Path traversal in QNAP QTS, QuTS hero and QuTScloud
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-38693 |
| CWE-ID | CWE-22 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
QNAP QTS Server applications / File servers (FTP/HTTP) QuTS hero Hardware solutions / Firmware QuTScloud Operating systems & Components / Operating system |
| Vendor |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Path traversal
EUVDB-ID: #VU62837
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-38693
CWE-ID:
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in thttpd. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.
MitigationInstall update from vendor's website.
Vulnerable software versionsQNAP QTS: before 5.0.0.1986 20220324
QuTS hero: before h5.0.0.1949 Build 20220215
QuTScloud: before c5.0.1.1949
External linkshttp://www.qnap.com/en/security-advisory/qsa-22-13
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?
No. We are not aware of malware exploiting this vulnerability.
