SAP PCo agent - DoS vulnerability

Application: SAP PCoVendor:<http://www.sap.com>**Bugs:DoSReported:05.09.2015Vendor response:06.09.2015Date of Public Advisory:20.11.2015Reference:**SAP Security Note 2238619**Author: ** Mathieu GELI (ERPScan)

VULNERABILITY INFORMATION

Class: Denial of service
Impact: Disrupt operational status
Remotely Exploitable: Yes
Locally Exploitable: Yes
CVE Name: CVE-2015-8330
CVSS Information
CVSS Base Score: 7.1 / 10
CVSS Base Vector:

Business risk

It is possible to use denial of service to terminate the process of the vulnerable component. As a result, nobody can use this service, which has a negative influence on business processes. System downtime also harms business reputation.

Description

An attacker can crash the PCo agent by forging xMII requests to the TCP port.

VULNERABLE PACKAGES

SAP PCo agent 2.2, 2.3, 15.0 and 15.1
Other versions are probably affected too, but they were not checked.

SOLUTIONS AND WORKAROUNDS

To correct this vulnerability, install SAP Security Note 2238619

TECHNICAL DESCRIPTION

When sending special forged queries to the SAP Pco Agent (available in query mode), you can crash the agent and disrupt a PCo operation.

Proof of concept

Send to port 9000 (or to which is configured as the query port in the PCo Agent configuration) the following:

<?xml version=“1.0” encoding=“UTF-8”?>pco:tag<![CDATA[CALL ‘AAA[…60000…]AAA’;]]/pco:tag/pco:request

1

|

<?xml version=“1.0” encoding=“UTF-8”?>pco:tag<![CDATA[CALL ‘AAA[…60000…]AAA’;]]/pco:tag/pco:request

—|—

Defense

To prevent this issue as well as a plethora of other vulnerabilities that may affect your systems, ERPScan provides the following services:

• SAP Vulnerability Assessment
• SAP Security Assessment
• SAP Security Trainings
• ABAP Code Security Review
• SAP Penetration testing