Title

Kernel core dumps must be disabled unless needed. (Cat II impact)

Discussion

Kernel core dumps may contain the full contents of system memory at the time of the crash. Kernel core dumps may consume a considerable amount of disk space and may result in Denial of Service by exhausting the available space on the target file system. The kernel core dump process may increase the amount of time a system is unavailable due to a crash. Kernel core dumps can be useful for kernel debugging.

Check Content

Verify crash dumps are disabled. # crashconf -v If the included list is not empty or fully disabled, this is a finding. Alternatively, # crashconf -v | tr '\011' ' ' | tr -s ' ' | sed -e 's/^[ \t]*//' | cut -f 3,3 -d " " | \ egrep -c -i "yes," If the above command returns a value >0, this is a finding.

Fix Text

Disable crash dumps. # crashconf -e all Additionally, edit /etc/rc.config.d/crashconf and: • set CRASH_EXCLUDED_PAGES="all" • set CRASHCONF_ENABLED="0"

Additional Identifiers

Rule ID: SV-35259r1_rule

Vulnerability ID: V-22404

Group Title: GEN003510

Expert Comments

CCIs tied to check.

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