KNOW is Netenrich’s cybersecurity news aggregator and threat intel platform. You can see the most trending malware, threat actors, and vulnerabilities in our threat intel dashboard over the last 7 and 60 days. As per the dashboard, CVE-2020-29583 happens to be the most trending vulnerability in both these time frames.
So, why is CVE-2020-29583 trending? Let’s take a look.
What is CVE-2020-29583?
CVE-2020-29583 is a vulnerability in the firmware version 4.60 of Zyxel USG devices and contains an undocumented account (zyfwp) with an unchangeable password. The password for this account can be found in cleartext in the firmware. An attacker can use this account to login to the ssh server or web interface with admin privileges.
Here is a tabulation of all the software that are currently vulnerable.
- A fix for the NXC access point controller series products would not be released until April.
Why is CVE-2020-29583 trending?
Earlier this week, the Multi-State Information Sharing and Analysis Center, or MS-ISAC, issued an alert that the CVE-2020-29583 vulnerability poses a major cybersecurity risk for large enterprises and government agencies. According to the researchers, around 100,000 Zyxel devices are vulnerable to the backdoor.
As per MS-ISAC:
This could allow the attacker to change firewall settings, intercept traffic and create VPN accounts to gain access to the network behind the device and other administrative functions.
While no exploits have been spotted in the wild, the MS-ISAC notes that a threat actor could leverage this vulnerability to gain admin access to their targeted network’s inner parts and escalate privileges.
Reactions from Twitter
#1 Security Bulletin
— Virus Bulletin (@virusbtn) January 4, 2021
#2 The Hacker News
WARNING: A Secret Hard-Coded Backdoor Account Found in Some Zyxel Firewall, VPN Products
— The Hacker News (@TheHackersNews) January 1, 2021
Researchers: more than 100K Zyxel firewalls and VPN gateways have a hardcoded admin-level backdoor that can grant attackers root access to devices (@campuscodi / ZDNet)https://t.co/8Lrl7SGW22https://t.co/WdbHLfoqnA
— Techmeme (@Techmeme) January 2, 2021
CVE-2020-29583 references from KNOW
- First seen: 23 December 2020
- Last seen: 7 January 2021
- Total references: 66
- Last 60 days: 66
- Previous 7 days: 57
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