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3299 - Pentesting SAPRouter

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PORT     STATE SERVICE    VERSION
3299/tcp open  saprouter?

This is a summary of the post from https://blog.rapid7.com/2014/01/09/piercing-saprouter-with-metasploit/arrow-up-right

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Understanding SAProuter Penetration with Metasploit

SAProuter acts as a reverse proxy for SAP systems, primarily to control access between the internet and internal SAP networks. It's commonly exposed to the internet by allowing TCP port 3299 through organizational firewalls. This setup makes SAProuter an attractive target for penetration testing because it might serve as a gateway to high-value internal networks.

Scanning and Information Gathering

Initially, a scan is performed to identify if a SAP router is running on a given IP using the sap_service_discovery module. This step is crucial for establishing the presence of a SAP router and its open port.

msf> use auxiliary/scanner/sap/sap_service_discovery
msf auxiliary(sap_service_discovery) > set RHOSTS 1.2.3.101
msf auxiliary(sap_service_discovery) > run

Following the discovery, further investigation into the SAP router's configuration is carried out with the sap_router_info_request module to potentially reveal internal network details.

msf auxiliary(sap_router_info_request) > use auxiliary/scanner/sap/sap_router_info_request 
msf auxiliary(sap_router_info_request) > set RHOSTS 1.2.3.101
msf auxiliary(sap_router_info_request) > run

Enumerating Internal Services

With obtained internal network insights, the sap_router_portscanner module is used to probe internal hosts and services through the SAProuter, allowing a deeper understanding of internal networks and service configurations.

This module's flexibility in targeting specific SAP instances and ports makes it an effective tool for detailed internal network exploration.

Advanced Enumeration and ACL Mapping

Further scanning can reveal how Access Control Lists (ACLs) are configured on the SAProuter, detailing which connections are allowed or blocked. This information is pivotal in understanding security policies and potential vulnerabilities.

Blind Enumeration of Internal Hosts

In scenarios where direct information from the SAProuter is limited, techniques like blind enumeration can be applied. This approach attempts to guess and verify the existence of internal hostnames, revealing potential targets without direct IP addresses.

Leveraging Information for Penetration Testing

Having mapped the network and identified accessible services, penetration testers can utilize Metasploit's proxy capabilities to pivot through the SAProuter for further exploration and exploitation of internal SAP services.

Conclusion

This approach underscores the importance of secure SAProuter configurations and highlights the potential for accessing internal networks through targeted penetration testing. Properly securing SAP routers and understanding their role in network security architecture is crucial for protecting against unauthorized access.

For more detailed information on Metasploit modules and their usage, visit Rapid7's databasearrow-up-right.

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References

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Shodan

  • port:3299 !HTTP Network packet too big

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