210 lines
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5.6 KiB
Text
210 lines
No EOL
5.6 KiB
Text
Application: SAP NetWeaver AS JAVA
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Versions Affected: SAP NetWeaver AS JAVA 7.1 - 7.5
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Vendor URL: http://SAP.com
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Bug: Directory traversal
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Sent: 29.09.2015
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Reported: 29.09.2015
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Vendor response: 30.09.2015
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Date of Public Advisory: 08.03.2016
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Reference: SAP Security Note 2234971
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Author: Vahagn Vardanyan (ERPScan)
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Description
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1. ADVISORY INFORMATION
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Title: [ERPSCAN-16-012] SAP NetWeaver AS Java directory traversal vulnerability
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Advisory ID: [ERPSCAN-16-012]
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Risk: medium
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Advisory URL: https://erpscan.com/advisories/erpscan-16-012/
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Date published: 08.03.2016
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Vendors contacted: SAP
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2. VULNERABILITY INFORMATION
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Class: directory traversal
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Impact: remotely read file from server
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Remotely Exploitable: Yes
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Locally Exploitable: No
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CVE-2016-3976
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CVSS Information
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CVSS Base Score v3: 7.5 / 10
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CVSS Base Vector:
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AV : Attack Vector (Related exploit range) Network (N)
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AC : Attack Complexity (Required attack complexity) Low (L)
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PR : Privileges Required (Level of privileges needed to exploit) None (N)
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UI : User Interaction (Required user participation) None (N)
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S : Scope (Change in scope due to impact caused to components beyond
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the vulnerable component) Changed (C)
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C : Impact to Confidentiality Low (L)
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I : Impact to Integrity None (N)
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A : Impact to Availability None (N)
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3. VULNERABILITY DESCRIPTION
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An authorized attacker can use a special request to read files from
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the server and then escalate his or her privileges.
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4. VULNERABLE PACKAGES
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SAP NetWeaver AS JAVA 7.1 - 7.5
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Other versions are probably affected too, but they were not checked.
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5. SOLUTIONS AND WORKAROUNDS
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To correct this vulnerability, install SAP Security Note 2234971
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6. AUTHOR
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Vahagn Vardanyan (ERPScan)
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7. TECHNICAL DESCRIPTION
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An attacker can use an SAP NetWeaver function CrashFileDownloadServlet
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to read files from the server.
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PoC
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GET /XXX/CrashFileDownloadServlet?fileName=..\security\data\SecStore.key
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Disclaimer: According to the partnership agreement between ERPScan and
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SAP, our company is not entitled to publish any detailed information
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about detected vulnerabilities before SAP releases a patch. After the
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release, SAP suggests respecting an implementation time of three
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months and asks security researchers to not to reveal any details
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during this time. However, In this case, the vulnerability allows an
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attacker to read arbitrary files on a remote server, possibly
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disclosing confidential information, and many such services are
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exposed to the Internet. As responsible security researchers, ERPScan
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team made a decision not to disseminate the full PoC even after the
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specified time.
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8. REPORT TIMELINE
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Send: 29.09.2015
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Reported: 29.09.2015
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Vendor response: 30.09.2015
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Date of Public Advisory: 08.03.2016
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9. REFERENCES
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https://erpscan.com/advisories/erpscan-16-012/
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10. ABOUT ERPScan Research
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The company’s expertise is based on the research subdivision of
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ERPScan, which is engaged in vulnerability research and analysis of
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critical enterprise applications. It has achieved multiple
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acknowledgments from the largest software vendors like SAP, Oracle,
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Microsoft, IBM, VMware, HP for discovering more than 400
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vulnerabilities in their solutions (200 of them just in SAP!).
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ERPScan researchers are proud to have exposed new types of
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vulnerabilities (TOP 10 Web Hacking Techniques 2012) and to be
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nominated for the best server-side vulnerability at BlackHat 2013.
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ERPScan experts have been invited to speak, present, and train at 60+
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prime international security conferences in 25+ countries across the
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continents. These include BlackHat, RSA, HITB, and private SAP
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trainings in several Fortune 2000 companies.
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ERPScan researchers lead the project EAS-SEC, which is focused on
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enterprise application security research and awareness. They have
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published 3 exhaustive annual award-winning surveys about SAP
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security.
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ERPScan experts have been interviewed by leading media resources and
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featured in specialized info-sec publications worldwide. These include
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Reuters, Yahoo, SC Magazine, The Register, CIO, PC World, DarkReading,
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Heise, and Chinabyte, to name a few.
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We have highly qualified experts in staff with experience in many
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different fields of security, from web applications and
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mobile/embedded to reverse engineering and ICS/SCADA systems,
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accumulating their experience to conduct the best SAP security
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research.
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11. ABOUT ERPScan
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ERPScan is the most respected and credible Business Application
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Security provider. Founded in 2010, the company operates globally and
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enables large Oil and Gas, Financial and Retail organizations to
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secure their mission-critical processes. Named as an ‘Emerging Vendor’
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in Security by CRN, listed among “TOP 100 SAP Solution providers” and
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distinguished by 30+ other awards, ERPScan is the leading SAP SE
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partner in discovering and resolving security vulnerabilities. ERPScan
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consultants work with SAP SE in Walldorf to assist in improving the
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security of their latest solutions.
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ERPScan’s primary mission is to close the gap between technical and
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business security, and provide solutions to evaluate and secure SAP
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and Oracle ERP systems and business-critical applications from both,
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cyber-attacks as well as internal fraud. Usually our clients are large
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enterprises, Fortune 2000 companies and managed service providers
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whose requirements are to actively monitor and manage security of vast
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SAP landscapes on a global scale.
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We ‘follow the sun’ and function in two hubs, located in the Palo Alto
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and Amsterdam to provide threat intelligence services, agile support
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and operate local offices and partner network spanning 20+ countries
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around the globe. |