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CVE-2023-30629

7.5 · HIGH

Vyper is a Pythonic Smart Contract Language for the ethereum virtual machine.

Published Apr 24, 2023CWE-670EPSS 0.88%

Overview

CVE-2023-30629 is a high-severity vulnerability. It was published on April 24, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Vyper is a Pythonic Smart Contract Language for the ethereum virtual machine. In versions 0.3.1 through 0.3.7, the Vyper compiler generates the wrong bytecode. Any contract that uses the `raw_call` with `revert_on_failure=False` and `max_outsize=0` receives the wrong response from `raw_call`. Depending on the memory garbage, the result can be either `True` or `False`. A patch is available and, as of time of publication, anticipated to be part of Vyper 0.3.8. As a workaround, one may always put `max_outsize>0`.

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

Refdocs.vyperlang.org/en/v0.3.7/built-in-functions.html#raw_callGitHubgithub.com/lidofinance/gate-seals/blob/051593e74df01a4131c485b4fda52e691cd4b7d8/contracts/GateSeal.vy#L164GitHubgithub.com/lidofinance/gate-seals/pull/5/filesGitHubgithub.com/vyperlang/vyper/commit/851f7a1b3aa2a36fd041e3d0ed38f9355a58c8aeGitHubgithub.com/vyperlang/vyper/security/advisories/GHSA-w9g2-3w7p-72g9Refdocs.vyperlang.org/en/v0.3.7/built-in-functions.html#raw_callGitHubgithub.com/lidofinance/gate-seals/blob/051593e74df01a4131c485b4fda52e691cd4b7d8/contracts/GateSeal.vy#L164GitHubgithub.com/lidofinance/gate-seals/pull/5/filesGitHubgithub.com/vyperlang/vyper/commit/851f7a1b3aa2a36fd041e3d0ed38f9355a58c8aeGitHubgithub.com/vyperlang/vyper/security/advisories/GHSA-w9g2-3w7p-72g9

How CyberStrike helps

Frequently asked questions

What is CVE-2023-30629?

CVE-2023-30629 is a high-severity vulnerability. It was published on April 24, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-30629?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-30629?

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-2023-30629?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-30629 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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