Latest Zyxel vulnerability: CVE-2024-7261 #
Zyxel has disclosed a vulnerability in several Zyxel Wireless Access Point (WAP) and router devices. A vulnerability in the handling of cookies sent via HTTP requests could allow an unauthenticated attacker to execute arbitrary code on the vulnerable system.
This vulnerability has been designated CVE-2024-7261 and is rated extremely critical with a CVSS score of 9.8.
What is the impact? #
Successful exploitation of these vulnerabilities result in devices allowing attackers to perform remote code execution (RCE) by sending a specially crafted cookie to the vulnerable device.
Are updates or workarounds available? #
Zyxel has released firmware updates that address these vulnerabilities and urge all users to update as quickly as possible.
How to find potentially vulnerable systems with runZero #
From the Asset Inventory, use the following query to locate systems running potentially vulnerable software:
hw:ZyxelCVE-2023-28771 (April 2023) #
In April 2023, Zyxel disclosed a remote command execution vulnerability affecting a handful of their product families. This vulnerability was assigned CVE-2023-28771, and with a CVSSv3 score of 9.8, this vulnerability was considered highly critical. Attackers who sent a specially crafted packet to UDP port 500 on an affected Zyxel device could execute arbitrary commands or create a denial-of-service condition.
Along with this disclosure, Zyxel announced updated software to address this issue; information about the update is available here.
There were reports that this vulnerability was being actively exploited in the wild. In the device's default configuration, the vulnerable port is often exposed to the public Internet.
How runZero users found affected devices #
runZero users located Zyxel devices by visiting the Asset Inventory and using the following pre-built query:
hw:"Zyxel" and udp_port:500
The devices found by this query should be checked to make sure they are running a patched version of their firmware.
As always, any prebuilt queries we create are available from our Queries Library. Check out the library for other useful inventory queries.
