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
Oldest First  |  Newest First  |  Threaded View
COVID-19: Latest Security News & Commentary
Dark Reading Staff 8/3/2020
Pen Testers Who Got Arrested Doing Their Jobs Tell All
Kelly Jackson Higgins, Executive Editor at Dark Reading,  8/5/2020
New 'Nanodegree' Program Provides Hands-On Cybersecurity Training
Nicole Ferraro, Contributing Writer,  8/3/2020
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
Special Report: Computing's New Normal, a Dark Reading Perspective
This special report examines how IT security organizations have adapted to the "new normal" of computing and what the long-term effects will be. Read it and get a unique set of perspectives on issues ranging from new threats & vulnerabilities as a result of remote working to how enterprise security strategy will be affected long term.
Flash Poll
The Changing Face of Threat Intelligence
The Changing Face of Threat Intelligence
This special report takes a look at how enterprises are using threat intelligence, as well as emerging best practices for integrating threat intel into security operations and incident response. Download it today!
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-11937
PUBLISHED: 2020-08-06
In whoopsie, parse_report() from whoopsie.c allows a local attacker to cause a denial of service via a crafted file. The DoS is caused by resource exhaustion due to a memory leak. Fixed in 0.2.52.5ubuntu0.5, 0.2.62ubuntu0.5 and 0.2.69ubuntu0.1.
CVE-2020-15114
PUBLISHED: 2020-08-06
In etcd before versions 3.3.23 and 3.4.10, the etcd gateway is a simple TCP proxy to allow for basic service discovery and access. However, it is possible to include the gateway address as an endpoint. This results in a denial of service, since the endpoint can become stuck in a loop of requesting i...
CVE-2020-15136
PUBLISHED: 2020-08-06
In ectd before versions 3.4.10 and 3.3.23, gateway TLS authentication is only applied to endpoints detected in DNS SRV records. When starting a gateway, TLS authentication will only be attempted on endpoints identified in DNS SRV records for a given domain, which occurs in the discoverEndpoints func...
CVE-2020-15701
PUBLISHED: 2020-08-06
An unhandled exception in check_ignored() in apport/report.py can be exploited by a local attacker to cause a denial of service. If the mtime attribute is a string value in apport-ignore.xml, it will trigger an unhandled exception, resulting in a crash. Fixed in 2.20.1-0ubuntu2.24, 2.20.9-0ubuntu7.1...
CVE-2020-15702
PUBLISHED: 2020-08-06
TOCTOU Race Condition vulnerability in apport allows a local attacker to escalate privileges and execute arbitrary code. An attacker may exit the crashed process and exploit PID recycling to spawn a root process with the same PID as the crashed process, which can then be used to escalate privileges....