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Improper Check for Unusual or Exceptional Conditions

CVE-2020-7453

Medium
6/10

Summary

In FreeBSD 12.1-STABLE before r359021, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r359020, and 11.3-RELEASE before 11.3-RELEASE-p7, a missing null termination check in the jail_set configuration option "osrelease" may return more bytes with a subsequent jail_get system call allowing a malicious jail superuser with permission to create nested jails to read kernel memory.

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

CWE-754 - Improper Check for Unusual or Exceptional Conditions

The software does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the software.

References

Advisory Timeline

  • Published