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CVE-2023-37902

5.3 · MEDIUM

Vyper is a Pythonic programming language that targets the Ethereum Virtual Machine (EVM).

Published Jul 25, 2023CWE-252EPSS 0.57%

Overview

CVE-2023-37902 is a medium-severity vulnerability. It was published on July 25, 2023 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Vyper is a Pythonic programming language that targets the Ethereum Virtual Machine (EVM). Prior to version 0.3.10, the ecrecover precompile does not fill the output buffer if the signature does not verify. However, the ecrecover builtin will still return whatever is at memory location 0. This means that the if the compiler has been convinced to write to the 0 memory location with specially crafted data (generally, this can happen with a hashmap access or immutable read) just before the ecrecover, a signature check might pass on an invalid signature. Version 0.3.10 contains a patch for this issue.

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

GitHubgithub.com/vyperlang/vyper/commit/019a37ab98ff53f04fecfadf602b6cd5ac748f7fGitHubgithub.com/vyperlang/vyper/security/advisories/GHSA-f5x6-7qgp-jhf3GitHubgithub.com/vyperlang/vyper/commit/019a37ab98ff53f04fecfadf602b6cd5ac748f7fGitHubgithub.com/vyperlang/vyper/security/advisories/GHSA-f5x6-7qgp-jhf3

How CyberStrike helps

Frequently asked questions

What is CVE-2023-37902?

CVE-2023-37902 is a medium-severity vulnerability. It was published on July 25, 2023 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2023-37902?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-37902?

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-2023-37902?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-37902 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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