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
Oldest First  |  Newest First  |  Threaded View
Data Privacy Protections for the Most Vulnerable -- Children
Dimitri Sirota, Founder & CEO of BigID,  10/17/2019
Sodinokibi Ransomware: Where Attackers' Money Goes
Kelly Sheridan, Staff Editor, Dark Reading,  10/15/2019
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
7 Threats & Disruptive Forces Changing the Face of Cybersecurity
This Dark Reading Tech Digest gives an in-depth look at the biggest emerging threats and disruptive forces that are changing the face of cybersecurity today.
Flash Poll
2019 Online Malware and Threats
2019 Online Malware and Threats
As cyberattacks become more frequent and more sophisticated, enterprise security teams are under unprecedented pressure to respond. Is your organization ready?
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2019-18214
PUBLISHED: 2019-10-19
The Video_Converter app 0.1.0 for Nextcloud allows denial of service (CPU and memory consumption) via multiple concurrent conversions because many FFmpeg processes may be running at once. (The workload is not queued for serial execution.)
CVE-2019-18202
PUBLISHED: 2019-10-19
Information Disclosure is possible on WAGO Series PFC100 and PFC200 devices before FW12 due to improper access control. A remote attacker can check for the existence of paths and file names via crafted HTTP requests.
CVE-2019-18209
PUBLISHED: 2019-10-19
templates/pad.html in Etherpad-Lite 1.7.5 has XSS when the browser does not encode the path of the URL, as demonstrated by Internet Explorer.
CVE-2019-18198
PUBLISHED: 2019-10-18
In the Linux kernel before 5.3.4, a reference count usage error in the fib6_rule_suppress() function in the fib6 suppression feature of net/ipv6/fib6_rules.c, when handling the FIB_LOOKUP_NOREF flag, can be exploited by a local attacker to corrupt memory, aka CID-ca7a03c41753.
CVE-2019-18197
PUBLISHED: 2019-10-18
In xsltCopyText in transform.c in libxslt 1.1.33, a pointer variable isn't reset under certain circumstances. If the relevant memory area happened to be freed and reused in a certain way, a bounds check could fail and memory outside a buffer could be written to, or uninitialized data could be disclo...