Описание
Scripting Engine Memory Corruption Vulnerability
A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Internet Explorer and then convince a user to view the website, for example, by sending an email.
The security update addresses the vulnerability by modifying how the scripting engine handles objects in memory.
Меры по смягчению последствий
By default, Internet Explorer on Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 and Windows Server 2019 runs in a restricted mode that is known as Enhanced Security Configuration. Enhanced Security Configuration is a group of preconfigured settings in Internet Explorer that can reduce the likelihood of a user or administrator downloading and running specially crafted web content on a server. This is a mitigating factor for websites that you have not added to the Internet Explorer Trusted sites zone.
Обходное решение
Restrict access to JScript.dll
For 32-bit systems, enter the following command at an administrative command prompt:
For 64-bit systems, enter the following command at an administrative command prompt:
Impact of Workaround
Implementing these steps might result in reduced functionality for components or features that rely on jscript.dll. To be fully protected, Microsoft recommends the update be installed as soon as possible. Please revert the mitigation steps before installing the update to return to a full state.
By default, IE11, IE10, and IE9 uses Jscript9.dll which is not impacted by this vulnerability. This vulnerability only affects certain websites that utilize jscript as the scripting engine.
How to undo the workaround
For 32-bit systems, enter the following command at an administrative command prompt:
For 64-bit systems, enter the following command at an administrative command prompt:
FAQ
Will an updated Windows Update offline scan file, Wsusscn2.cab, with this new security update be available?
No, an updated scan file will not be available until the next security release in January 2019. As a workaround, you will need to download the December 2018 WSUS scan cab and then manually download this update from Microsoft Update Catalog to deploy.
Will the Windows 10 Delta packages be available?
No, Windows 10 Delta packages were not created for this security update release. Customers must use the Full Package, which will allow them to take the Delta again in January.
Обновления
| Продукт | Статья | Обновление |
|---|---|---|
| Internet Explorer 10 on Windows Server 2012 | ||
| Internet Explorer 9 on Windows Server 2008 for 32-bit Systems Service Pack 2 | ||
| Internet Explorer 9 on Windows Server 2008 for x64-based Systems Service Pack 2 | ||
| Internet Explorer 11 on Windows 10 Version 1703 for 32-bit Systems | ||
| Internet Explorer 11 on Windows 10 Version 1703 for x64-based Systems | ||
| Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems | ||
| Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems | ||
| Internet Explorer 11 on Windows 10 Version 1803 for ARM64-based Systems | ||
| Internet Explorer 11 on Windows 10 Version 1809 for 32-bit Systems | ||
| Internet Explorer 11 on Windows 10 Version 1809 for x64-based Systems |
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Возможность эксплуатации
Publicly Disclosed
Exploited
Latest Software Release
Older Software Release
EPSS
6.4 Medium
CVSS3
Связанные уязвимости
A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka "Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10. This CVE ID is unique from CVE-2018-8643.
A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka "Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10. This CVE ID is unique from CVE-2018-8643.
Уязвимость браузера Internet Explorer, вызванная выходом операции за границы буфера в памяти, позволяющая нарушителю выполнить произвольный код
EPSS
6.4 Medium
CVSS3