The vulnerability of the jail_set() and jail_get() functions in the FreeBSD operating system’s kernel allows a hacker to increase their privileges.

The functions jailset and jailget of the FreeBSD operating system have a vulnerability related to memory reclamation errors. Exploiting this vulnerability can allow an attacker to increase their privileges...

Null pointer dereference

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 jailset configuration option "osrelease" may return more bytes with a subsequent jailget system call allowing a...

CVE-2020-7453

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 jailset configuration option "osrelease" may return more bytes with a subsequent jailget system call allowing a...

CVE-2020-7453: Improper Check for Unusual or Exceptional Conditions

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 jailset configuration option "osrelease" may return more bytes with a subsequent jailget system call allowing a...

FreeBSD -- Kernel memory disclosure with nested jails

Problem Description: A missing NUL-termination check for the jailset2 configration option "osrelease" may return more bytes when reading the jail configuration back with jailget2 than were originally set. Impact: For jails with a non-default setting of children.max 0 "nested jails" a superuser...