Microsoft Office Excel 2003/2007/2010 Input Sanitizer File memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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9.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Office Excel 2003/2007/2010. It has been classified as critical. Impacted is an unknown function of the component Input Sanitizer. The manipulation as part of File leads to memory corruption. This vulnerability is referenced as CVE-2012-2543. Furthermore, an exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Microsoft Office Excel 2003/2007/2010 (Office Suite Software) and classified as critical. This issue affects an unknown code block of the component Input Sanitizer. The manipulation as part of a File leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Stack-based buffer overflow in Microsoft Excel 2007 SP2 and SP3 and 2010 SP1; Office 2011 for Mac; Excel Viewer; and Office Compatibility Pack SP2 and SP3 allows remote attackers to execute arbitrary code via a crafted spreadsheet, aka "Excel Stack Overflow Vulnerability."

The issue has been introduced in 11/17/2003. The weakness was published 11/13/2012 by Sean Larsson (TippingPoint) with Zero Day Initiative as MS12-076 as confirmed bulletin (Microsoft Technet). It is possible to read the advisory at technet.microsoft.com. The public release has been coordinated with Microsoft. The identification of this vulnerability is CVE-2012-2543 since 05/09/2012. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a private exploit is available.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 3284 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 62909 (MS12-076: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (2720184) (Mac OS X)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 110195 (Microsoft Excel Remote Code Execution Vulnerabilities (MS12-076)).

Applying the patch MS12-076 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 12612.

The vulnerability is also documented in the databases at X-Force (78075), Tenable (62909), SecurityFocus (BID 56431†), OSVDB (87273†) and Secunia (SA51242†). Similar entries are available at VDB-6933, VDB-6934 and VDB-62914. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 10.0
VulDB Temp Score: 9.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 62909
Nessus Name: MS12-076: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (2720184) (Mac OS X)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 902930
OpenVAS Name: Microsoft Office Remote Code Execution Vulnerabilities (2720184)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: MS12-076
TippingPoint: 🔍

McAfee IPS: 🔍
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PaloAlto IPS: 🔍

Timelineinfo

11/17/2003 🔍
05/09/2012 +3096 days 🔍
11/08/2012 +183 days 🔍
11/13/2012 +5 days 🔍
11/13/2012 +0 days 🔍
11/13/2012 +0 days 🔍
11/13/2012 +0 days 🔍
11/13/2012 +0 days 🔍
11/13/2012 +0 days 🔍
11/14/2012 +1 days 🔍
11/15/2012 +1 days 🔍
04/19/2021 +3077 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS12-076
Researcher: Sean Larsson (TippingPoint)
Organization: Zero Day Initiative
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2012-2543 (🔍)
GCVE (CVE): GCVE-0-2012-2543
GCVE (VulDB): GCVE-100-6935

OVAL: 🔍
IAVM: 🔍

X-Force: 78075
SecurityFocus: 56431 - Microsoft Excel CVE-2012-2543 Buffer Overflow Remote Code Execution Vulnerability
Secunia: 51242 - Microsoft Office Excel Multiple Vulnerabilities, Highly Critical
OSVDB: 87273
SecurityTracker: 1027752 - Microsoft Excel Buffer Overflow, Memory Corruption, and Use-After-Free Errors Let Remote Users Execute Arbitrary Code
Vulnerability Center: 37234 - [MS12-076] Microsoft Excel and Office Stack-Based Buffer Overflow Allows Remote Code Execution, Critical

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 11/15/2012 17:06
Updated: 04/19/2021 11:21
Changes: 11/15/2012 17:06 (96), 04/21/2017 11:31 (7), 04/19/2021 11:21 (2)
Complete: 🔍
Committer:
Cache ID: 216:69F:103

Be aware that VulDB is the high quality source for vulnerability data.

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