SAP: Session (Fixation) Attacks and Protections - Black Hat

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Session Fixation Discovery• Evaluate session tracking pre and postauthentication(and compare)– Identify the session ID transport or exchangemechanism (web interception proxy)– Get a valid session ID (pre/post-authentication)– Fix the session ID playing the victim user role– Authenticate into the target web-app– Analyze the response post-authenticationSame session ID, or no session ID, in the response?Copyright © 2011 Taddong S.L. www.taddong.com10
Session ID Exchange (1)• Multiple mechanisms are available inHTTP to maintain session state• Session ID sent as a…– Cookie (standard HTTP header)– URL parameter (URL rewritting) – RFC 2396– URL argument: GET request (URL rewriting)– Body argument: POST request– Hidden form field (HTML forms)– Proprietary HTTP headerCopyright © 2011 Taddong S.L. www.taddong.com11
Page 1 and 2: UPDATEDwww.taddong.comSAP: Session
Page 3 and 4: Sessions in Web Applications• A w
Page 5 and 6: OWASP Top 10 2010• The Top 10 Mos
Page 7 and 8: WASC Threat Clasification v2.0• W
Page 9: What Session Fixation Should Be?Obs
Page 13 and 14: Session ID ExchangeUsed vs. Accepte
Page 15 and 16: The Attacker is After the…http://
Page 17 and 18: Session Fixation Attackshttp://www.
Page 19 and 20: Attack Vectors (2)• Web traffic i
Page 21 and 22: Attack Vectors (4)• Cross-Site Sc
Page 23 and 24: Session Fixation ExploitationSummar
Page 25 and 26: Three Case Studies• From real-wor
Page 27 and 28: Case Study #1Joomla! Open-Source CM
Page 29 and 30: #1 Discovery and Exploitation• Ta
Page 31 and 32: #1 Vulnerability Disclosure Timelin
Page 33 and 34: Case Study #2Commercial Web Applica
Page 35 and 36: #2 Discovery and Exploitation (1)
Page 39 and 40: #2 Impact• Three possible scenari
Page 41 and 42: WebLogic HTTPS Enforcement (2)• H
Page 43 and 44: #2 Vulnerability Disclosure Timelin
Page 45 and 46: #2 Protections (2)HTTPS Secure Cook
Page 47 and 48: #2 Protections (4)WebLogic Session
Page 49 and 50: #2 Protections (6)Summary• Too ma
Page 51 and 52: #2 Protections (8)Industry standard
Page 53 and 54: #3 Summary• Session fixation in t
Page 57 and 58: #3 Discovery and Exploitation (4)Co
Page 61 and 62:
#3 Impact (1)• Hijack any SAP use
Page 63 and 64:
#3 Impact (2)• Direct impact of s
Page 65 and 66:
#3 Vulnerability Disclosure Timelin
Page 67 and 68:
SAP Disclosure Guidelines (1)• SA
Page 69 and 70:
#3 Protections (1)• Monthly Patch
Page 71 and 72:
#3 Protections (3)• Use HTTPS-onl
Page 73 and 74:
ConclusionsCopyright © 2011 Taddon
Page 75 and 76:
Conclusions (1)• Session fixation
Page 77 and 78:
Conclusions (3)• Impact on the we
Page 79 and 80:
Questions? Copyright © 2011 Taddon
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SAP: Session (Fixation) Attacks and Protections - Black Hat

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