Multiple security vulnerabilities have been discovered by SEC Consult in various Zyxel devices, including flaws that involve sending unauthenticated DNS requests and hardcoded FTP credentials.
The first issue impacts Zyxel security and networking devices from the USG, UAG, ATP, VPN and NXC products, which are prone to unauthenticated DNS requests, a SEC Consult advisory reads.
The security bug could allow unauthenticated users to check whether a domain is present or not via the web login interface. The IP address is embedded in the response if the host with the corresponding domain is present.
“A DNS request can be made by an unauthenticated attacker to either spam a DNS service of a third party with requests that have a spoofed origin or probe whether domain names are present on the internal network behind the firewall,” the advisory reads.
SEC Consult also discovered that hardcoded FTP credentials are present in multiple Zyxel Wi-Fi access points from the NWA, NAP and WAC series.
With these credentials at hand, an attacker could log on to the APs FTP server and fetch the configuration file that includes SSIDs and passwords, which would allow them to move to protected networks.
“An FTP service runs on the Zyxel wireless access point that contains the configuration file for the WiFi network. This FTP server can be accessed with hardcoded credentials that are embedded in the firmware of the AP. When the WiFi network is bound to another VLAN, an attacker can cross the network by fetching the credentials from the FTP server,” SEC Consult notes.
SEC Consult said it discovered the vulnerabilities in June and reported them to Zyxel at the end of the month. Hotfixes and firmware updates were released at the end of August. For some of the impacted devices, the vendor only released hotfixes, with firmware updates scheduled to be released in the coming months.
Zyxel customers are advised to install the patches and firmware updates for their devices as soon as possible.
SEC Consult’s advisories also include lists with all of the devices impacted by these vulnerabilities.
Related: Verizon Patches Vulnerabilities Affecting Millions of Routers
Related: Crypto Flaw Affects Products From Cisco, Huawei, ZyXEL
Related: Flaws Affecting Top-Selling Netgear Routers Disclosed
More from Ionut Arghire
- Ransomware Gang Publishes Data Allegedly Stolen From Maritime Firm Royal Dirkzwager
- Zoom Paid Out $3.9 Million in Bug Bounties in 2022
- Malicious NuGet Packages Used to Target .NET Developers
- Google Pixel Vulnerability Allows Recovery of Cropped Screenshots
- Millions Stolen in Hack at Cryptocurrency ATM Manufacturer General Bytes
- NBA Notifying Individuals of Data Breach at Mailing Services Provider
- Adobe Acrobat Sign Abused to Distribute Malware
- Latitude Financial Services Data Breach Impacts 300,000 Customers
Latest News
- Ransomware Gang Publishes Data Allegedly Stolen From Maritime Firm Royal Dirkzwager
- Zoom Paid Out $3.9 Million in Bug Bounties in 2022
- Oleria Scores $8M Seed Funding for ID Authentication Technology
- Exploitation of 55 Zero-Day Vulnerabilities Came to Light in 2022: Mandiant
- News Analysis: UK Commits $3 Billion to Support National Quantum Strategy
- Malicious NuGet Packages Used to Target .NET Developers
- Google Pixel Vulnerability Allows Recovery of Cropped Screenshots
- Organizations Notified of Remotely Exploitable Vulnerabilities in Aveva HMI, SCADA Products
