Vulnerability · Published Apr 25, 2024 · Assigned by GitHub_M

CVE-2024-32645vyper performs incorrect topic logging in raw_log

Medium 5.3

In plain English

A medium-severity improper input validation in vyper from vyperlang. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.5%top 60.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. In versions 0.3.10 and prior, incorrect values can be logged when `raw_log` builtin is called with memory or storage arguments to be used as topics. A contract search was performed and no vulnerable contracts were found in production. The `build_IR` function of the `RawLog` class fails to properly unwrap the variables provided as topics. Consequently, incorrect values are logged as topics. As of time of publication, no fixed version is available.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	vyper	0.4.0	GHSA-xchq-w5r3-4wg3
PyPI	vyper	0.4.0	PYSEC-2024-206

Affected products (as reported)

Vendor	Product	Versions
vyperlang	vyper	<= 0.3.10

Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

https://github.com/vyperlang/vyper/security/advisories/GHSA-xchq-w5r3-4wg3 x_refsource_CONFIRM