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.

Threat Intelligence

9/24/2019
01:00 PM
50%
50%

Microsoft Defender Bug Fixed with Emergency Patch

A second out-of-band patch issued this week addresses a denial-of-service vulnerability in Microsoft Defender.

Microsoft this week released two emergency security patches: one to fix a zero-day remote code execution flaw in Internet Explorer (CVE-2019-1367), and another to address a denial-of-service (DoS) vulnerability in Microsoft Defender, which was not previously known or exploited.

The latter, CVE-2019-1255, was discovered by Charalampos Billinis of F-Secure Countercept and Wenxu Wu of Tencent Security Xuanwu Lab. A vulnerability exists when Microsoft Defender, an anti-malware feature built into Windows, improperly handles files. An attacker could exploit this to prevent legitimate accounts from executing legitimate system binaries, Microsoft says. To exploit the DoS vulnerability, an attacker would first require execution on the target system.

This week's patch alters the way Microsoft Defender handles files. The last affected version of the Microsoft Malware Protection Engine is Version 1.1.16300.1, and the first version with the vulnerability addressed is Version 1.1.16400.2. Since the Malware Protection Engine is automatically updated, Microsoft says no action is required to install the latest update. Users who don't want to wait for the update can manually update their anti-malware software.

Read more details here.

Check out The Edge, Dark Reading's new section for features, threat data, and in-depth perspectives. Today's top story: "'Playing Around' with Code Keeps Security, DevOps Skills Sharp."

Dark Reading's Quick Hits delivers a brief synopsis and summary of the significance of breaking news events. For more information from the original source of the news item, please follow the link provided in this article. View Full Bio
 

Recommended Reading:

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
COVID-19: Latest Security News & Commentary
Dark Reading Staff 6/3/2020
Data Loss Spikes Under COVID-19 Lockdowns
Seth Rosenblatt, Contributing Writer,  5/28/2020
Abandoned Apps May Pose Security Risk to Mobile Devices
Robert Lemos, Contributing Writer,  5/29/2020
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
How Cybersecurity Incident Response Programs Work (and Why Some Don't)
This Tech Digest takes a look at the vital role cybersecurity incident response (IR) plays in managing cyber-risk within organizations. Download the Tech Digest today to find out how well-planned IR programs can detect intrusions, contain breaches, and help an organization restore normal operations.
Flash Poll
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-6497
PUBLISHED: 2020-06-03
Insufficient policy enforcement in Omnibox in Google Chrome on iOS prior to 83.0.4103.88 allowed a remote attacker to perform domain spoofing via a crafted URI.
CVE-2020-6498
PUBLISHED: 2020-06-03
Incorrect implementation in user interface in Google Chrome on iOS prior to 83.0.4103.88 allowed a remote attacker to perform domain spoofing via a crafted HTML page.
CVE-2020-6499
PUBLISHED: 2020-06-03
Inappropriate implementation in AppCache in Google Chrome prior to 80.0.3987.87 allowed a remote attacker to bypass AppCache security restrictions via a crafted HTML page.
CVE-2020-6500
PUBLISHED: 2020-06-03
Inappropriate implementation in interstitials in Google Chrome prior to 80.0.3987.87 allowed a remote attacker to spoof the contents of the Omnibox (URL bar) via a crafted HTML page.
CVE-2020-6501
PUBLISHED: 2020-06-03
Insufficient policy enforcement in CSP in Google Chrome prior to 80.0.3987.87 allowed a remote attacker to bypass content security policy via a crafted HTML page.