April 23, 2014

Microsoft fixes Internet Explorer zero-day vulnerability

microsoft logoMicrosoft has released eight security bulletins to address 26 different security vulnerabilities in a range of its products including Microsoft Windows, Internet Explorer, SharePoint, .NET Framework, Office, and Silverlight.

The most important patch fixes the zero-day exploit which has been used by attackers in the wild since mid-September. Microsoft reports that there have been targeted attacks aimed at Internet Explorer 8 and 9 however the vulnerability is present in all versions of IE from 6 to IE 11. The vulnerability exists because of a use-after-free coding error in the JavaScript SetMouseCapture implementation in Internet Explorer. Microsoft’s patch (MS13-080) changes “the way that Internet Explorer handles objects in memory” meaning Microsoft fixed the user-after-free bug. The patch is Critical and all users should ensure that it is applied (normally via Windows Update).

The next patch resolves a vulnerability in some Windows kernel-mode drivers, specifically how these drivers handle specially crafted OpenType and  TrueType Font (TTF) files. If exploited the vulnerabilities, which were reported to Microsoft privately, could allow remote code execution and an attacker could take complete control of an affected system. According to Microsoft these bugs exist in all supported releases of Microsoft Windows from XP upwards, except Windows 8.1, Windows Server 2012 R2, and Windows RT 8.1.

Windows is updated again in the next patch (MS13-083) to fix a vulnerability in the Windows Common Control Library that could allow remote code execution. The patch actually updates a fix from 2010 where Microsoft corrected the way in which the Windows common controls handle messages passed from a third-party scalable vector graphics (SVG) viewer. At the time it was rated as Important, but the new patch is rated as Critical for all supported 64-bit editions of Microsoft Windows. The update has no severity rating for Windows RT and for all supported 32-bit editions of Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7, and Windows 8.

The final Critical level bulletin (MS13-082) fixes two privately reported vulnerabilities and one publicly disclosed vulnerability in Microsoft’s .NET Framework. The worst of the vulnerabilities could allow remote code execution if a user visits a website containing a specially crafted OpenType font (OTF) file using a browser which is able to start XBAP applications. XBAP applications are Windows Presentation Foundation programs that run inside browsers such as Firefox or Internet Explorer. These applications run in a partial sandbox environment.

Microsoft October 2013-Priority.jpg-550x0

The remaining patches are rated as Important:

  • MS13-084 - Vulnerabilities in Microsoft SharePoint Server Could Allow Remote Code Execution. The most severe vulnerability could allow remote code execution if a user opens a specially crafted Office file in an affected version of Microsoft SharePoint Server, Microsoft Office Services, or Web Apps.
  • MS13-085 - Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution. The vulnerabilities could allow remote code execution if a user opens a specially crafted Office file with an affected version of Microsoft Excel or other affected Microsoft Office software.
  • MS13-086 - Vulnerabilities in Microsoft Word Could Allow Remote Code Execution. The vulnerabilities could allow remote code execution if a specially crafted file is opened in an affected version of Microsoft Word or other affected Microsoft Office software. An attacker who successfully exploited the vulnerabilities could gain the same user rights as the current user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
  • MS13-087 - Vulnerability in Silverlight Could Allow Information Disclosure. The vulnerability could allow information disclosure if an attacker hosts a website that contains a specially crafted Silverlight application that could exploit this vulnerability.

 

Microsoft patches Windows Kernel-Mode Driver vulnerability which is being exploited in the wild

microsoft logo(LiveHacking.Com) – Among the six Critical security bulletins issued by Microsoft, during its regular Patch Tuesday updates for July, was a fix for  CVE-2013-3660 a vulnerability in win32k.sys that allows remote code execution if a user views shared content that embeds TrueType font files. The vulnerability allows hackers to take complete control of an affected PC and Microsoft are reporting that it is being used in the wild in “limited, targeted attacks.”

The Windows Kernel-Mode Driver vulnerability, which affects all supported versions of Windows from XP SP2 on-wards (including Windows 8 and Windows 8 RT), exists because of an uninitialized pointer bug in the EPATHOBJ::pprFlattenRec function. The security patch fixes the way Windows handles specially crafted TrueType Font (TTF) files and by correcting the way that Windows handles objects in memory (in other words by fixing the uninitialized pointer bug).

The other five Critical bulletins also outline fixes for vulnerabilities which can lead to unauthorized remote code execution. MS13-052 fixes vulnerabilities in the Microsoft .NET Framework and Microsoft Silverlight, while MS13-054 addresses a vulnerability in Microsoft Windows, Microsoft Office, Microsoft Lync, and Microsoft Visual Studio – again connected with content that embeds TrueType font files.

There is also a cumulative security update for Internet Explorer. It resolves seventeen vulnerabilities in the browser. The most severe of these could allow remote code execution if a user views a specially crafted webpage. The security update is rated Critical for Internet Explorer 6, 7, 8, 9 and 10 on desktop versions of Windows and Moderate on Windows servers.

The only non-Critical patch was for a vulnerability in Windows Defender for Windows 7. The vulnerability could allow a hacker to gain elevated of privilege due to the way pathnames are used by Windows Defender, however an attacker must have valid logon credentials to exploit this vulnerability.

In total Microsoft addressed 34 vulnerabilities across its products. The software giant is recommending that system administrators who need to prioritize the role out of these patches should focus on the Windows Kernel-Mode Driver vulnerability and the updates to IE.

Microsoft Fixes Three Critical Issues

(LiveHacking.Com) – Microsoft has issued updates for May’s Patch Tuesday covering vulnerabilities in Microsoft Windows, Office, .NET Framework, and Silverlight. There are a total of seven security bulletins, three Critical and four Important, which address 23 issues.

The first of the Critical level updates is MS12-034, which affects Microsoft Office, Windows, .NET Framework, and Silverlight. This security update addresses 10 issues, the most severe of which could allow remote code execution if a user opens a specially crafted document or visits a malicious webpage that embeds TrueType font files.

Microsoft Word is also affected by another Critical issue that could allow remote code execution. MS12-029 addresses a privately reported vulnerability in the processing of RTF files. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

The third, and final, Critial level update, MS12-035, fixes two remote code execution vulnerabilities in the .NET Framework. The two privately reported vulnerabilities could allow remote code execution on a client system if a user views a specially crafted webpage using a web browser that can run XAML Browser Applications (XBAPs). Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

The remaining four bulletins are as follows:

  • MS12-030 – Vulnerabilities in Microsoft Office Could Allow Remote Code Execution - This security update resolves one publicly disclosed and five privately reported vulnerabilities in Microsoft Office. The vulnerabilities could allow remote code execution if a user opens a specially crafted Office file. An attacker who successfully exploited these vulnerabilities could gain the same user rights as the logged-on user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
  • MS12-031 - Vulnerability in Microsoft Visio Viewer 2010 Could Allow Remote Code Execution - This security update resolves a privately reported vulnerability in Microsoft Office. The vulnerability could allow remote code execution if a user opens a specially crafted Visio file. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
  • MS12-032 - Vulnerability in TCP/IP Could Allow Elevation of Privilege - This security update resolves one privately reported and one publicly disclosed vulnerability in Microsoft Windows. The more severe of these vulnerabilities could allow elevation of privilege if an attacker logs on to a system and runs a specially crafted application.
  • MS12-033 - Vulnerability in Windows Partition Manager Could Allow Elevation of Privilege – This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow elevation of privilege if an attacker logs on to a system and runs a specially crafted application. An attacker must have valid logon credentials and be able to log on locally to exploit this vulnerability.

 

Microsoft Fix 23 Security Issues in October’s Patch Tuesday

(LiveHacking.Com) - Microsoft has released its patches for Microsoft Windows, Internet Explorer, .NET Framework, Silverlight, Forefront United Access Gateway, and Microsoft Host Integration Server as part of October’s patch Tuesday.

There are two Critical level fixes, one for .NET Framework & Silverlight and the other for Internet Explorer:

MS11-078 – Vulnerability in .NET Framework and Microsoft Silverlight Could Allow Remote Code Execution. This security update resolves a privately reported vulnerability in Microsoft .NET Framework and Microsoft Silverlight. The vulnerability could allow remote code execution on a client system if a user views a specially crafted Web page using a Web browser that can run XAML Browser Applications (XBAPs) or Silverlight applications. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. The vulnerability could also allow remote code execution on a server system running IIS, if that server allows processing ASP.NET pages and an attacker succeeds in uploading a specially crafted ASP.NET page to that server and then executes the page, as could be the case in a Web hosting scenario. This vulnerability could also be used by Windows .NET applications to bypass Code Access Security (CAS) restrictions.

MS11-081 - Cumulative Security Update for Internet Explorer. This security update resolves eight privately reported vulnerabilities in Internet Explorer. The most severe vulnerabilities could allow remote code execution if a user views a specially crafted Web page using Internet Explorer. An attacker who successfully exploited any of these vulnerabilities could gain the same user rights as the local user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

The remaining advisories are all rated as Important:

  • MS11-075 - Vulnerability in Microsoft Active Accessibility Could Allow Remote Code Execution
  • MS11-076 - Vulnerability in Windows Media Center Could Allow Remote Code Execution
  • MS11-077 - Vulnerabilities in Windows Kernel-Mode Drivers Could Allow Remote Code Execution
  • MS11-079 - Vulnerabilities in Microsoft Forefront Unified Access Gateway Could Cause Remote Code Execution
  • MS11-080  - Vulnerability in Ancillary Function Driver Could Allow Elevation of Privilege
  • MS11-082 - Vulnerabilities in Host Integration Server Could Allow Denial of Service