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Check: GEN002220 M6

MACOSX 10.6: GEN002220 M6 (in version v1 r3)

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

Open a terminal session and enter the following command. cat /etc/shells | xargs -n1 ls -lL If any shell has a mode more permissive than 0755, this is a finding.

Fix Text

Open a terminal session and enter the following command to set the mode. chmod 0755 <shell file>

Additional Identifiers

Rule ID: SV-38015r1_rule

Vulnerability ID: V-922

Group Title:

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