Microsoft Excel 2007 SP3/2010 SP2/2011/2016 Office Document memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

A vulnerability has been found in Microsoft Excel 2007 SP3/2010 SP2/2011/2016 (Spreadsheet Software) and classified as critical. Affected by this vulnerability is some unknown processing of the component Office 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:

Microsoft Excel 2007 SP3, Excel 2010 SP2, Excel 2013 SP1, Excel 2013 RT SP1, Excel for Mac 2011 and 2016, Office Compatibility Pack SP3, and Excel Viewer allow remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Memory Corruption Vulnerability."

The weakness was shared 09/08/2015 by Steven Vittitoe with Google Project Zero as MS15-099 as confirmed bulletin (Technet). The advisory is shared at technet.microsoft.com. This vulnerability is known as CVE-2015-2523 since 03/19/2015. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Google Security Research and been published 2 weeks after the advisory. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 85878 (MS15-099: Vulnerabilities in Microsoft Office Could Allow Remote Code Execution (3089664) (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 110259 (Microsoft Office Remote Code Execution Vulnerabilities (MS15-099)).

Applying the patch MS15-099 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 21011.

The vulnerability is also documented in the databases at Tenable (85878) and Exploit-DB (38214). The entries 77626, 77627, 77628 and 77646 are related to this item.

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CPE 2.3info

CPE 2.2info

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VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
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Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Google Security Research
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Nessus ID: 85878
Nessus Name: MS15-099: Vulnerabilities in Microsoft Office Could Allow Remote Code Execution (3089664) (Mac OS X)
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OpenVAS ID: 802074
OpenVAS Name: Microsoft Office Multiple Remote Code Execution Vulnerabilities-3089664 (Mac OS X)
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
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Patch: MS15-099
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Timelineinfo

03/19/2015 🔍
09/08/2015 +173 days 🔍
09/08/2015 +0 days 🔍
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09/08/2015 +0 days 🔍
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09/09/2015 +1 days 🔍
09/09/2015 +0 days 🔍
09/16/2015 +7 days 🔍
09/16/2015 +0 days 🔍
06/14/2022 +2463 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS15-099
Researcher: Steven Vittitoe
Organization: Google Project Zero
Status: Confirmed

CVE: CVE-2015-2523 (🔍)
SecurityTracker: 1033488
Vulnerability Center: 52520 - [MS15-099] Microsoft Office and Excel Remote Code Execution Vulnerability due to Memory Corruption - CVE-2015-2523, Critical
SecurityFocus: 76564 - Microsoft Office CVE-2015-2523 Memory Corruption Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013
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Entryinfo

Created: 09/09/2015 10:06
Updated: 06/14/2022 15:48
Changes: 09/09/2015 10:06 (66), 12/09/2017 12:05 (24), 06/14/2022 15:48 (3)
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