CVE-2021-41122 : Vulnerability Insights and Analysis
Discover the details of CVE-2021-41122, a vulnerability in Vyper affecting versions below 0.3.0. Learn about its impact and how to mitigate the risk.
Vyper is a Pythonic Smart Contract Language for the EVM. In affected versions, external functions did not properly validate the bounds of decimal arguments, leading to potential logic errors. This vulnerability has been addressed in version 0.3.0.
Understanding CVE-2021-41122
Vyper is susceptible to a vulnerability where bounds checks were missing for decimal arguments, potentially resulting in logic errors.
What is CVE-2021-41122?
- Vyper, a Pythonic Smart Contract Language for the EVM, lacked proper validation for decimal arguments in external functions in versions below 0.3.0.
- The issue could lead to logic errors due to unchecked bounds on decimal inputs.
The Impact of CVE-2021-41122
- CVSS Base Score: 4.3 (Medium)
- Attack Vector: Network
- Privileges Required: Low
- Integrity Impact: Low
- The vulnerability's impact has been assessed as medium severity, affecting the integrity of the system.
Technical Details of CVE-2021-41122
This section delves into the technical aspects of the Vyper vulnerability.
Vulnerability Description
- The vulnerability arose from a lack of bounds checking for decimal arguments in external functions.
Affected Systems and Versions
- Vyper versions prior to 0.3.0 are impacted by this vulnerability.
Exploitation Mechanism
- Attackers could exploit this vulnerability by providing malicious inputs within the decimal arguments of external functions, potentially causing logic errors.
Mitigation and Prevention
Measures to mitigate and prevent the exploitation of CVE-2021-41122.
Immediate Steps to Take
- Users should update Vyper to version 0.3.0 or later to mitigate the vulnerability.
- Exercise caution when handling decimal arguments in external functions.
Long-Term Security Practices
- Regularly update software to the latest versions to patch known vulnerabilities.
- Implement secure coding practices to prevent logic errors and validate inputs thoroughly.
Patching and Updates
- Ensure timely application of security patches provided by Vyper to address vulnerabilities.