what you don't know can hurt you

Microsoft Windows usp10.dll "GetFontDesc()" Integer Underflow

Microsoft Windows usp10.dll "GetFontDesc()" Integer Underflow
Posted Dec 10, 2015
Authored by Secunia, Hossein Lotfi | Site secunia.com

Secunia Research has discovered a vulnerability in Microsoft Windows, which can be exploited by malicious people to compromise a user's system. The vulnerability is caused due to an integer underflow error within the "GetFontDesc()" function in usp10.dll when processing font files cmap table and can be exploited to cause a heap-based buffer overflow via a font file containing cmap table data with specially crafted offset within encoding records. Successful exploitation allows execution of arbitrary code.

tags | advisory, overflow, arbitrary
systems | windows
advisories | CVE-2015-6130
SHA-256 | d65fab95536006f5a8a8545eff4d02524698f63bed04d5515fe21776d1ea97e1

Microsoft Windows usp10.dll "GetFontDesc()" Integer Underflow

Change Mirror Download
====================================================================== 

Secunia Research 08/12/2015

Microsoft Windows usp10.dll "GetFontDesc()"
Integer Underflow Vulnerability

======================================================================
Table of Contents

Affected Software....................................................1
Severity.............................................................2
Description of Vulnerability.........................................3
Solution.............................................................4
Time Table...........................................................5
Credits..............................................................6
References...........................................................7
About Secunia........................................................8
Verification.........................................................9

======================================================================
1) Affected Software


* Microsoft Windows 7
* Microsoft Windows Server 2008

======================================================================
2) Severity

Rating: Highly critical
Impact: System Access
Where: From remote

======================================================================
3) Description of Vulnerability

Secunia Research has discovered a vulnerability in Microsoft Windows,
which can be exploited by malicious people to compromise a user's
system.

The vulnerability is caused due to an integer underflow error within
the "GetFontDesc()" function in usp10.dll when processing font files
cmap table and can be exploited to cause a heap-based buffer overflow
via a font file containing cmap table data with specially crafted
offset within encoding records.

Successful exploitation allows execution of arbitrary code.

======================================================================
4) Solution

Apply update provided by MS15-130.

======================================================================
5) Time Table

09/10/2015 - Vendor notified.
12/10/2015 - Vendor response.
17/10/2015 - Status update provided by the vendor.
28/10/2015 - Vendor provides December 2015 as intended fix date.
08/12/2015 - Release of vendor patch and public disclosure.

======================================================================
6) Credits

Discovered by Hossein Lotfi, Secunia Research (now part of
Flexera Software).

======================================================================
7) References


The Common Vulnerabilities and Exposures (CVE) project has assigned
the CVE-2015-6130 identifier for the vulnerability.

======================================================================
8) About Secunia (now part of Flexera Software)

In September 2015, Secunia has been acquired by Flexera Software:

https://secunia.com/blog/435/

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://secunia.com/products/

Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private
individuals, who are interested in or concerned about IT-security.

http://secunia.com/advisories/

Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the
security and reliability of software in general:

http://secunia.com/secunia_research/

Secunia regularly hires new skilled team members. Check the URL below
to see currently vacant positions:

http://secunia.com/company/jobs/

======================================================================
9) Verification

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2015-6/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

======================================================================
Login or Register to add favorites

File Archive:

May 2022

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    May 1st
    0 Files
  • 2
    May 2nd
    15 Files
  • 3
    May 3rd
    19 Files
  • 4
    May 4th
    24 Files
  • 5
    May 5th
    15 Files
  • 6
    May 6th
    14 Files
  • 7
    May 7th
    0 Files
  • 8
    May 8th
    0 Files
  • 9
    May 9th
    13 Files
  • 10
    May 10th
    7 Files
  • 11
    May 11th
    99 Files
  • 12
    May 12th
    45 Files
  • 13
    May 13th
    7 Files
  • 14
    May 14th
    0 Files
  • 15
    May 15th
    0 Files
  • 16
    May 16th
    16 Files
  • 17
    May 17th
    26 Files
  • 18
    May 18th
    4 Files
  • 19
    May 19th
    17 Files
  • 20
    May 20th
    2 Files
  • 21
    May 21st
    0 Files
  • 22
    May 22nd
    0 Files
  • 23
    May 23rd
    6 Files
  • 24
    May 24th
    19 Files
  • 25
    May 25th
    5 Files
  • 26
    May 26th
    12 Files
  • 27
    May 27th
    12 Files
  • 28
    May 28th
    0 Files
  • 29
    May 29th
    0 Files
  • 30
    May 30th
    0 Files
  • 31
    May 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close