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Out-of-bounds Write

CVE-2024-24561

High
9.8/10

Summary

Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. The bounds check for slices does not account for the ability for "start + length" to overflow when the values aren't literals. If a "slice()" function uses a non-literal argument for the "start" or "length" variable, this creates the ability for an attacker to overflow the bounds check. This issue can be used to do Out-of-bounds (OOB) access to storage, memory, or calldata addresses. It can also be used to corrupt the length slot of the respective array. This issue affects versions prior to 0.4.0b6.

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • HIGH

CWE-787 - Out-of-Bounds Write

Out-of-bounds write vulnerability is a memory access bug that allows software to write data past the end or before the beginning of the intended buffer. This may result in the corruption of data, a crash, or arbitrary code execution.

References

Advisory Timeline

  • Published