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Out-of-bounds Write

CVE-2021-3520

High
9.8/10

Summary

There's a flaw in lz4 prior to 1.9.4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of "memmove()" on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.

  • 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