Multiple vulnerabilities in QNAP QTS
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2020-2509 CVE-2020-9490 |
| CWE-ID | CWE-78 CWE-20 |
| Exploitation vector | Network |
| Public exploit | Vulnerability #1 is being exploited in the wild. |
| Vulnerable software |
QNAP QTS Server applications / File servers (FTP/HTTP) |
| Vendor | QNAP Systems, Inc. |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) OS Command Injection
EUVDB-ID: #VU51879
Risk: High
CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]
CVE-ID: CVE-2020-2509
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. A remote unauthenticated attacker can send specially crafted HTTP request to port 8080/TCP and execute arbitrary OS commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall update from vendor's website.
QNAP QTS: 4.3.6.0805 20181228 - 4.3.6.1446 20200929
CPE2.3 External linkshttps://www.qnap.com/en/release-notes/qts/4.3.6.1620/20210322
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.
2) Input validation error
EUVDB-ID: #VU35880
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-9490
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input when processing Cache-Digest header in HTTP/2 request. A remote attacker can pass specially crafted HTTP/2 request to the Apache HTTP Server, trigger the server to send the HTTP/2
PUSH and perform a denial of service (DoS) attack.
Install update from vendor's website.
QNAP QTS: 4.3.6.0805 20181228 - 4.3.6.1446 20200929
CPE2.3 External linkshttps://www.qnap.com/en/release-notes/qts/4.3.6.1620/20210322
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
