CVE-2020-2504 : Exploit Details and Defense Strategies
Learn about CVE-2020-2504, an absolute path traversal vulnerability in QNAP's QES software. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
A path traversal vulnerability in QNAP's QES could allow attackers to access files in File Station. The issue has been addressed in QES 2.1.1 Build 20201006 and later.
Understanding CVE-2020-2504
This CVE involves an absolute path traversal vulnerability in QES, impacting certain versions of the software.
What is CVE-2020-2504?
CVE-2020-2504 is a security vulnerability that enables attackers to navigate through files in File Station due to improper path restrictions in QNAP's QES.
The Impact of CVE-2020-2504
The vulnerability has a CVSS base score of 5.8, categorizing it as a medium severity issue. If exploited, attackers could access files beyond the intended directory.
Technical Details of CVE-2020-2504
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The vulnerability allows for absolute path traversal, enabling unauthorized access to files in File Station.
Affected Systems and Versions
- Product: QES
- Vendor: QNAP Systems Inc.
- Versions Affected: Build 20201006 with versions less than 2.1.1
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Confidentiality Impact: Low
- Integrity Impact: None
- Privileges Required: None
- User Interaction: None
- Scope: Changed
- Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Mitigation and Prevention
Protecting systems from CVE-2020-2504 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update QES to version 2.1.1 Build 20201006 or later to mitigate the vulnerability.
- Monitor File Station for any unauthorized access or file traversal activities.
Long-Term Security Practices
- Implement proper input validation and access controls to prevent path traversal attacks.
- Regularly review and update security configurations to address emerging threats.
Patching and Updates
- QNAP has released fixes for this vulnerability in QES 2.1.1 Build 20201006 and later. Ensure timely installation of patches to secure the system.