Microsoft Office/Word 2007 SP3/2010 SP2 memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

A vulnerability has been found in Microsoft Office and Word 2007 SP3/2010 SP2 (Office Suite Software) and classified as critical. Affected by this vulnerability is some unknown processing. 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 bug was discovered 11/14/2017. The weakness was released 11/14/2017 as KB4011266 as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. This vulnerability is known as CVE-2017-11854 since 07/31/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The advisory points out:

A remote code execution vulnerability exists in Microsoft Office software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

The vulnerability scanner Nessus provides a plugin with the ID 104557 (Security Updates for Microsoft Office Products (November 2017)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 110308 (Microsoft Office and Microsoft Office Services and Web Apps Security Update November 2017).

Applying the patch KB4011266 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 vulnerability database at Tenable (104557). Entries connected to this vulnerability are available at 109385, 109386, 109388 and 109391.

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CPE 2.3info

CPE 2.2info

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CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.4

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

NVD Base Score: 8.8
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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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EPSS Percentile: 🔍

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Nessus ID: 104557
Nessus Name: Security Updates for Microsoft Office Products (November 2017)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
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OpenVAS ID: 881695
OpenVAS Name: Microsoft Word 2007 Service Pack 3 Multiple Vulnerabilities (KB4011266)
OpenVAS File: 🔍
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Qualys ID: 🔍
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
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Patch: KB4011266

Timelineinfo

07/31/2017 🔍
11/14/2017 +106 days 🔍
11/14/2017 +0 days 🔍
11/14/2017 +0 days 🔍
11/14/2017 +0 days 🔍
11/14/2017 +0 days 🔍
11/14/2017 +0 days 🔍
11/15/2017 +1 days 🔍
01/23/2021 +1165 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: KB4011266
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-11854 (🔍)
OVAL: 🔍

SecurityTracker: 1039795
SecurityFocus: 101746 - Microsoft Word CVE-2017-11854 Memory Corruption Vulnerability

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Entryinfo

Created: 11/15/2017 10:56
Updated: 01/23/2021 16:12
Changes: 11/15/2017 10:56 (79), 12/06/2019 11:34 (5), 01/23/2021 16:12 (3)
Complete: 🔍

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