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Check: GEN003520

AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE: GEN003520 (in versions v1 r14 through v1 r10)

Title

The kernel core dump data directory must be owned by root. (Cat III impact)

Discussion

Kernel core dumps may contain the full contents of system memory at the time of the crash. As the system memory may contain sensitive information, it must be protected accordingly. If the kernel core dump data directory is not owned by root, the core dumps contained in the directory may be subject to unauthorized access.

Check Content

Determine the core file copy location. #sysdumpdev -l | grep -i "core dir" Check the ownership of the kernel core dump data directory. # ls -ld < dump file location > If the kernel core dump data directory is not owned by root, this is a finding.

Fix Text

Change the owner of the kernel core dump data directory to root. # chown root /var/adm/ras Supplementary Information: The location of the kernel dump area should be moved out of /var/adm/ras. This directory may be world read/writeable. A suggestion would be to create /var/adm/kcore; chown root:sys /var/adm/kcore; chmod 700 /var/adm/kcore. Change where the system copies its kernel core files to. sysdumpdev -d /var/adm/kcore

Additional Identifiers

Rule ID: SV-38861r1_rule

Vulnerability ID: V-11997

Group Title: GEN003520

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