Cryptographic Vulnerability in Zyxel GS1900 Devices
CVE-2019-15801

7.5HIGH

Key Information:

Vendor

Zyxel
Status
Gs1900-8 Firmware
Vendor
CVE Published:
14 November 2019

What is CVE-2019-15801?

A security issue was found in Zyxel GS1900 devices running firmware versions earlier than 2.50(AAHH.0)C0. The firmware incorporates encrypted passwords for user authentication to access diagnostic and password recovery menus. However, through the use of a hardcoded cryptographic key embedded within the firmware, these passwords can be decrypted, leading to potential unauthorized access. This flaw is tied to the functions fds_sys_passDebugPasswd_ret() and fds_sys_passRecoveryPasswd_ret() found in libfds.so.0.0.

References

https://jasper.la/exploring-zyxel-gs1900-firmware-with-gh...
x_refsource_MISC
https://www.zyxel.com/support/gs1900-switch-vulnerabiliti...
x_refsource_CONFIRM

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.