Multiple vulnerabilities in QNAP QTS
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 8 |
| CVE-ID | CVE-2016-2124 CVE-2020-25717 CVE-2020-25718 CVE-2020-25719 CVE-2020-25722 CVE-2021-3738 CVE-2020-25721 CVE-2021-23192 |
| CWE-ID | CWE-284 CWE-264 CWE-362 CWE-416 CWE-287 CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
QNAP QTS Server applications / File servers (FTP/HTTP) |
| Vendor | QNAP Systems, Inc. |
Security Bulletin
This security bulletin contains information about 8 vulnerabilities.
1) Improper access control
EUVDB-ID: #VU58098
Risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-2124
CWE-ID:
CWE-284 - Improper Access Control
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to SMB1 client connections can be downgraded to plaintext authentication. A remote attacker can perform a man-in-the-middle attack and downgrade a negotiated SMB1 client connection and its capabitilities.
MitigationInstall update from vendor's website.
Vulnerable software versionsQNAP QTS: 5.0.0 - 5.0.0.1870 20211201
CPE2.3 External linkshttp://www.qnap.com/en/release-notes/qts/5.0.0.1891/20211221
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.
2) Permissions, Privileges, and Access Controls
EUVDB-ID: #VU58097
Risk: Medium
CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-25717
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to the Windows Active Directory (AD) domains have by default a feature to allow users to create computer accounts. A remote authenticated attacker can create such account with elevated privileges on the system.
MitigationInstall update from vendor's website.
Vulnerable software versionsQNAP QTS: 5.0.0 - 5.0.0.1870 20211201
CPE2.3 External linkshttp://www.qnap.com/en/release-notes/qts/5.0.0.1891/20211221
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user 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.
3) Permissions, Privileges, and Access Controls
EUVDB-ID: #VU58096
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-25718
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a remote authenticated attacker to escalate privileges on the system.
The vulnerability exists due to Samba AD DC does not correctly sandbox Kerberos tickets issued by an RODC, which leads to security restrictions bypass and privilege escalation.
MitigationInstall update from vendor's website.
Vulnerable software versionsQNAP QTS: 5.0.0 - 5.0.0.1870 20211201
CPE2.3 External linkshttp://www.qnap.com/en/release-notes/qts/5.0.0.1891/20211221
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user 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.
4) Race condition
EUVDB-ID: #VU58095
Risk: Low
CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-25719
Exploit availability: No
DescriptionThe vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists due to a race condition. A remote administrator can exploit the race and escalate privileges on the system.
MitigationInstall update from vendor's website.
Vulnerable software versionsQNAP QTS: 5.0.0 - 5.0.0.1870 20211201
CPE2.3 External linkshttp://www.qnap.com/en/release-notes/qts/5.0.0.1891/20211221
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user 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.
5) Permissions, Privileges, and Access Controls
EUVDB-ID: #VU58093
Risk: Medium
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-25722
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a remote authenticated attacker to escalate privileges on the system.
The vulnerability exists due to application does not properly impose security restrictions, which leads to security restrictions bypass and privilege escalation.
MitigationInstall update from vendor's website.
Vulnerable software versionsQNAP QTS: 5.0.0 - 5.0.0.1870 20211201
CPE2.3 External linkshttp://www.qnap.com/en/release-notes/qts/5.0.0.1891/20211221
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user 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.
6) Use-after-free
EUVDB-ID: #VU58092
Risk: Medium
CVSSv3.1: 6.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-3738
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in Samba AD DC RPC server. A remote authenticated attacker can gain elevated privileges and perform a denial of service (DoS) attack.
MitigationInstall update from vendor's website.
Vulnerable software versionsQNAP QTS: 5.0.0 - 5.0.0.1870 20211201
CPE2.3 External linkshttp://www.qnap.com/en/release-notes/qts/5.0.0.1891/20211221
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user 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.
7) Improper Authentication
EUVDB-ID: #VU58094
Risk: Medium
CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-25721
CWE-ID:
CWE-287 - Improper Authentication
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error in when processing authentication requests. A remote attacker can bypass authentication process and gain unauthorized access to the application.
MitigationInstall update from vendor's website.
Vulnerable software versionsQNAP QTS: 5.0.0 - 5.0.0.1870 20211201
CPE2.3 External linkshttp://www.qnap.com/en/release-notes/qts/5.0.0.1891/20211221
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.
8) Input validation error
EUVDB-ID: #VU58091
Risk: Medium
CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-23192
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the DCE/RPC fragment injection issue. A remote attacker can replace subsequent fragments in requests with their own data and alter the server behavior.
MitigationInstall update from vendor's website.
Vulnerable software versionsQNAP QTS: 5.0.0 - 5.0.0.1870 20211201
CPE2.3 External linkshttp://www.qnap.com/en/release-notes/qts/5.0.0.1891/20211221
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.
