Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Zyxel | Gs1900-8 Firmware | < 2.50\(aahh.0\)c0 |
| Zyxel | Gs1900-8 | - |
| Zyxel | Gs1900-8Hp Firmware | < 2.50\(aahi.0\)c0 |
| Zyxel | Gs1900-8Hp | - |
| Zyxel | Gs1900-10Hp Firmware | < 2.50\(aazi.0\)c0 |
| Zyxel | Gs1900-10Hp | - |
| Zyxel | Gs1900-16 Firmware | < 2.50\(aahj.0\)c0 |
| Zyxel | Gs1900-16 | - |
| Zyxel | Gs1900-24E Firmware | < 2.50\(aahk.0\)c0 |
| Zyxel | Gs1900-24E | - |
| Zyxel | Gs1900-24 Firmware | < 2.50\(aahl.0\)c0 |
| Zyxel | Gs1900-24 | - |
| Zyxel | Gs1900-24Hp Firmware | < 2.50\(aahm.0\)c0 |
| Zyxel | Gs1900-24Hp | - |
| Zyxel | Gs1900-48 Firmware | < 2.50\(aahn.0\)c0 |
| Zyxel | Gs1900-48 | - |
| Zyxel | Gs1900-48Hp Firmware | < 2.50\(aaho.0\)c0 |
| Zyxel | Gs1900-48Hp | - |
Related Weaknesses (CWE)
References
- https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.htmlExploitThird Party Advisory
- https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtmlVendor Advisory
- https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.htmlExploitThird Party Advisory
- https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtmlVendor Advisory
FAQ
What is CVE-2019-15801?
CVE-2019-15801 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...
How severe is CVE-2019-15801?
CVE-2019-15801 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-15801?
Check the references section above for vendor advisories and patch information. Affected products include: Zyxel Gs1900-8 Firmware, Zyxel Gs1900-8, Zyxel Gs1900-8Hp Firmware, Zyxel Gs1900-8Hp, Zyxel Gs1900-10Hp Firmware.