Title

If Stream Control Transmission Protocol (SCTP) must be disabled on AIX. (Cat II impact)

Discussion

The Stream Control Transmission Protocol (SCTP) is an IETF-standardized transport layer protocol. This protocol is not yet widely used. Binding this protocol to the network stack increases the attack surface of the host. Unprivileged local processes may be able to cause the system to dynamically load a protocol handler by opening a socket using the protocol.

Check Content

Check the system to determine if SCTP is installed: # lslpp -L bos.net.sctp Fileset Level State Type Description (Uninstaller) ---------------------------------------------------------------------------- lslpp: 0504-132 Fileset bos.net.sctp not installed. If the "bos.net.sctp" fileset is not listed, SCTP is not installed, this is not a finding. If the "bos.net.sctp" fileset is listed then SCTP is installed, this is a finding.

Fix Text

If SCTP is installed, unload it from the kernel and uninstall it from the system using the following commands: # sctpctrl unload # installp -ug bos.net.sctp

Additional Identifiers

Rule ID: SV-215393r958480_rule

Vulnerability ID: V-215393

Group Title: SRG-OS-000096-GPOS-00050

Expert Comments

CCIs tied to check.

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