Check: GEN004400
VMware ESX 3 Server:
GEN004400
(in version v1 r2)
Title
Files executed through a mail aliases file must be owned by root and must reside within a directory owned and writable only by root. (Cat I impact)
Discussion
If a file executed through a mail aliases file is not owned and writable only by root, it may be subject to unauthorized modification. Unauthorized modification of files executed through aliases may allow unauthorized users to attain root privileges.
Check Content
Find the aliases file on the system. Procedure: # find / -name aliases -depth -print # more < aliases file location > Examine the aliases file for any directories or paths that may be utilized. Procedure: # ls -lL < path > Check if the file or parent directory is owned by root. If not, this is a finding.
Fix Text
Edit the /etc/mail/aliases file (alternatively, /usr/lib/sendmail.cf). Locate the entries executing a program. They will appear similar to the following line. Aliasname: : /usr/local/bin/ls (or some other program name) Ensure root owns the programs and the directory(ies) they reside in by using the chown command to change owner to root. Procedure: # chown root filename
Additional Identifiers
Rule ID: SV-833r2_rule
Vulnerability ID: V-833
Group Title: GEN004400
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 |