The system must provide protection for the TCP stack against connection resets, SYN, and data injection attacks.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECSC-1

Associated with: CCI-000032

SV-38701r1_rule The system must provide protection for the TCP stack against connection resets, SYN, and data injection attacks.

Vulnerability discussion

The tcp_tcpsecure parameter provides protection for TCP connections from fake SYN's, fake RST, and data injections on established connections. The first vulnerability involves sending a fake SYN to an established connection to abort the connection. The second vulnerability involves sending a fake RST to an established connection to abort the connection. The third vulnerability involves injecting fake data in an established TCP connection.

Check content

Fix text

Set the tcp_tcpsecure parameter to 7. # /usr/sbin/no -p -o tcp_tcpsecure=7

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.