CVE-2019-15801

Public Exploit

Description

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. The firmware image contains encrypted passwords that are used to authenticate users wishing to access a diagnostics or password-recovery menu. Using the hardcoded cryptographic key found elsewhere in the firmware, these passwords can be decrypted. This is related to fds_sys_passDebugPasswd_ret() and fds_sys_passRecoveryPasswd_ret() in libfds.so.0.0.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.29%
Vendor Advisory zyxel.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html third party advisory exploit
https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-15801?
CVE-2019-15801 has been scored as a high severity vulnerability.
How to fix CVE-2019-15801?
To fix CVE-2019-15801, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-15801 being actively exploited in the wild?
It is possible that CVE-2019-15801 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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