Microsoft Office -/2003/2007/2010/2013 WordPerfect Document epsimp32.flt memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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9.5$0-$5k0.00

A vulnerability was found in Microsoft Office -/2003/2007/2010/2013 (Office Suite Software). It has been declared as very critical. Affected by this vulnerability is an unknown code block of the file epsimp32.flt of the component WordPerfect Document Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Stack-based buffer overflow in Microsoft Office 2003 SP3, 2007 SP3, 2010 SP1 and SP2, 2013, and 2013 RT allows remote attackers to execute arbitrary code via a crafted WordPerfect document (.wpd) file, aka "Word Stack Buffer Overwrite Vulnerability."

The issue has been introduced in 11/17/2003. The weakness was shared 11/12/2013 by Will Dormann with CERT/CC as MS13-091 as confirmed bulletin (Technet). The advisory is shared at technet.microsoft.com. The vendor cooperated in the coordination of the public release. This vulnerability is known as CVE-2013-1324 since 01/12/2013. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/02/2021).

The vulnerability was handled as a non-public zero-day exploit for at least 3648 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 70849 (MS13-091: Vulnerabilities in Microsoft Office Could Allow Remote Code Execution (2885093)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins. The commercial vulnerability scanner Qualys is able to test this issue with plugin 110225 (Microsoft Office Remote Code Execution Vulnerability (MS13-091)).

Applying the patch MS13-091 is able to eliminate this problem. The bugfix is ready for download at technet.microsoft.com. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 13165.

The vulnerability is also documented in the vulnerability database at Tenable (70849). Additional details are provided at support.microsoft.com. The entries 11146 and 11148 are related to this item.

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CPE 2.3info

CPE 2.2info

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CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.5

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
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CVSSv2info

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 70849
Nessus Name: MS13-091: Vulnerabilities in Microsoft Office Could Allow Remote Code Execution (2885093)
Nessus File: 🔍
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OpenVAS ID: 903414
OpenVAS Name: Microsoft Office Remote Code Execution Vulnerabilities (2885093)
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
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Patch: MS13-091
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Timelineinfo

11/17/2003 🔍
01/12/2013 +3344 days 🔍
11/12/2013 +304 days 🔍
11/12/2013 +0 days 🔍
11/12/2013 +0 days 🔍
11/12/2013 +0 days 🔍
11/13/2013 +1 days 🔍
11/15/2013 +2 days 🔍
06/02/2021 +2756 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS13-091
Researcher: Will Dormann
Organization: CERT/CC
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2013-1324 (🔍)
OVAL: 🔍
IAVM: 🔍

Vulnerability Center: 42267 - [MS13-091] Microsoft Office 2003 SP3, 2007 SP3, 2010 SP1 and 2013 Remote Code Execution due to Stack Buffer Overwrite, Critical
Secunia: 55539 - Microsoft Office Multiple WordPerfect Document Parsing Vulnerabilities, Highly Critical
OSVDB: 99651

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Entryinfo

Created: 11/15/2013 12:07
Updated: 06/02/2021 08:06
Changes: 11/15/2013 12:07 (54), 05/15/2017 11:22 (37), 06/02/2021 08:06 (2)
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