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Advisories

Vyper 0.2.13 before 0.2.15 Storage Corruption via @nonreentrant Decorator

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Severity
high
Date
Affecting

  • vyper >= 0.2.13, < 0.2.15

CWE
  • CWE-787 Out-of-bounds Write
CVSS
8.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
pandadefi, charles-cooper, iamdefinitelyahuman
Description
Vyper from 0.2.13 before 0.2.15 allocates storage slots for @nonreentrant reentrancy locks at the same locations as contract storage variables. When a function using @nonreentrant is called, setting the lock overwrites the overlapping storage variable, corrupting contract state and breaking the contract's intended logic.

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