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.

Comments
New Linux Worm Attacks IoT Devices
Newest First  |  Oldest First  |  Threaded View
<<   <   Page 2 / 2
Webtoolsoffers
Webtoolsoffers,
User Rank: Apprentice
6/28/2019 | 4:31:00 AM
Re: Linux Worm Exploits and Defenses
The IoT devices related to the internet. Now-a-day IoT devices is most useful because we can get information through mobile interenet
tdsan
tdsan,
User Rank: Ninja
6/27/2019 | 2:52:55 PM
Linux Worm Exploits and Defenses
The new software, dubbed "Silex," is running across the Internet looking for Linux systems deployed with default admin credentials. Once it finds such a system, it overwrites all of the system's storage with random data, drops its firewall rules, removes its network configuration, and then restarts the system — effectively rendering the device useless.

I do agree the responsibility should rest with the consumer where the system asks or provides insight on how to change the admin password but this should be a mandatory function (to change the password and remove telnet or disable it) when the user logs in. A number of companies are doing this but after reading the report, it seems this practice is not performed across the board.

 
It could attack any Linux system deployed on the Internet with open telnet ports and default admin credentials.

Ways to thwart the linux attack:
  • iptables -I INPUT 1 -m multiport --dport 23 -s 0.0.0.0/0 -m conntrack --ctstate NEW,ESTABLISHED,RELATED -j DROP (the code can be updated to include more ports (-m option), conntrack tracks the attempts and the --ctstate looks for NEW, ESTABLISHED and Relates sessions, the -J is used to drop the connection)
  • ufw deny in -proto tcp from 0.0.0.0/0 to 0.0.0.0/0 port 23 "comment Deny telnet access" or a shorter method is ufw deny in telnet.
  • Firewall - disable telnet from the IOT device or only allow internal access when needed if telnet is essential to diagnostic issues
  • Another option would be to stop the service all together
service stop telnet-server or systemctl stop telnet-server

 

Shodan provides a complete list of devices that still have default passwords enabled.

 Todd

 
<<   <   Page 2 / 2


Edge-DRsplash-10-edge-articles
I Smell a RAT! New Cybersecurity Threats for the Crypto Industry
David Trepp, Partner, IT Assurance with accounting and advisory firm BPM LLP,  7/9/2021
News
Attacks on Kaseya Servers Led to Ransomware in Less Than 2 Hours
Robert Lemos, Contributing Writer,  7/7/2021
Commentary
It's in the Game (but It Shouldn't Be)
Tal Memran, Cybersecurity Expert, CYE,  7/9/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
How Machine Learning, AI & Deep Learning Improve Cybersecurity
Machine intelligence is influencing all aspects of cybersecurity. Organizations are implementing AI-based security to analyze event data using ML models that identify attack patterns and increase automation. Before security teams can take advantage of AI and ML tools, they need to know what is possible. This report covers: -How to assess the vendor's AI/ML claims -Defining success criteria for AI/ML implementations -Challenges when implementing AI
Flash Poll
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2022-42247
PUBLISHED: 2022-10-03
pfSense v2.5.2 was discovered to contain a cross-site scripting (XSS) vulnerability in the browser.php component. This vulnerability allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into a file name.
CVE-2022-41443
PUBLISHED: 2022-10-03
phpipam v1.5.0 was discovered to contain a header injection vulnerability via the component /admin/subnets/ripe-query.php.
CVE-2022-33882
PUBLISHED: 2022-10-03
Under certain conditions, an attacker could create an unintended sphere of control through a vulnerability present in file delete operation in Autodesk desktop app (ADA). An attacker could leverage this vulnerability to escalate privileges and execute arbitrary code.
CVE-2022-42306
PUBLISHED: 2022-10-03
An issue was discovered in Veritas NetBackup through 8.2 and related Veritas products. An attacker with local access can send a crafted packet to pbx_exchange during registration and cause a NULL pointer exception, effectively crashing the pbx_exchange process.
CVE-2022-42307
PUBLISHED: 2022-10-03
An issue was discovered in Veritas NetBackup through 10.0.0.1 and related Veritas products. The NetBackup Primary server is vulnerable to an XML External Entity (XXE) Injection attack through the DiscoveryService service.