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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.2067 Microsoft Security Bulletin MS15-082: Vulnerabilities in RDP Could Allow Remote Code Execution (3080348) 12 August 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Microsoft Windows Publisher: Microsoft Operating System: Windows Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Provide Misleading Information -- Remote with User Interaction Unauthorised Access -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2015-2473 CVE-2015-2472 Original Bulletin: https://technet.microsoft.com/en-us/library/security/MS15-082 - --------------------------BEGIN INCLUDED TEXT-------------------- Microsoft Security Bulletin MS15-082: Vulnerabilities in RDP Could Allow Remote Code Execution (3080348) Bulletin Number: MS15-082 Bulletin Title: Vulnerabilities in RDP Could Allow Remote Code Execution Severity: Important KB Article: 3080348 Version: 1.0 Published Date: August 11, 2015 Executive Summary This security update resolves vulnerabilities in Microsoft Windows. The most severe of the vulnerabilities could allow remote code execution if an attacker first places a specially crafted dynamic link library (DLL) file in the target users current working directory and then convinces the user to open a Remote Desktop Protocol (RDP) file or to launch a program that is designed to load a trusted DLL file but instead loads the attackers specially crafted DLL file. An attacker who successfully exploited the vulnerabilities could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. This security update is rated Important for all supported releases of Microsoft Window except Windows 10, which is not affected. For more information, see the Affected Software section. Affected Software Windows Vista Windows Vista Service Pack 2 Windows Vista Service Pack 2 [1] Windows Vista x64 Edition Service Pack 2 Windows Vista x64 Edition Service Pack 2 [1] Windows Server 2008 Windows Server 2008 for 32-bit Systems Service Pack 2 Windows Server 2008 for x64-based Systems Service Pack 2 Windows Server 2008 for Itanium-based Systems Service Pack 2 Windows 7 Windows 7 for 32-bit Systems Service Pack 1 Windows 7 for 32-bit Systems Service Pack 1 [2] Windows 7 for 32-bit Systems Service Pack 1 [3] Windows 7 for x64-based Systems Service Pack 1 Windows 7 for x64-based Systems Service Pack 1 [2] Windows 7 for x64-based Systems Service Pack 1 [3] Windows Server 2008 R2 Windows Server 2008 R2 for x64-based Systems Service Pack 1 Windows Server 2008 R2 for x64-based Systems Service Pack 1 [2] Windows Server 2008 R2 for x64-based Systems Service Pack 1 [3] Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 Windows 8 and Windows 8.1 Windows 8 for 32-bit Systems Windows 8 for x64-based Systems Windows 8.1 for 32-bit Systems Windows 8.1 for x64-based Systems Windows Server 2012 and Windows Server 2012 R2 Windows Server 2012 Windows Server 2012 R2 Windows RT and Windows RT 8.1 Windows RT[4] Windows RT 8.1[4] Server Core installation option Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) Windows Server 2012 (Server Core installation) Windows Server 2012 R2 (Server Core installation) [1]Customers running RDP 7.0 on supported editions of Windows Vista need only install update 3075221. See the Update FAQ for more information. [2]Customers running RDP 8.0 on supported editions of Windows 7 or Windows Server 2008 R2 need only install update 3075222. See the Update FAQ for more information. [3]Customers running RDP 8.1 on supported editions of Windows 7 or Windows Server 2008 R2 need only install update 3075226. See the Update FAQ for more information. [4]This update is available via Windows Update only. Vulnerability Information Remote Desktop Session Host Spoofing Vulnerability - CVE-2015-2472 A spoofing vulnerability exists when the Remote Desktop Session Host (RDSH) improperly validates cerficates during authentication. An attacker who successfully exploited this vulnerability could impersonate the client session. To exploit the vulnerability, in a man-in-the-middle (MiTM) attack an attacker could generate an untrusted certificate that matches the issuer name and serial number of the trusted certificates. The update addresses the vulnerability by correcting how RDSH validates certificates. Microsoft received information about this vulnerability through coordinated vulnerability disclosure. When this security bulletin was issued, Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers. Remote Desktop Protocol DLL Planting Remote Code Execution Vulnerability - CVE-2015-2473 A remote code execution vulnerability exists when Microsoft Windows Remote Desktop Protocol client improperly handles the loading of certain specially crafted DLL files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. To exploit this vulnerability, an attacker would first have to place a specially crafted DLL file in the target users current working directory and then convince the user to open a specially crafted RDP file. In a web-based attack scenario an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted RDP file that is designed to exploit the vulnerability. An attacker would have no way to force the user to visit the website. Instead, an attacker would have to convince the user to click a link, typically by way of an enticement in an email or Instant Messenger message. The update addresses the vulnerability by correcting how the Windows RDP client loads certain binaries. Microsoft received information about this vulnerability through coordinated vulnerability disclosure. When this security bulletin was issued, Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBVcqIT36ZAP0PgtI9AQI+GxAAurYqanhdhKYLKPEWpu/gFy1ZqCcmGrov 1aJmbCNiZSiflV2s4sIHhgJ/03zn74t4lw6GwHn+5Pf+rGbuk4kSmcYCvHpPxjho XyReWRC6/dLeUu+dfs02w0bprL3pvehfjGy+kt8XzDqhcFMqz5nZUVKEKbAwkw+i jMcLLDpFUEmLqlklDJOTm6Gf+CpdbMsLtm56Iwx+jRpV3cAA8wWpDO3AevBLD/0g YUxfujKU51cKD+lE77PcKTI3jLGxTKzA7detSC/xDu+nHJ5veXnRA0MBDOEqAkWV f9f8poPnj5Q9R+Um00fWbjqseXJxFCl7xSOYh6PZXpFpvW3dkc3zKkZgmuZCRlgt K4932xdV+VYMqQgbr2GPpJB5xRR4hYrNzbWCywDgT4yxOLQ4yWbQ4YXuptMVcYOO 7E0JbZ71FmoFScsVxJbIkGVGH/CPmyzcDwJ6vFUn68uj4A9n+CU9u8qR5dbMc5KN okez6COMPzYtp93qAe+/Oj5xV4w2bzM++PavdPcurTSxcMhfQsMZe1YzyRLRReTb Q7lq2vDmzybOKoz/vJHRuSRN0OQxfZtoV2JW0tY14iPfmfFNMxirm3vOVKyuxSR9 x1jVi7x36V9jUAVAIlmG16u6AQq+E0hYTv2MrUe//TEiew2KPgXPFyp+8ciwuW3f 73HQ+VhJ/84= =Sorp -----END PGP SIGNATURE-----