Vulnerability CVE-2020-29583
Published: 2020-12-22

Description:
Firmware version 4.60 of Zyxel USG devices contains an undocumented account (zyfwp) with an unchangeable password. The password for this account can be found in cleartext in the firmware. This account can be used by someone to login to the ssh server or web interface with admin privileges.

Type:

CWE-312

 (Cleartext Storage of Sensitive Information)

CVSS2 => (AV:L/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.1/10
2.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None

 References:
http://ftp.zyxel.com/USG40/firmware/USG40_4.60(AALA.1)C0_2.pdf
https://businessforum.zyxel.com/discussion/5252/zld-v4-60-revoke-and-wk48-firmware-release
https://businessforum.zyxel.com/discussion/5254/whats-new-for-zld4-60-patch-1-available-on-dec-15
https://www.eyecontrol.nl/blog/undocumented-user-account-in-zyxel-products.html
https://www.zyxel.com/support/CVE-2020-29583.shtml
https://www.zyxel.com/support/security_advisories.shtml
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