Microsoft Word 2013 RT SP1/2013 SP1/2016 PDF File access control

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Microsoft Word 2013 RT SP1/2013 SP1/2016. The affected element is an unknown function of the component PDF File Handler. Executing a manipulation can lead to access control. The identification of this vulnerability is CVE-2018-8430. The attack may be launched remotely. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability has been found in Microsoft Word 2013 RT SP1/2013 SP1/2016 (Word Processing Software) and classified as critical. This vulnerability affects an unknown function of the component PDF File Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A remote code execution vulnerability exists in Microsoft Word if a user opens a specially crafted PDF file, aka "Word PDF Remote Code Execution Vulnerability." This affects Microsoft Word, Microsoft Office.

The bug was discovered 09/11/2018. The weakness was shared 09/11/2018 with Check Point as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. The vendor cooperated in the coordination of the public release. This vulnerability was named CVE-2018-8430 since 03/14/2018. 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 MITRE ATT&CK project declares the attack technique as T1068. The advisory points out:

A remote code execution vulnerability exists in Microsoft Word if a user opens a specially crafted PDF file. An attacker who successfully exploited the vulnerability could cause arbitrary code to execute in the context of the current user.

The vulnerability scanner Nessus provides a plugin with the ID 117426 (Security Updates for Microsoft Word Products (September 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 110323 (Microsoft Office and Microsoft Office Services and Web Apps Security Update September 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 (117426) and SecurityFocus (BID 105212†). The entries VDB-123828, VDB-123846, VDB-123859 and VDB-123860 are related to this item. Once again VulDB remains the best source for vulnerability data.

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CVSSv4info

VulDB Vector: 🔍
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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
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CVSSv2info

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Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 117426
Nessus Name: Security Updates for Microsoft Word Products (September 2018)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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Timelineinfo

03/14/2018 🔍
09/11/2018 +180 days 🔍
09/11/2018 +0 days 🔍
09/11/2018 +0 days 🔍
09/11/2018 +0 days 🔍
09/11/2018 +0 days 🔍
09/12/2018 +0 days 🔍
09/12/2018 +0 days 🔍
05/08/2023 +1699 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: portal.msrc.microsoft.com
Organization: Check Point
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2018-8430 (🔍)
GCVE (CVE): GCVE-0-2018-8430
GCVE (VulDB): GCVE-100-123844
SecurityFocus: 105212 - Microsoft Word PDF CVE-2018-8430 Remote Code Execution Vulnerability
SecurityTracker: 1041638

See also: 🔍

Entryinfo

Created: 09/12/2018 07:25
Updated: 05/08/2023 10:43
Changes: 09/12/2018 07:25 (77), 03/22/2020 15:08 (6), 05/08/2023 10:43 (4)
Complete: 🔍
Cache ID: 216::103

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