CVE-2024-22419 : Exploit Details and Defense Strategies

This CVE-2024-22419 involves the

concat

built-in function in Vyper, a Pythonic Smart Contract Language for the Ethereum Virtual Machine. The vulnerability can lead to memory corruption due to buffer overflow, potentially changing the semantics of affected contracts.

Understanding CVE-2024-22419

This section delves into the details of the CVE-2024-22419 vulnerability in Vyper.

What is CVE-2024-22419?

The vulnerability (CVE-2024-22419) stems from the

concat

built-in function in Vyper, where memory buffer overflows can occur, allowing the overwriting of existing valid data due to improper adherence of the

build_IR

to copy function APIs.

The Impact of CVE-2024-22419

This vulnerability has a high severity base score of 7.3, posing a risk of changing contract semantics and potentially going unnoticed during testing due to its length-dependent nature. However, not all uses of

concat

will result in overwriting valid data, as specific conditions need to be met.

Technical Details of CVE-2024-22419

Explore the technical aspects of CVE-2024-22419 vulnerability in Vyper.

Vulnerability Description

The vulnerability arises from the

concat

built-in function in Vyper, leading to memory buffer overflows that can overwrite existing data and change contract semantics.

Affected Systems and Versions

The impacted system is Vyper with versions <= 0.3.10 being affected by this vulnerability.

Exploitation Mechanism

The root cause lies in the improper adherence of the

build_IR

for

concat

to copy function APIs, allowing for buffer overflows and memory corruption.

Mitigation and Prevention

Understanding how to mitigate and prevent CVE-2024-22419 vulnerability in Vyper.

Immediate Steps to Take

Users are advised to update to the patched versions to prevent buffer overflows and memory corruption issues.

Long-Term Security Practices

Practicing secure coding standards and conducting thorough testing can help prevent similar vulnerabilities in the future.

Patching and Updates

The issue has been addressed in commit

55e18f6d1

, which will be included in future Vyper releases. Users are recommended to update their systems to the patched versions as soon as possible to mitigate the risk of memory corruption and buffer overflows.