Title

Mailbox access control mechanisms are not audited for changes. (Cat II impact)

Discussion

Unauthorized or malicious data changes can compromise the integrity and usefulness of the data, Automated attacks or malicious users with elevated privileges have the ability to affect change using the same mechanisms as E-mail administrators. Auditing changes to access mechanisms supports accountability and non-repudiation for those authorized to define the environment but also enables investigation of changes made by others who may not be authorized.

Check Content

Exchange System Manager >> Administrative Groups >> [administrative group] >> Servers >> [server] >> [storage group] >> Mailbox Store >> Properties >> Security tab >> Advanced button >> Audit tab All listed items must be selected for “change permissions”, “take ownership”, “add/remove self”, and “write properties”. Criteria: If all items are selected for “change permissions”, “take ownership”, “add/remove self”, and “write properties”, this is not a finding.

Fix Text

Ensure that access control mechanisms are audited. Procedure: Exchange System Manager >> Administrative Groups >> [administrative group] >> Servers >> [server] >> [storage group] >> Mailbox Store >> Properties >> Security tab >> Advanced button >> Audit tab Select “change permissions”, “take ownership”, “add/remove self”, and “write properties”.

Additional Identifiers

Rule ID: SV-21025r1_rule

Vulnerability ID: V-19186

Group Title:

Expert Comments

CCIs tied to check.

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