
  go get github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v6@v6.1.1
  ```


## Affected products

- github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v4 (Go) SEMVER:introduced=0,fixed=4.1.1
- github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v5 (Go) SEMVER:introduced=0,fixed=5.2.1
- github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v6 (Go) SEMVER:introduced=0,fixed=6.1.1

## Related threats

- [GO-2025-3463 - DoS may temporarily disable IBC transfers to native chain in…](https://junglewise.ai/threats/go-2025-3463-dos-may-temporarily-disable-ibc-transfers-to-native-chain-44313a41)
- [Potential Denial-of-Service condition leading to temporary disability in IBC transfers to the native chain](https://junglewise.ai/threats/potential-denial-of-service-condition-leading-to-temporary-disability-0c7dc22d)
- [Cosmos packet-forward-middleware vulnerable to chain-halt](https://junglewise.ai/threats/cosmos-packet-forward-middleware-vulnerable-to-chain-halt-6f0aaff7)