Microsoft Word 2003/2007/2010/2013/2016 Equation Editor memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

A vulnerability classified as critical was found in Microsoft Word 2003/2007/2010/2013/2016 (Word Processing Software). Affected by this vulnerability is an unknown code block of the component Equation Editor. 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:

Equation Editor in Microsoft Office 2003, Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016 allows a remote code execution vulnerability due to the way objects are handled in memory, aka "Microsoft Word Remote Code Execution Vulnerability". This CVE is unique from CVE-2018-0805, CVE-2018-0806, and CVE-2018-0807.

The bug was discovered 01/19/2018. The weakness was published 01/19/2018 with Qihoo 360 Vulcan Team as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. This vulnerability is known as CVE-2018-0862 since 12/01/2017. 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 105728 (Security Updates for Microsoft Office Products (January 2018)), 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 110310 (Microsoft Office and Microsoft Office Services and Web Apps Security Update January 2018).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (105728) and SecurityFocus (BID 102749†). Similar entries are available at VDB-111565, VDB-111566, VDB-111567 and VDB-111569.

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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
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NVD Base Score: 8.8
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Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 105728
Nessus Name: Security Updates for Microsoft Office Products (January 2018)
Nessus File: 🔍
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OpenVAS ID: 68663
OpenVAS Name: Microsoft Office 2007 Service Pack 3 Remote Code Execution Vulnerabilities (KB4011656)
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
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Timelineinfo

12/01/2017 🔍
01/10/2018 +40 days 🔍
01/19/2018 +9 days 🔍
01/19/2018 +0 days 🔍
01/19/2018 +0 days 🔍
01/19/2018 +0 days 🔍
01/22/2018 +3 days 🔍
01/23/2018 +1 days 🔍
08/18/2024 +2399 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: portal.msrc.microsoft.com
Researcher: Yuki Chen
Organization: Qihoo 360 Vulcan Team
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-0862 (🔍)
OVAL: 🔍

SecurityFocus: 102749 - Microsoft Office CVE-2018-0862 Memory Corruption Vulnerability

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Entryinfo

Created: 01/23/2018 08:00 AM
Updated: 08/18/2024 07:08 AM
Changes: 01/23/2018 08:00 AM (76), 12/29/2019 09:10 AM (5), 02/01/2021 01:33 PM (2), 08/18/2024 07:08 AM (17)
Complete: 🔍
Cache ID: 18:D7C:40

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