Microsoft Internet Explorer 9/10/11 Scripting Engine Object memory corruption

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

Summaryinfo

A vulnerability was found in Microsoft Internet Explorer 9/10/11. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component Scripting Engine. Such manipulation as part of Object leads to memory corruption. This vulnerability is documented as CVE-2017-8618. The attack can be executed remotely. Additionally, an exploit exists. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Microsoft Internet Explorer 9/10/11 (Web Browser). Affected by this issue is some unknown processing of the component Scripting Engine. The manipulation as part of a Object leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Internet Explorer in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 Internet Explorer in the way affected Microsoft scripting engines render when handling objects in memory, aka "Scripting Engine Memory Corruption Vulnerability." This CVE ID is unique from CVE-2017-8596, CVE-2017-8610, CVE-2017-8601, CVE-2017-8603, CVE-2017-8604, CVE-2017-8605, CVE-2017-8606, CVE-2017-8607, CVE-2017-8608, CVE-2017-8619, CVE-2017-9598 and CVE-2017-8609.

The bug was discovered 07/11/2017. The weakness was released 07/11/2017 with Microsoft as KB4025342 as confirmed security update guide (Website). The advisory is available at portal.msrc.microsoft.com. This vulnerability is handled as CVE-2017-8618 since 05/03/2017. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are unknown but a public exploit is available. The advisory points out:

A remote code execution vulnerability exists in the way that the VBScript engine, when rendered in Internet Explorer, handles objects in memory. In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit this vulnerability through Internet Explorer and then convince a user to view the website. An attacker could also embed an ActiveX control marked \"safe for initialization\" in an application or Microsoft Office document that hosts the Internet Explorer rendering engine. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit this vulnerability.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 101365 (Windows 8.1 and Windows Server 2012 R2 July 2017 Security Updates), 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 100315 (Microsoft Internet Explorer Security Update for July 2017).

Applying the patch KB4025342 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 Exploit-DB (42337), Tenable (101365) and SecurityFocus (BID 99399†). Entries connected to this vulnerability are available at VDB-103402, VDB-103417, VDB-103418 and VDB-103419. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 6.9

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.5
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
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Price Prediction: 🔍
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Nessus ID: 101365
Nessus Name: Windows 8.1 and Windows Server 2012 R2 July 2017 Security Updates
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802136
OpenVAS Name: Microsoft Windows Multiple Vulnerabilites (KB4025344)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
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Patch: KB4025342

Timelineinfo

05/03/2017 🔍
07/11/2017 +69 days 🔍
07/11/2017 +0 days 🔍
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07/11/2017 +0 days 🔍
07/11/2017 +0 days 🔍
07/11/2017 +0 days 🔍
07/12/2017 +1 days 🔍
12/23/2025 +3086 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: KB4025342
Researcher: Microsoft
Organization: Microsoft
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-8618 (🔍)
GCVE (CVE): GCVE-0-2017-8618
GCVE (VulDB): GCVE-100-103466

OVAL: 🔍

SecurityFocus: 99399 - Microsoft Internet Explorer CVE-2017-8618 Remote Code Execution Vulnerability
SecurityTracker: 1038848

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 07/12/2017 10:51
Updated: 12/23/2025 08:09
Changes: 07/12/2017 10:51 (95), 10/25/2019 09:21 (8), 01/01/2021 08:13 (2), 01/01/2021 08:19 (1), 12/23/2025 08:09 (15)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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