Multiple vulnerabilities in QNAP Proxy Server
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2017-7635 CVE-2017-7636 CVE-2017-7637 CVE-2017-7639 |
| CWE-ID | CWE-352 CWE-79 CWE-78 CWE-287 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
QNAP Proxy Server Server applications / Web servers |
| Vendor | QNAP Systems, Inc. |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Cross-site request forgery
EUVDB-ID: #VU13189
Risk: Low
CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-7635
CWE-ID:
CWE-352 - Cross-Site Request Forgery (CSRF)
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform CSRF attack.
The weakness exists due to insufficient CSRF protections. A remote attacker can create a specially crafted HTML page or URL, trick the victim into visiting it, gain access to the system and perform arbitrary actions.
Update to version 1.2.1. or 1.3.0.
Vulnerable software versionsQNAP Proxy Server: 1.0.2 - 1.2.0
External linkshttp://www.qnap.com/en/security-advisory/nas-201806-01
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) Cross-site scripting
EUVDB-ID: #VU13190
Risk: Low
CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-7636
CWE-ID:
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Exploit availability: No
DescriptionThe disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
MitigationUpdate to version 1.2.1. or 1.3.0.
Vulnerable software versionsQNAP Proxy Server: 1.0.2 - 1.2.0
External linkshttp://www.qnap.com/en/security-advisory/nas-201806-01
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.
3) OS command execution
EUVDB-ID: #VU13191
Risk: High
CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-7637
CWE-ID:
CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute shell commands on the target system.
The weakness exists due to incorrect processing of the user’s input data in the certain parameter. A remote attacker can inject and execute arbitrary shell commands with root privileges.
Mitigation
Update to version 1.2.1. or 1.3.0.
Vulnerable software versionsQNAP Proxy Server: 1.0.2 - 1.2.0
External linkshttp://www.qnap.com/en/security-advisory/nas-201806-01
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.
4) Authentication bypass
EUVDB-ID: #VU13192
Risk: Low
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-7639
CWE-ID:
CWE-287 - Improper Authentication
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass authentication on the target system.
The weakness exists due to improper authentication of requests. A remote attacker can bypass security restrictions and change the settings of Proxy Server.
Update to version 1.2.1. or 1.3.0.
Vulnerable software versionsQNAP Proxy Server: 1.0.2 - 1.2.0
External linkshttp://www.qnap.com/en/security-advisory/nas-201806-01
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.
