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Integer Overflow or Wraparound

CVE-2021-46143

High
7.8/10

Summary

In "doProlog" in "xmlparse.c" in Expat (aka libexpat) before 2.4.3, an integer overflow exists for "m_groupSize".

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

CWE-190 - Integer Overflow or Wraparound

The software performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control.

References

Advisory Timeline

  • Published