Microsoft Excel up to 2016 memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Excel 2007 SP3/2010 SP2/2013 RT SP1/2013 SP1/2016. It has been declared as critical. The impacted element is an unknown function. The manipulation results in memory corruption. This vulnerability is identified as CVE-2017-8632. The attack can be executed remotely. There is not any exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Microsoft Excel 2007 SP3/2010 SP2/2013 RT SP1/2013 SP1/2016 (Spreadsheet Software). It has been classified as critical. Affected is some unknown processing. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A remote code execution vulnerability exists in Microsoft Excel 2010 Service Pack 2, Microsoft Excel 2013 Service Pack 1, Microsoft Excel 2013 RT Service Pack 1, Microsoft Excel 2016, Microsoft Office Web Apps 2013, Microsoft Excel for Mac 2011, Microsoft Excel 2016 for Mac, and Microsoft Office Compatibility Pack Service Pack 3, when they fail to properly handle objects in memory, aka "Microsoft Office Memory Corruption Vulnerability". This CVE ID is unique from CVE-2017-8630, CVE-2017-8631, and CVE-2017-8744.

The bug was discovered 09/12/2017. The weakness was released 09/12/2017 as KB4011108 as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. This vulnerability is traded as CVE-2017-8632 since 05/03/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The advisory points out:

A remote code execution vulnerability exists in Microsoft Office software when it fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could use a specially crafted file to perform actions in the security context of the current user. For example, the file could then take actions on behalf of the logged-on user with the same permissions as the current user. Exploitation of this vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Office software.

The vulnerability scanner Nessus provides a plugin with the ID 103126 (Security Update for Microsoft Office (September 2017) (macOS)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 110303 (Microsoft Office and Microsoft Office Services and Web Apps Security Update September 2017).

Applying the patch KB4011108 is able to eliminate this problem. The bugfix is ready for download at catalog.update.microsoft.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (103126) and SecurityFocus (BID 100734†). Entries connected to this vulnerability are available at VDB-106482, VDB-106470, VDB-106473 and VDB-106474. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 103126
Nessus Name: Security Update for Microsoft Office (September 2017) (macOS)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802136
OpenVAS Name: Microsoft Excel 2013 Service Pack 1 Multiple Vulnerabilities (KB4011108)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Patch: KB4011108

Timelineinfo

05/03/2017 🔍
09/12/2017 +132 days 🔍
09/12/2017 +0 days 🔍
09/12/2017 +0 days 🔍
09/12/2017 +0 days 🔍
09/12/2017 +0 days 🔍
09/12/2017 +0 days 🔍
09/13/2017 +1 days 🔍
01/11/2021 +1216 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: KB4011108
Researcher: Jaanus Kääp
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-8632 (🔍)
GCVE (CVE): GCVE-0-2017-8632
GCVE (VulDB): GCVE-100-106476

OVAL: 🔍

SecurityFocus: 100734 - Microsoft Office CVE-2017-8632 Remote Code Execution Vulnerability
SecurityTracker: 1039315

See also: 🔍

Entryinfo

Created: 09/13/2017 13:07
Updated: 01/11/2021 19:06
Changes: 09/13/2017 13:07 (74), 11/15/2019 14:28 (11), 01/11/2021 19:02 (2), 01/11/2021 19:06 (1)
Complete: 🔍
Cache ID: 216::103

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