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Integer Overflow or Wraparound

CVE-2024-45491

High
9.8/10

Summary

An issue was discovered in libexpat versions prior to 2.6.3. The "dtdCopy" in "xmlparse.c" can have an integer overflow for "nDefaultAtts" on 32-bit platforms (where "UINT_MAX" equals "SIZE_MAX").

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • 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