Navigate

Check: GEN001365 M6

MACOSX 10.6: GEN001365 M6 (in version v1 r3)

Title

The /etc/resolv.conf file must not have an extended ACL. (Cat II impact)

Discussion

The resolv.conf (or equivalent) file configures the system's DNS resolver. DNS is used to resolve host names to IP addresses. If DNS configuration is modified maliciously, host name resolution may fail or return incorrect information. DNS may be used by a variety of system security functions, such as time synchronization, centralized authentication, and remote system logging.

Check Content

Open a terminal session and enter the following command to view the resolv.conf file extended ACLs. ls -lL /etc/resolv.conf If the permissions include a '+', the file has an extended ACL, this is a finding.

Fix Text

Open a terminal session and enter the following command to remove the extended ACLs. chmod -N /etc/resolv.conf

Additional Identifiers

Rule ID: SV-38081r1_rule

Vulnerability ID: V-22322

Group Title:

Expert Comments

Expert comments are only available to logged-in users.

CCIs

CCIs tied to check.

Number	Definition
CCI-000225	The organization employs the concept of least privilege, allowing only authorized accesses for users (and processes acting on behalf of users) which are necessary to accomplish assigned tasks in accordance with organizational missions and business functions.

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
AC-6	Least Privilege