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Oracle PeopleSoft HCM 9.2 XXE Injection

Oracle PeopleSoft HCM 9.2 XXE Injection
Posted Apr 20, 2017
Authored by Nadya Krivdyuk

Oracle PeopleSoft HCM version 9.2 on PeopleTools version 8.55 suffers from an XML external entity injection vulnerability.

tags | exploit, xxe
advisories | CVE-2017-3548
SHA-256 | 6363b44c5b3ced6660487c0a4fe15d05600db5204a0187bd979e6984d878d6d5

Oracle PeopleSoft HCM 9.2 XXE Injection

Change Mirror Download
Application: Oracle PeopleSoft
Versions Affected: PeopleSoft HCM 9.2 on PeopleTools 8.55
Vendor URL: http://oracle.com
Bug: XXE
Reported: 23.12.2016
Vendor response: 24.12.2016
Date of Public Advisory: 18.04.2017
Reference: Oracle CPU April 2017
Author: Nadya Krivdyuk (ERPScan)


Description

1. ADVISORY INFORMATION
Title:[ERPSCAN-17-020] XXE VIA DOCTYPE in PeopleSoft
PeopleSoftServiceListeningConnector
Advisory ID: [ERPSCAN-17-020]
Risk: high
CVE: CVE-2017-3548
Advisory URL: https://erpscan.com/advisories/erpscan-17-020-xxe-via-doctype-peoplesoft/
Date published: 18.04.2017
Vendors contacted: Oracle


2. VULNERABILITY INFORMATION

Class: XXE
Impact: File disclosure, network discovery
Remotely Exploitable: yes
Locally Exploitable: no

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

A malicious user can modify an XML-based request to include XML
content that is then parsed locally.

4. VULNERABLE PACKAGES

PeopleSoft HCM 9.2 on PeopleTools 8.55

5. SOLUTIONS AND WORKAROUNDS

To correct this vulnerability, implement Oracle CPU April 2017

6. AUTHOR

Nadya Krivdyuk


7. TECHNICAL DESCRIPTION

An attacker can use an XML external entity vulnerability to send
specially crafted unauthorized XML requests, which will be processed
by the XML parser. The attacker can use an XML external entity
vulnerability for getting unauthorised access to the OS file system.

PoC


POST /PSIGW/PeopleSoftServiceListeningConnector HTTP/1.1
Host: 172.16.2.91:8000
Content-type: text/xml
<!DOCTYPE a PUBLIC "-//B/A/EN" "C:\windows">

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
aEmerging Vendora in Security by CRN, listed among aTOP 100 SAP
Solution providersa 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.

ERPScanas 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 afollow the suna 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.




Address USA: 228 Hamilton Avenue, Fl. 3, Palo Alto, CA. 94301

Phone: 650.798.5255

Twitter: @erpscan

Scoop-it: Business Application Security
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