Vulnerability Information
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Success of Certain Precompile Calls not Checked in Vyper
Vulnerability Description
Vyper is a Pythonic Smart Contract Language for the EVM. When the Vyper Compiler uses the precompiles EcRecover (0x1) and Identity (0x4), the success flag of the call is not checked. As a consequence an attacker can provide a specific amount of gas to make these calls fail but let the overall execution continue. Then the execution result can be incorrect. Based on EVM's rules, after the failed precompile the remaining code has only 1/64 of the pre-call-gas left (as 63/64 were forwarded and spent). Hence, only fairly simple executions can follow the failed precompile calls. Therefore, we found no significantly impacted real-world contracts. None the less an advisory has been made out of an abundance of caution. This issue is fixed in 0.4.1.
CVSS Information
N/A
Vulnerability Type
控制流实现总是不正确
Vulnerability Title
Vyper 安全漏洞
Vulnerability Description
Vyper是vyperlang开源的一个 EVM 的 Pythonic 智能合约语言。 Vyper 0.4.0及之前版本存在安全漏洞，该漏洞源于编译器在使用预编译EcRecover和Identity时未检查调用的成功标志，可能导致执行结果不正确。
CVSS Information
N/A
Vulnerability Type
N/A