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Category:   OS (Microsoft)  >   Windows DLL (Any) Vendors:   Microsoft
Microsoft Uniscribe Integer Underflow in Processing Font Files Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1034337
SecurityTracker URL:  http://securitytracker.com/id/1034337
CVE Reference:   CVE-2015-6130   (Links to External Site)
Date:  Dec 8 2015
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 7 SP1, 2008 R2 SP1; and prior service packs
Description:   A vulnerability was reported in Microsoft Uniscribe. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create a specially crafted file that, when loaded by the target user, will trigger an integer underflow and execute arbitrary code on the target system. The code will run with the privileges of the target user.

Hossein Lotfi, Secunia Research (now part of Flexera Software) reported this vulnerability.

Impact:   A remote user can create a font file that, when loaded by the target user, will execute arbitrary code on the target user's system.
Solution:   The vendor has issued a fix.

Windows 7 for 32-bit Systems Service Pack 1:

https://www.microsoft.com/downloads/details.aspx?familyid=c3a31a90-3082-4d4f-9a8b-255398cd5e69

Windows 7 for x64-based Systems Service Pack 1:

https://www.microsoft.com/downloads/details.aspx?familyid=58c5d78d-5125-4e59-b9a0-b749f2871407

Windows Server 2008 R2 for x64-based Systems Service Pack 1:

https://www.microsoft.com/downloads/details.aspx?familyid=3364836f-3275-4ab1-aecc-79a25c08e9e2

Windows Server 2008 R2 for Itanium-based Systems Service Pack 1:

https://www.microsoft.com/downloads/details.aspx?familyid=f5b982bd-de83-4ff2-9203-f29489bd3f26

Windows Server 2008 R2 for x64-based Systems Service Pack 1:

https://www.microsoft.com/downloads/details.aspx?familyid=3364836f-3275-4ab1-aecc-79a25c08e9e2

The Microsoft advisory is available at:

https://technet.microsoft.com/library/security/ms15-130

Vendor URL:  technet.microsoft.com/library/security/ms15-130 (Links to External Site)
Cause:   Boundary error

Message History:   None.


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