Remote code execution in multiple Zyxel storage devices
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-9054 |
| CWE-ID | CWE-78 |
| Exploitation vector | Network |
| Public exploit | Vulnerability #1 is being exploited in the wild. |
| Vulnerable software |
Zyxel NAS 326 Hardware solutions / Firmware NAS520 Hardware solutions / Routers for home users NAS540 Hardware solutions / Routers for home users NAS542 Hardware solutions / Routers for home users NSA210 Hardware solutions / Routers for home users NSA220 Hardware solutions / Routers for home users NSA220+ Hardware solutions / Routers for home users NSA221 Hardware solutions / Routers for home users NSA310 Hardware solutions / Routers for home users NSA310S Hardware solutions / Routers for home users NSA320 Hardware solutions / Routers for home users NSA320S Hardware solutions / Routers for home users NSA325 Hardware solutions / Routers for home users NSA325v2 Hardware solutions / Routers for home users |
| Vendor | ZyXEL Communications Corp. |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) OS Command Injection
EUVDB-ID: #VU25597
Risk: High
CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]
CVE-ID: CVE-2020-9054
CWE-ID:
CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper input validation when processing username in the login form. A remote unauthenticated attacker can send a specially crafted HTTP request and execute arbitrary OS commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationThe vendor has released a hotfix for the following models:
- NAS326
- NAS520
- NAS540
- NAS542
Zyxel NAS 326: 5.21
NAS520: 5.21
NAS540: 5.21
NAS542: 5.21
NSA210: All versions
NSA220: All versions
NSA220+: All versions
NSA221: All versions
NSA310: All versions
NSA310S: All versions
NSA320: All versions
NSA320S: All versions
NSA325: All versions
NSA325v2: All versions
CPE2.3- cpe:2.3:h:zyxel_communications_corp:zyxel_nas_326:5.21:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:nas520:5.21:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:nas540:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:nas540:5.21:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:nas542:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:nas542:5.21:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:nsa210:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:nsa220:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:nsa220:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:nsa221:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:nsa310:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:nsa310s:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:nsa320:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:nsa320s:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:nsa325:*:*:*:*:*:*:*:
- cpe:2.3:h:zyxel_communications_corp:nsa325v2:*:*:*:*:*:*:*:
http://www.zyxel.com/support/remote-code-execution-vulnerability-of-NAS-products.shtml
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.
