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Coastal Network Status - Issue Detail
Security
Alert

Vulnerability in Windows Kernel-Mode Drivers Could Allow Remote Code Execution
Posted: November 16, 2012, 8:58 am
Last Updated: December 23, 2012, 11:20 am

South Carolina Information Sharing and Analysis Center

 

SC INFORMATION SHARING AND ANALYSIS CENTER BULLETIN

 

DATE ISSUED:        11/15/2012

                                               

SUBJECT:     Vulnerability in Windows Kernel-Mode Drivers Could Allow Remote Code Execution

 

OVERVIEW:

 

Three vulnerabilities have been discovered in Microsoft Windows Kernel-Mode drivers that could allow for remote code execution. The kernel mode driver’s controls window displays, screen output, and input from devices that the kernel passes to applications. Exploitation of these vulnerabilities could result in the execution of arbitrary code with full system privileges resulting in full control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full system rights.

 

DESCRIPTION:

 

Three vulnerabilities have been identified in Microsoft Windows Kernel-Mode driver (win32.sys) that could allow for code execution.  The details of the vulnerabilities are as follows:

 

Win32k Use-After Free Vulnerability:

Two of the vulnerabilities are elevation of privilege vulnerabilities that are due to the way the Windows kernel mode driver handles objects in memory.  In order for successful exploitation to occur, an attacker must have valid logon credentials and be able to logon locally.  Then, an attacker could run a specially crafted application and take complete control over the affected system.

 

TrueType Font Parsing Vulnerability:

The third vulnerability is caused when Windows font parsing improperly handles objects in memory. This vulnerability can be exploited by visiting a specially crafted webpage or opening a specially crafted file, such as an email attachment. In an email scenario the attacker would need the user to open an attachment or click a link to a specially crafted webpage.

 

Successful exploitation of any of these vulnerabilities could result in an attacker gaining the ability to install programs; view, change, or delete data; or create new accounts with full administrative rights.

 

SYSTEMS AFFECTED:

·          Windows XP

·         Windows Server 2003

·         Windows Vista

·         Windows Server 2008

·         Windows 7

·         Windows 8

·         Windows Server 2012

·         Windows RT

 

 RISK:

Government:

  • Large and medium government entities: High
  • Small government entities: High

 

Businesses:

  • Large and medium business entities: High
  • Small business entities: High 

 

Home users: High

 

RECOMMENDATIONS:

We recommend the following actions be taken:

 

  • Apply appropriate patches provided by Microsoft to vulnerable systems immediately after appropriate testing.
  • Remind users not to visit un-trusted websites or follow links provided by unknown or un-trusted sources.
  • Remind users not to open e-mail attachments from unknown users or suspicious e-mails from trusted sources.
  • Remind users not to download or open files from un-trusted websites.
  • Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.

 

REFERENCES:

Microsoft:

 

http://technet.microsoft.com/en-us/security/bulletin/ms12-075

 

CVE:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2530

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2553

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2897

 

SecurityFocus:

http://www.securityfocus.com/bid/56457

http://www.securityfocus.com/bid/56448

http://www.securityfocus.com/bid/56447

 

 

 

Please feel free to contact the SC ISAC if you have any questions or need any additional information.

 

The SC ISAC will provide amplifying information as it becomes available.

 

SC-ISAC Contact Information

 

Email: SC-ISAC@cio.sc.gov

SC ISAC Security Line: 803-896-1650

24-hour hotline: +1 803-896-0001

Fax: +1 803-896-0375

Postal address:

 

SC-ISAC

DSIT Budget and Control Board

4430 Broad River Road

Columbia S.C. 29210

SC-ISAC is available via hotline 08:00-17:00 EST (GMT-5)/ EDT (GMT-4)

Monday through Friday

 

Using Encryption

 

We strongly urge you to encrypt sensitive information sent by email. Our

public PGP key is available from:

 

https://sc-isac.sc.gov/public.key

 

NO WARRANTY

 

Any material furnished by SC-ISAC is furnished on an "as is" basis.

 

SC-ISAC makes no warranties of any kind, either expressed or implied as to

any matter including, but not limited to, warranty of fitness for a particular

purpose or merchantability, exclusivity or results obtained from use of the

material. SC-ISAC does not make any warranty of any kind with respect to

freedom from patent, trademark, or copyright infringement.

 

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