CVE-2024-58263: Integer Overflow in cosmwasm-std Crate Leads to Incorrect Contract Calculations
Hello, security enthusiasts! Today, we're diving into CVE-2024-58263, an integer overflow vulnerability affecting the cosmwasm-std crate, a popular Rust library used for building smart contracts. Let's explore the details and what it means for your projects.
Vulnerability Details
- CVE ID: CVE-2024-58263
- Description: The cosmwasm-std crate before version 2.0.2 for Rust is susceptible to integer overflows, potentially leading to incorrect contract calculations. This can have serious implications for the integrity of smart contract logic.
- CVSS Score: 3.7 (LOW)
- CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- CVSS Explanation: This vulnerability has a low severity score because while it's network-accessible, it requires high attack complexity. An attacker needs to carefully craft their input to trigger the integer overflow. The impact is limited to a low level of integrity compromise, with no impact on confidentiality or availability.
- Exploit Requirements: Successful exploitation requires a crafted input that triggers an integer overflow within the contract's calculations. This typically involves a detailed understanding of the contract's arithmetic operations.
- Affected Vendor: N/A - The vulnerability is within the open-source `cosmwasm-std` crate.
- Affected Product: cosmwasm-std crate
- Affected Version: Versions prior to 2.0.2
- CWE: CWE-190 - Integer Overflow or Wraparound. This means that the software performs a calculation that can result in a value exceeding the maximum (or minimum) size of the variable used to store it. This overflow can lead to unexpected behavior and incorrect results.
Timeline of Events
- 2024-05-27: Vulnerability Reported
- 2024-05-27: Patch Released (cosmwasm-std 2.0.2)
- 2025-07-27: CVE Published
Exploitability & Real-World Risk
While the CVSS score is low, the real-world risk can be significant, especially for smart contracts handling financial transactions or critical logic. An integer overflow can result in incorrect balances, unauthorized transfers, or other unintended consequences. The complexity lies in crafting the specific input to trigger the overflow, which requires a deep understanding of the affected contract's code. This is important as CosmWasm is used by a large number of smart contracts and blockchain applications.
Recommendations
- Upgrade: Update your `cosmwasm-std` crate to version 2.0.2 or later.
- Code Review: Review your contract code for arithmetic operations that could be vulnerable to integer overflows. Consider using safe math libraries that prevent overflows.
- Testing: Implement thorough unit and integration tests, specifically targeting potential overflow scenarios.
Technical Insight
Integer overflows occur when the result of an arithmetic operation exceeds the maximum value that can be stored in a given data type. In the context of `cosmwasm-std`, this could happen in calculations involving token amounts, timestamps, or other critical parameters. For example, if a calculation results in a value greater than the maximum value of a `u64` (unsigned 64-bit integer), the value will wrap around to zero, leading to incorrect results.
Credit to Researcher(s)
The discovery and reporting of this vulnerability are credited to the CosmWasm security team.
References
Tags
#CosmWasm #IntegerOverflow #CVE-2024-58263 #Rust #SmartContracts #SecurityVulnerability
Summary: CVE-2024-58263 is an integer overflow vulnerability in the cosmwasm-std crate before version 2.0.2 for Rust. This can lead to incorrect contract calculations, potentially impacting the integrity of smart contract logic. Upgrade to version 2.0.2 or later and review code for potential overflow scenarios.
CVE ID: CVE-2024-58263
Risk Analysis: While the CVSS score is low, successful exploitation can lead to incorrect balances, unauthorized transfers, or other unintended consequences within the smart contract. The impact depends on the specific logic and functionality of the affected contract.
Recommendation: Upgrade the cosmwasm-std crate to version 2.0.2 or later. Review code for potential integer overflow vulnerabilities and consider using safe math libraries to prevent overflows. Implement thorough unit and integration tests to detect potential overflow scenarios.
Timeline
- 2024-05-27: Vulnerability Reported
- 2024-05-27: Patch Released (cosmwasm-std 2.0.2)
- 2025-07-27: CVE Published