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Check: GEN005770

AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE: GEN005770 (in versions v1 r14 through v1 r10)

Title

The NFS exports configuration file must not have an extended ACL. (Cat III impact)

Discussion

File system extended ACLs provide access to files beyond what is allowed by the mode numbers of the files. Excessive permissions on the NFS export configuration file could allow unauthorized modification of the file, which could result in Denial of Service to authorized NFS exports and the creation of additional unauthorized exports.

Check Content

# aclget /etc/exports If the extended attributes are not disabled, this is a finding.

Fix Text

Remove the extended ACL from the NFS export configuration file and change extended attributes to disabled. #acledit /etc/exports

Additional Identifiers

Rule ID: SV-38823r1_rule

Vulnerability ID: V-22493

Group Title: GEN005770

Expert Comments

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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