Check: GEN001365
SUSE Linux Enterprise Server v11 for System z STIG:
GEN001365
(in versions v1 r12 through v1 r9)
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
Verify /etc/resolv.conf has no extended ACL. # ls -l /etc/resolv.conf If the permissions include a '+', the file has an extended ACL. If the file has an extended ACL and it has not been documented with the IAO, this is a finding.
Fix Text
Remove the extended ACL from the file. # setfacl --remove-all /etc/resolv.conf
Additional Identifiers
Rule ID: SV-44978r1_rule
Vulnerability ID: V-22322
Group Title: GEN001365
Expert Comments
CCIs
| 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
| Number | Title |
|---|---|
| AC-6 |
Least Privilege |