CVE-2023-30629

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`.

How to fix CVE-2023-30629

To remediate CVE-2023-30629, upgrade the affected package to a fixed version below.

• —upgrade to 0.3.8 or later
• —upgrade to 851f7a1b3aa2a36fd041e3d0ed38f9355a58c8ae or later

Is CVE-2023-30629 being exploited?

Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• >= 0.3.1, < 0.3.8
• from 0, < 851f7a1b3aa2a36fd041e3d0ed38f9355a58c8ae | >= 0.3.1, < 0.3.8

CVSS scores

References (8)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2023-30629
• PATCHgithub.com/vyperlang/vyper
• WEBdocs.vyperlang.org/en/v0.3.7/built-in-functions.html#raw_call
• WEBgithub.com/lidofinance/gate-seals/blob/051593e74df01a4131c485b4fda52e691cd4b7d8/contracts/GateSeal.vy#L164