Vulnerability CVE-2019-12583
Published: 2019-06-27

Description:
Missing Access Control in the "Free Time" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator. This can lead to unauthorised network access or Denial of Service.

Type:

CWE-264

 (Permissions, Privileges, and Access Controls)

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

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.4/10
4.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
Partial
Affected software
Zyxel -> Uag2100 firmware 
Zyxel -> Uag4100 firmware 
Zyxel -> Uag5100 firmware 
Zyxel -> Usg1100 firmware 
Zyxel -> Usg110 firmware 
Zyxel -> Usg1900 firmware 
Zyxel -> Usg210 firmware 
Zyxel -> Usg2200-vpn firmware 
Zyxel -> Usg310 firmware 
Zyxel -> Zywall 1100 firmware 
Zyxel -> Zywall 110 firmware 
Zyxel -> Zywall 310 firmware 
Zyxel -> Zywall vpn100 firmware 
Zyxel -> Zywall vpn300 firmware 

 References:
https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/
https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml
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