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Use After Free

CVE-2020-36773

High
9.8/10

Summary

Artifex Ghostscript versions prior to 9.52-test-base-5 has an Out-of-bounds Write and Use-After-Free in "devices/vector/gdevtxtw.c" (for "txtwrite") because a single character code in a PDF document can map to more than one Unicode code point (e.g., for a ligature).

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

CWE-416 - Use After Free

Use-after-free (UaF) vulnerability occurs when the application is using a pointer to memory that has been freed. Any attempt to read/write to a buffer after it is de-allocated allows memory corruption, sensitive information exposure, and can potentially lead to arbitrary code execution.

References

Advisory Timeline

  • Published