Check: PHTN-67-000111
VMware vSphere 6.7 Photon OS STIG:
PHTN-67-000111
(in versions v1 r6 through v1 r1)
Title
The Photon operating system must not perform multicast packet forwarding. (Cat II impact)
Discussion
Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this software is used when not required, system network information may be unnecessarily transmitted across the network.
Check Content
At the command line, execute the following command: # /sbin/sysctl -a --pattern "net.ipv[4|6].conf.(all|default|eth.*).mc_forwarding" Expected result: net.ipv4.conf.all.mc_forwarding = 0 net.ipv4.conf.default.mc_forwarding = 0 net.ipv4.conf.eth0.mc_forwarding = 0 net.ipv6.conf.all.mc_forwarding = 0 net.ipv6.conf.default.mc_forwarding = 0 net.ipv6.conf.eth0.mc_forwarding = 0 If the output does not match the expected result, this is a finding. Note: The number of "ethx" lines returned is dependent on the number of interfaces. Every "ethx" entry must be set to "0".
Fix Text
Open /etc/sysctl.conf with a text editor. Add or update the following lines: net.ipv4.conf.all.mc_forwarding = 0 net.ipv4.conf.default.mc_forwarding = 0 net.ipv4.conf.eth0.mc_forwarding = 0 net.ipv6.conf.all.mc_forwarding = 0 net.ipv6.conf.default.mc_forwarding = 0 net.ipv6.conf.eth0.mc_forwarding = 0 Run the following command to load the new setting: # /sbin/sysctl --load
Additional Identifiers
Rule ID: SV-239182r816670_rule
Vulnerability ID: V-239182
Group Title: SRG-OS-000480-GPOS-00227
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000366 |
The organization implements the security configuration settings. |
Controls
Number | Title |
---|---|
CM-6 |
Configuration Settings |