GHSA-8wcc-m6j2-qxvm ASA-2024-0012, ASA-2024-0013: CosmosSDK: Transaction decoding may result in a stack overflow or resource exhaustion

• Go github.com/cosmos/cosmos-sdk: >= 0.50.0-alpha.0, < 0.50.11 → fixed in 0.50.11 • Go github.com/cosmos/cosmos-sdk: < 0.47.15 → fixed in 0.47.15 • Go cosmossdk.io/x/tx: < 0.13.7 → fixed in 0.13.7

Summary ASA-2024-0012 Name: ASA-2024-0012, Transaction decoding may result in a stack overflow Component: Cosmos SDK Criticality: High (Considerable Impact, and Possible Likelihood per ACMv1.2) Affected versions: cosmos-sdk versions <= v0.50.10, <= v0.47.14 Affected users: Chain Builders + Maintainers, Validators, node operators ASA-2024-0013 Name: ASA-2024-0013: CosmosSDK: Transaction decoding may result in resource exhaustion Component: Cosmos SDK Criticality: High (Considerable Impact, and Possible Likelihood per ACMv1.2) Affected versions: cosmos-sdk versions <= v0.50.10, <= v0.47.14 Affected users: Chain Builders + Maintainers, Validators, node operators Impact ASA-2024-0012 When decoding a maliciously formed packet with a deeply-nested structure, it may be possible for a stack overflow to occur and result in a network halt. This was addressed by adding a recursion limit while decoding the packet. ASA-2024-0013 Nested messages in a transaction can consume exponential cpu and memory on `UnpackAny` calls. The`max_tx_bytes` sets a limit for external TX but is not applied for internal messages emitted by wasm contracts or a malicious validator block. This may result in a node crashing due to resource exhaustion. This was addressed by adding additional validation to prevent this condition. Patches The issues above are resolved in Cosmos SDK versions v0.47.15 or v0.50.11. Please upgrade ASAP. Timeline for ASA-2024-0012 • October 1, 2024, 12:29pm UTC: Issue reported to the Cosmos Bug Bounty program • October 1, 2024, 2:47pm UTC: Issue triaged by Amulet on-call, and distributed to Core team • December 9, 2024, 11:13am UTC: Core team completes patch for issue • Dec 14, 2024,16:00 UTC: Pre-notification delivered • Dec 16, 2024, 16:00 UTC: Patch made available This issue was reported to the Cosmos Bug Bounty Program on HackerOne on October 1, 2024. Timeline for ASA-2024-0013 • October 19, 2024, 8:12pm UTC: Issue reported to the Cosmos Bug Bounty program • October 19, 2024, 8:28pm UTC: Issue triaged by Amulet on-call, and distributed to Core team • December 11, 2024, 3:31pm UTC: Core team completes patch for issue • Dec 14, 2024, 16:00 UTC: Pre-notification delivered • Dec 16, 2024, 16:00 UTC: Patch made available This issue was reported by LonelySloth to the Cosmos Bug Bounty Program on HackerOne on October 19, 2024. If you believe you have found a bug in the Interchain Stack or would like to contribute to the program by reporting a bug, please see https://hackerone.com/cosmos. If you have questions about Interchain security efforts, please reach out to our official communication channel at [email protected]. For more information about the Interchain Foundation’s engagement with Amulet, and to sign up for security notification emails, please see https://github.com/interchainio/security.