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Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVE-2020-8252

High
7.8/10

Summary

The implementation of realpath in libuv 10.x before 10.22.1, 12.x before 12.18.4, and 14.x before 14.9.0 used within Node.js incorrectly determined the buffer size which can result in a buffer overflow if the resolved path is longer than 256 bytes.

  • LOW
  • LOCAL
  • HIGH
  • UNCHANGED
  • NONE
  • LOW
  • HIGH
  • HIGH

CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

The program copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

References

Advisory Timeline

  • Published