{"description": "The system should not be acting as a network sniffer, which can\ncapture all traffic on the network to which it is connected. Run the following\nto determine if any interface is running in promiscuous mode:\n<pre>$ ip link | grep PROMISC</pre>\nPromiscuous mode of an interface can be disabled with the following command:\n<pre>$ sudo ip link set dev <tt>device_name</tt> multicast off promisc off</pre>", "rationale": "Network interfaces in promiscuous mode allow for the capture of all network traffic\nvisible to the system. If unauthorized individuals can access these applications, it\nmay allow them to collect information such as logon IDs, passwords, and key exchanges\nbetween systems.\n<br /><br />\nIf the system is being used to perform a network troubleshooting function, the use of these\ntools must be documented with the Information Systems Security Manager (ISSM) and restricted\nto only authorized personnel.", "severity": "medium", "references": {"cis-csc": ["1", "11", "14", "3", "9"], "cobit5": ["APO11.06", "APO12.06", "BAI03.10", "BAI09.01", "BAI09.02", "BAI09.03", "BAI10.01", "BAI10.02", "BAI10.03", "BAI10.05", "DSS01.05", "DSS04.05", "DSS05.02", "DSS05.05", "DSS06.06"], "isa-62443-2009": ["4.2.3.4", "4.3.3.3.7", "4.3.3.5.1", "4.3.3.5.2", "4.3.3.5.3", "4.3.3.5.4", "4.3.3.5.5", "4.3.3.5.6", "4.3.3.5.7", "4.3.3.5.8", "4.3.3.6.1", "4.3.3.6.2", "4.3.3.6.3", "4.3.3.6.4", "4.3.3.6.5", "4.3.3.6.6", "4.3.3.6.7", "4.3.3.6.8", "4.3.3.6.9", "4.3.3.7.1", "4.3.3.7.2", "4.3.3.7.3", "4.3.3.7.4", "4.3.4.3.2", "4.3.4.3.3", "4.4.3.4"], "isa-62443-2013": ["SR 1.1", "SR 1.10", "SR 1.11", "SR 1.12", "SR 1.13", "SR 1.2", "SR 1.3", "SR 1.4", "SR 1.5", "SR 1.6", "SR 1.7", "SR 1.8", "SR 1.9", "SR 2.1", "SR 2.2", "SR 2.3", "SR 2.4", "SR 2.5", "SR 2.6", "SR 2.7", "SR 7.6", "SR 7.8"], "iso27001-2013": ["A.11.1.2", "A.11.2.4", "A.11.2.5", "A.11.2.6", "A.12.1.2", "A.12.5.1", "A.12.6.2", "A.14.2.2", "A.14.2.3", "A.14.2.4", "A.16.1.6", "A.8.1.1", "A.8.1.2", "A.9.1.2"], "nist": ["CM-7(a)", "CM-7(b)", "CM-6(a)", "CM-7(2)", "MA-3"], "nist-csf": ["DE.DP-5", "ID.AM-1", "PR.IP-1", "PR.MA-1", "PR.PT-3"], "srg": ["SRG-OS-000480-GPOS-00227"], "ism": ["1409"], "pcidss4": ["1.4.5", "1.4"]}, "control_references": {"ism": ["1409"], "pcidss4": ["1.4.5", "1.4"]}, "components": [], "identifiers": {}, "ocil_clause": "any network device is in promiscuous mode", "ocil": "Verify that Promiscuous mode of an interface is disabled, run the following command:\n<pre>$ ip link | grep PROMISC</pre>", "oval_external_content": null, "fixtext": "Configure network interfaces to turn off promiscuous mode unless approved by the ISSO and documented.\n\nSet the promiscuous mode of an interface to off with the following command:\n\n$ sudo ip link set dev multicast off promisc off", "checktext": "", "vuldiscussion": "", "srg_requirement": "Ubuntu 22.04 network interfaces must not be in promiscuous mode.", "warnings": [], "conflicts": [], "requires": [], "policy_specific_content": {"stig": {"srg_requirement": "Ubuntu 22.04 network interfaces must not be in promiscuous mode.", "vuldiscussion": "Network interfaces in promiscuous mode allow for the capture of all network traffic visible to the system. If unauthorized individuals can access these applications, it may allow them to collect information such as logon IDs, passwords, and key exchanges between systems.\n\nIf the system is being used to perform a network troubleshooting function, the use of these tools must be documented with the information systems security officer (ISSO) and restricted to only authorized personnel.", "checktext": "Verify network interfaces are not in promiscuous mode with the following command:\n\n$ ip link | grep -i promisc\n\nIf network interfaces are found on the system in promiscuous mode and their use has not been approved by the ISSO and documented, this is a finding.", "fixtext": "Configure network interfaces to turn off promiscuous mode unless approved by the ISSO and documented.\n\nSet the promiscuous mode of an interface to off with the following command:\n\n$ sudo ip link set dev &lt;devicename&gt; multicast off promisc off"}}, "platform": "machine", "platforms": ["machine"], "sce_metadata": {}, "inherited_platforms": [], "cpe_platform_names": ["machine"], "inherited_cpe_platform_names": [], "bash_conditional": null, "fixes": {}, "title": "Ensure System is Not Acting as a Network Sniffer", "definition_location": "/aptdata/openscap/scap-security-guide/linux_os/guide/system/network/network_sniffer_disabled/rule.yml", "template": null}