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Check: GEN002220

VMware ESX 3 Server: GEN002220 (in version v1 r2)

Title

All shell files must have mode 0755 or less permissive. (Cat I impact)

Discussion

Shells with world/group-write permissions give the ability to maliciously modify the shell to obtain unauthorized access.

Check Content

If /etc/shells exists, check the group ownership of each shell referenced. # cat /etc/shells | xargs -n1 ls -lL Otherwise, check any shells found on the system. # find / -name "*sh" | xargs -n1 ls -lL If a shell has a mode more permissive than 0755, this is a finding.

Fix Text

Change the mode of the shell. # chmod 0755 <shell>

Additional Identifiers

Rule ID: SV-922r2_rule

Vulnerability ID: V-922

Group Title: GEN002220

Expert Comments

Expert comments are only available to logged-in users.

CCIs

CCIs tied to check.

Number	Definition
CCI-000225	Employ the principle of least privilege, allowing only authorized accesses for users (or processes acting on behalf of users) which are necessary to accomplish assigned organizational tasks.

Controls

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

Number	Title
AC-6	Least Privilege