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Medium severity6.0NVD Advisory· Published Apr 29, 2020· Updated Jun 17, 2026

CVE-2020-7453

CVE-2020-7453

Description

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.

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Affected products

12
  • FreeBSD/FreeBSD11 versions
    cpe:2.3:o:freebsd:freebsd:11.3:-:*:*:*:*:*:*+ 10 more
    • cpe:2.3:o:freebsd:freebsd:11.3:-:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p1:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p2:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p3:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p4:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p5:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p6:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:-:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:p1:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:p2:*:*:*:*:*:*
    • (no CPE)range: <12.1-RELEASE-p3, <11.3-RELEASE-p7
  • FreeBSD/FreeBSDdescription

Patches

Vulnerability mechanics

References

1

News mentions

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