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.

Risk

Microsoft DNS Security Fix Knocks ZoneAlarm Users Offline

The vulnerability is widespread and affects products made by numerous networking and software vendors beyond Microsoft.

Users of Check Point Software's ZoneAlarm personal firewall products are reporting that a patch released Tuesday by Microsoft to fix a serious security flaw breaks their connection to the Internet.

"For those of you using ZoneAlarm who installed the Windows updates today, you probably already know that your internet connection has died," wrote user 'Winchester73', in a post Tuesday on the popular broadband forum DSLreports.com.

Numerous other forum users reported experiencing the same problem. Dozens of posters on ZoneAlarm's own user forum also reported Internet outages. "I service and administer approximately 200 privately owned computers and I have received about 20+ telephone calls from users with this problem today," wrote 'Calken'.

A spokesman for Check Point said the company planned on releasing a fix later in the day on Wednesday.

The problem began when Microsoft on Tuesday sent patch number KB951748 to Windows users. The patch is designed to plug a security vulnerability that leaves computers vulnerable to so-called DNS attacks.

The vulnerability is widespread and affects products made by numerous networking and software vendors beyond Microsoft. It was discovered by Dan Kaminsky, of the Seattle-based security firm IOActive.

Through a DNS attack, a hacker can redirect Internet users' page requests to phishing sites or other malicious pages. Various reports suggest that ZoneAlarm interprets the Microsoft patch itself as malicious code, and automatically severs the user's Internet connection in response.

Until a fix is issued, some forum users are working around the glitch by either uninstalling ZoneAlarm or the Microsoft patch. Either move, however, could leave their computers vulnerable to cyber-attacks.

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Black Hat Q&A: Hacking a '90s Sports Car
Black Hat Staff, ,  11/7/2019
The Cold Truth about Cyber Insurance
Chris Kennedy, CISO & VP Customer Success, AttackIQ,  11/7/2019
6 Small-Business Password Managers
Curtis Franklin Jr., Senior Editor at Dark Reading,  11/8/2019
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
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
Assessing Cybersecurity Risk in Today's Enterprise
Assessing Cybersecurity Risk in Today's Enterprise
Security leaders are struggling to understand their organizations risk exposure. While many are confident in their security strategies and processes, theyre also more concerned than ever about getting breached. Download this report today and get insights on how today's enterprises assess and perceive the risks they face in 2019!
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2011-5271
PUBLISHED: 2019-11-12
Pacemaker before 1.1.6 configure script creates temporary files insecurely
CVE-2014-3599
PUBLISHED: 2019-11-12
HornetQ REST is vulnerable to XML External Entity due to insecure configuration of RestEasy
CVE-2014-7143
PUBLISHED: 2019-11-12
Python Twisted 14.0 trustRoot is not respected in HTTP client
CVE-2018-18819
PUBLISHED: 2019-11-12
A vulnerability in the web conference chat component of MiCollab, versions 7.3 PR6 (7.3.0.601) and earlier, and 8.0 (8.0.0.40) through 8.0 SP2 FP2 (8.0.2.202), and MiVoice Business Express versions 7.3 PR3 (7.3.1.302) and earlier, and 8.0 (8.0.0.40) through 8.0 SP2 FP1 (8.0.2.202), could allow creat...
CVE-2019-18658
PUBLISHED: 2019-11-12
In Helm 2.x before 2.15.2, commands that deal with loading a chart as a directory or packaging a chart provide an opportunity for a maliciously designed chart to include sensitive content such as /etc/passwd, or to execute a denial of service (DoS) via a special file such as /dev/urandom, via symlin...