Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Endpoint

10/8/2019
05:25 PM
Connect Directly
Twitter
LinkedIn
Google+
RSS
E-Mail
100%
0%

Microsoft Issues 9 Critical Security Patches

None of the total 59 patches were for previously known vulnerabilities nor are any under active attack, Microsoft reports.

Today is the second Tuesday of the month, and Microsoft is right on schedule with 59 security fixes, nine of which are considered Critical in severity.

None of the vulnerablities were previously known or exploited, and 49 are ranked Important and one as Moderate. 

The latest release affects Windows, Internet Explorer, Edge, ChakraCore, Microsoft Office and Office Services and Web Apps, Microsoft Dynamics 365, SQL Server Management Studio, Windows Update Assistant, and Open Source Software. It's a smaller-volume roundup compared with many Patch Tuesdays of late: September's fixed 80 bugs and August's patched 93, including a wormable remote code execution (RCE) flaw. In July, Microsoft addressed 77 vulnerabilities.

October continued the trend of patching remote desktop vulnerabilities, which have been common the past four months. CVE-2019-1333 is an RCE flaw that exists in the Remote Desktop Client when a user connects with a malicious server. An attacker who successfully exploited the bug could view, change, or delete data; install programs; or create new accounts with user rights.

To exploit CVE-2019-1333, an attacker would need to control a server and convince a target to connect using a social engineering scam, DNS poisoning, or a man-in-the-middle attack. They could also compromise a legitimate server, host malicious code on it, and wait for someone to connect to it. Today's patch corrects how Remote Desktop Client handles connection requests.

While this RCE vulnerability is only being disclosed today and attackers haven't yet taken advantage of it, Microsoft warns exploitation is more likely for this one. The patch should be applied "immediately," says Richard Melick, senior technical product manager at Automox, even though this bug isn't as severe as the remote desktop flaws disclosed back in August.

"Lateral access through a network only requires one compromised machine and with this capability in the hands of an attacker, their actions would be masked longer due to the escalated access," Melick says of the implications of this vulnerability in the wrong hands. Even so, the requirement for attackers to convince a target to connect makes this tough to exploit.

Important-ranked patch CVE-2019-1326 is a Remote Desktop Protocol denial-of-service bug that exists when an attacker connects to the target system using RDP and sends specially crafted requests. If successful, they could cause the RDP service on a target system to stop responding.

Microsoft also re-released CVE-2019-1367, which was first deployed on Sept. 23 as an out-of-band patch to address a scripting engine memory corruption vulnerability in Internet Explorer that was under active attack. The bug could let an attacker execute arbitrary code at the same privilege level as a legitimate user and in doing so, install programs, view and change data, and create new accounts with full user rights while the legitimate user is logged in as an admin.

The update to this patch released today addresses a known printing issue some users might have experienced after installing any of the Security Updates, IE Cumulative Updates, or Monthly Rollups released on Sept. 23 or Oct. 3 for Internet Explorer 9, 10, or 11, or Windows.

For those who use the Azure App Service, another RCE vulnerability worth noting is CVE-2019-1372. This exists when Azure App Service/Antares on the Azure Stack fails to check the length of a buffer before copying the memory to it. An attacker who successfully exploited this could allow an unprivileged function run by the user to execute code in the context of NT Authority system and escape the sandbox. The patch ensures Azure App Services sanitizes user inputs.

"If you have the Azure App Service deployed to your Azure Stack, this patch should be prioritized," says Qualys director of product management Jimmy Graham.

Related Content:

Check out The Edge, Dark Reading's new section for features, threat data, and in-depth perspectives. Today's top story: "Can the Girl Scouts Save the Moon from Cyberattack?"

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
Mobile Banking Malware Up 50% in First Half of 2019
Kelly Sheridan, Staff Editor, Dark Reading,  1/17/2020
Exploits Released for As-Yet Unpatched Critical Citrix Flaw
Jai Vijayan, Contributing Writer,  1/13/2020
Microsoft to Officially End Support for Windows 7, Server 2008
Kelly Sheridan, Staff Editor, Dark Reading,  1/13/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win a Starbucks Card! Click Here
Latest Comment: This comment is waiting for review by our moderators.
Current Issue
The Year in Security: 2019
This Tech Digest provides a wrap up and overview of the year's top cybersecurity news stories. It was a year of new twists on old threats, with fears of another WannaCry-type worm and of a possible botnet army of Wi-Fi routers. But 2019 also underscored the risk of firmware and trusted security tools harboring dangerous holes that cybercriminals and nation-state hackers could readily abuse. Read more.
Flash Poll
[Just Released] How Enterprises are Attacking the Cybersecurity Problem
[Just Released] How Enterprises are Attacking the Cybersecurity Problem
Organizations have invested in a sweeping array of security technologies to address challenges associated with the growing number of cybersecurity attacks. However, the complexity involved in managing these technologies is emerging as a major problem. Read this report to find out what your peers biggest security challenges are and the technologies they are using to address them.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-7227
PUBLISHED: 2020-01-18
Westermo MRD-315 1.7.3 and 1.7.4 devices have an information disclosure vulnerability that allows an authenticated remote attacker to retrieve the source code of different functions of the web application via requests that lack certain mandatory parameters. This affects ifaces-diag.asp, system.asp, ...
CVE-2019-15625
PUBLISHED: 2020-01-18
A memory usage vulnerability exists in Trend Micro Password Manager 3.8 that could allow an attacker with access and permissions to the victim's memory processes to extract sensitive information.
CVE-2019-19696
PUBLISHED: 2020-01-18
A RootCA vulnerability found in Trend Micro Password Manager for Windows and macOS exists where the localhost.key of RootCA.crt might be improperly accessed by an unauthorized party and could be used to create malicious self-signed SSL certificates, allowing an attacker to misdirect a user to phishi...
CVE-2019-19697
PUBLISHED: 2020-01-18
An arbitrary code execution vulnerability exists in the Trend Micro Security 2019 (v15) consumer family of products which could allow an attacker to gain elevated privileges and tamper with protected services by disabling or otherwise preventing them to start. An attacker must already have administr...
CVE-2019-20357
PUBLISHED: 2020-01-18
A Persistent Arbitrary Code Execution vulnerability exists in the Trend Micro Security 2020 (v160 and 2019 (v15) consumer familiy of products which could potentially allow an attacker the ability to create a malicious program to escalate privileges and attain persistence on a vulnerable system.