Microsoft Excel 2007/2010/2013/2016 memory corruption

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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 Excel 2007/2010/2013/2016 (Spreadsheet Software) and classified as critical. This vulnerability affects some unknown functionality. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. As an impact it is known to affect confidentiality, integrity, and availability.

The bug was discovered 01/09/2018. The weakness was presented 01/09/2018 by Omair working with Trend Micro's Zero Day Initiative. with Zero Day Initiative as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. This vulnerability was named CVE-2018-0796 since 12/01/2017. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/29/2021). 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 105694 (Security Updates for Microsoft Excel 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 local. 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 SecurityFocus (BID 102372), SecurityTracker (ID 1040153) and Tenable (105694). See 111561, 111562, 111563 and 111564 for similar entries.

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VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
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NVD Base Score: 8.8
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Exploitinginfoedit

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

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Current Price Estimation: 🔍

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Nessus ID: 105694
Nessus Name: Security Updates for Microsoft Excel Products (January 2018)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 801904
OpenVAS Name: Microsoft Excel 2010 Service Pack 2 RCE Vulnerability (KB4011660)
OpenVAS File: 🔍
OpenVAS Family: 🔍

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Qualys Name: 🔍

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Countermeasuresinfoedit

Recommended: Patch
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Patch: portal.msrc.microsoft.com

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12/01/2017 🔍
01/09/2018 +39 days 🔍
01/09/2018 +0 days 🔍
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01/10/2018 +1 days 🔍
01/29/2021 +1115 days 🔍

Sourcesinfoedit

Vendor: https://www.microsoft.com/

Advisory: portal.msrc.microsoft.com
Researcher: Omair working with Trend Micro's Zero Day Initiative.
Organization: Zero Day Initiative
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-0796 (🔍)
OVAL: 🔍

SecurityFocus: 102372 - Microsoft Excel CVE-2018-0796 Remote Code Execution Vulnerability
SecurityTracker: 1040153

See also: 🔍

Entryinfoedit

Created: 01/10/2018 02:18 PM
Updated: 01/29/2021 01:40 PM
Changes: (1) advisory_person_name
Complete: 🔍

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