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CVE-2021-41135

6.5 · MEDIUM

The Cosmos-SDK is a framework for building blockchain applications in Golang.

Published Oct 20, 2021CWE-754EPSS 1.71%

Overview

CVE-2021-41135 is a medium-severity vulnerability. It was published on October 20, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

The Cosmos-SDK is a framework for building blockchain applications in Golang. Affected versions of the SDK were vulnerable to a consensus halt due to non-deterministic behaviour in a ValidateBasic method in the x/authz module. The MsgGrant of the x/authz module contains a Grant field which includes a user-defined expiration time for when the authorization grant expires. In Grant.ValidateBasic(), that time is compared to the node’s local clock time. Any chain running an affected version of the SDK with the authz module enabled could be halted by anyone with the ability to send transactions on that chain. Recovery would require applying the patch and rolling back the latest block. Users are advised to update to version 0.44.2.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refforum.cosmos.network/t/cosmos-sdk-vulnerability-retrospective-security-advisory-jackfruit-october-12-2021/5349GitHubgithub.com/cosmos/cosmos-sdk/commit/68ab790a761e80d3674f821794cf18ccbfed45eeGitHubgithub.com/cosmos/cosmos-sdk/security/advisories/GHSA-2p6r-37p9-89p2Refforum.cosmos.network/t/cosmos-sdk-vulnerability-retrospective-security-advisory-jackfruit-october-12-2021/5349GitHubgithub.com/cosmos/cosmos-sdk/commit/68ab790a761e80d3674f821794cf18ccbfed45eeGitHubgithub.com/cosmos/cosmos-sdk/security/advisories/GHSA-2p6r-37p9-89p2

How CyberStrike helps

Frequently asked questions

What is CVE-2021-41135?

CVE-2021-41135 is a medium-severity vulnerability. It was published on October 20, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2021-41135?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-41135?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-41135?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-41135 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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