Perimeter

10/9/2018
03:45 PM
Connect Directly
Twitter
LinkedIn
Google+
RSS
E-Mail
50%
50%

Microsoft Fixes Privilege Escalation 0Day Under Active Attack

This month's Patch Tuesday includes 49 patches, two of which are ranked Critical, and two security advisories.

Microsoft's monthly Patch Tuesday update is here once again, and with it come 49 security fixes and two advisories for Internet Explorer (IE), Microsoft Edge, Windows components, Microsoft Office and Office Services, Exchange, SQL Server, ChakraCore, Hyper-V, and .NET Core.

Twelve the vulnerabilities patched today are deemed Critical, 35 are categorized Important, one is Moderate, and one is considered Low severity. Three were known at the time their patches were released, and one is currently being exploited in active attacks.

The bug being abused in attacks is CVE-2018-8453, a Win32k elevation of privilege vulnerability that exists in Windows when the Win32k component doesn't properly handle objects in memory. An attacker who successfully exploited the vuln by logging onto the system and running a specially crafted application could run arbitrary code in kernel mode, install programs, and view, edit, or delete data. It affects Windows 7, 8.1, 10, and Server 2008, 2012, 2016, and 2019.

"Little information is provided about the active attacks, but considering the nature of the vulnerability and the credit to Kaspersky Lab for reporting it, this is most certainly being used by malware," writes Dustin Childs of Trend Micro's Zero Day Initiative (ZDI) in a blog post.

Another fix to prioritize is CVE-2018-8423, a Microsoft JET Database Engine remote code execution vulnerability. The vulnerability was disclosed last month along with exploit code. An attacker could exploit the bug by sending a user a malicious file which when opened could cause the JET engine to execute an out-of-bounds write and allow remote code execution.

"The JET Database Engine software is ubiquitous," says Tenable deputy CTO Glen Pendley, who notes that an REC flaw with known exploit code should be fixed ASAP. "It’s shipped on all Windows machines and is leveraged by a number of applications, including Microsoft Office."

Childs points out that it's interesting that this fix is categorized Important, while two JET Database patches released last month were ranked Critical and had similar descriptions. The earlier two involved Excel files; this one can be exploited with a specially crafted JET Database Engine file.

CVE-2018-8423 is only one of three vulnerabilities known at the time of its patch release. The other two are CVE-2018-8497, a Windows Kernel Elevation of Privilege Vulnerability, and CVE-2018-8531, an Azure IoT Device Client SDK Memory Corruption Vulnerability.

Related Content:

 

Black Hat Europe returns to London Dec 3-6 2018  with hands-on technical Trainings, cutting-edge Briefings, Arsenal open-source tool demonstrations, top-tier security solutions and service providers in the Business Hall. Click for information on the conference and to register.

Kelly Sheridan is the Staff Editor at Dark Reading, where she focuses on cybersecurity news and analysis. She is a business technology journalist who previously reported for InformationWeek, where she covered Microsoft, and Insurance & Technology, where she covered financial ... View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Higher Education: 15 Books to Help Cybersecurity Pros Be Better
Curtis Franklin Jr., Senior Editor at Dark Reading,  12/12/2018
'PowerSnitch' Hacks Androids via Power Banks
Kelly Jackson Higgins, Executive Editor at Dark Reading,  12/8/2018
Worst Password Blunders of 2018 Hit Organizations East and West
Curtis Franklin Jr., Senior Editor at Dark Reading,  12/12/2018
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Current Issue
10 Best Practices That Could Reshape Your IT Security Department
This Dark Reading Tech Digest, explores ten best practices that could reshape IT security departments.
Flash Poll
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2018-19007
PUBLISHED: 2018-12-14
In Geutebrueck GmbH E2 Camera Series versions prior to 1.12.0.25 the DDNS configuration (in the Network Configuration panel) is vulnerable to an OS system command injection as root.
CVE-2018-20147
PUBLISHED: 2018-12-14
In WordPress versions before 5.0.1, authors could modify metadata to bypass intended restrictions on deleting files.
CVE-2018-20148
PUBLISHED: 2018-12-14
In WordPress versions before 5.0.1, contributors could conduct PHP object injection attacks via crafted metadata.
CVE-2018-20149
PUBLISHED: 2018-12-14
In WordPress versions before 5.0.1, when the Apache HTTP Server is used, authors could upload crafted files that bypass intended MIME type restrictions, leading to XSS.
CVE-2018-20150
PUBLISHED: 2018-12-14
In WordPress versions before 5.0.1, crafted URLs could trigger XSS for certain use cases involving plugins.