8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.4 High
AI Score
Confidence
Low
0.015 Low
EPSS
Percentile
86.8%
Successful exploitation of this vulnerability could allow an attacker to achieve remote code execution by exploiting NTP settings.
The following versions of QNAP VioStor NVR, are affected:
3.2.1 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND (‘OS COMMAND INJECTION’) CWE-78
QNAP VioStor NVR versions prior to QVR Firmware 4.x are vulnerable to an OS command injection vulnerability that may allow an attacker to modify NTP settings in the device. This could result in remote code execution.
CVE-2023-47565 has been assigned to this vulnerability. A CVSS v3.1 base score of 8.0 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
Chad Seaman and Larry Cashdollar of Akamai Technologies reported this vulnerability to CISA.
QNAP has provided that users should download and apply the latest QVR Firmware.
QNAP has stated that QVR Firmware 5.x and 4.x are both end of life.
For more information, see QNAP’s security advisory.
For more information, contact QNAP Support.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
CISA has received reports of this vulnerability being actively exploited.
This advisory contains a vulnerability that has an associated “Known Exploited Vulnerabilities” (KEV) entry. Refer to the following link to view the KEV entry: Known Exploited Vulnerabilities Catalog | CISA
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-47565
cwe.mitre.org/data/definitions/78.html
github.com/cisagov/CSAF
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=QNAP%20VioStor%20NVR+https://www.cisa.gov/news-events/ics-advisories/icsa-23-355-02
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.cisa.gov/known-exploited-vulnerabilities-catalog
www.cisa.gov/resources-tools/resources/ics-recommended-practices
www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf
www.cisa.gov/topics/industrial-control-systems
www.cisa.gov/topics/industrial-control-systems
www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
www.facebook.com/sharer/sharer.php?u=https://www.cisa.gov/news-events/ics-advisories/icsa-23-355-02&title=QNAP%20VioStor%20NVR
www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
www.instagram.com/cisagov
www.linkedin.com/company/cybersecurity-and-infrastructure-security-agency
www.linkedin.com/sharing/share-offsite/?url=https://www.cisa.gov/news-events/ics-advisories/icsa-23-355-02
www.oig.dhs.gov/
www.qnap.com/en-us/contact-us/
www.qnap.com/en/download?
www.qnap.com/en/security-advisory/qsa-23-48
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-23-355-02
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=QNAP%20VioStor%20NVR&body=www.cisa.gov/news-events/ics-advisories/icsa-23-355-02
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.4 High
AI Score
Confidence
Low
0.015 Low
EPSS
Percentile
86.8%