8.8
HIGH
CVE-2021-20740
Hitachi Virtual File Platform Root Command Injection
Description

Hitachi Virtual File Platform Versions prior to 5.5.3-09 and Versions prior to 6.4.3-09, and NEC Storage M Series NAS Gateway Nh4a/Nh8a versions prior to FOS 5.5.3-08(NEC2.5.4a) and Nh4b/Nh8b, Nh4c/Nh8c versions prior to FOS 6.4.3-08(NEC3.4.2) allow remote authenticated attackers to execute arbitrary OS commands with root privileges via unspecified vectors.

INFO

Published Date :

June 28, 2021, 1:15 a.m.

Last Modified :

July 6, 2021, 2:32 p.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2021-20740 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Nec nas_gateway_nh4a_firmware
2 Nec nas_gateway_nh8a_firmware
3 Nec nas_gateway_nh4b_firmware
4 Nec nas_gateway_nh8b_firmware
5 Nec nas_gateway_nh4c_firmware
6 Nec nas_gateway_nh8c_firmware
1 Hitachi virtual_file_platform
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-20740.

URL Resource
https://jpn.nec.com/security-info/secinfo/nv21-011.html Vendor Advisory
https://jvn.jp/en/jp/JVN21298724/index.html Third Party Advisory
https://www.hitachi.co.jp/products/it/storage-solutions/global/sec_info/2021/2021_306.html Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-20740 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-20740 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Jul. 06, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://jpn.nec.com/security-info/secinfo/nv21-011.html No Types Assigned https://jpn.nec.com/security-info/secinfo/nv21-011.html Vendor Advisory
    Changed Reference Type https://jvn.jp/en/jp/JVN21298724/index.html No Types Assigned https://jvn.jp/en/jp/JVN21298724/index.html Third Party Advisory
    Changed Reference Type https://www.hitachi.co.jp/products/it/storage-solutions/global/sec_info/2021/2021_306.html No Types Assigned https://www.hitachi.co.jp/products/it/storage-solutions/global/sec_info/2021/2021_306.html Vendor Advisory
    Added CWE NIST CWE-78
    Added CPE Configuration OR *cpe:2.3:a:hitachi:virtual_file_platform:*:*:*:*:*:*:*:* versions up to (excluding) 6.4.3-09
    Added CPE Configuration OR *cpe:2.3:a:hitachi:virtual_file_platform:*:*:*:*:*:*:*:* versions up to (excluding) 5.5.3-09
    Added CPE Configuration AND OR *cpe:2.3:o:nec:nas_gateway_nh4a_firmware:*:*:*:*:*:*:*:* versions up to (excluding) fos_5.5.3-08\(nec2.5.4a\) OR cpe:2.3:h:nec:nas_gateway_nh4a:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:nec:nas_gateway_nh8a_firmware:*:*:*:*:*:*:*:* versions up to (excluding) fos_5.5.3-08\(nec2.5.4a\) OR cpe:2.3:h:nec:nas_gateway_nh8a:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:nec:nas_gateway_nh4b_firmware:*:*:*:*:*:*:*:* versions up to (excluding) fos_6.4.3-08\(nec3.4.2\) OR cpe:2.3:h:nec:nas_gateway_nh4b:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:nec:nas_gateway_nh8b_firmware:*:*:*:*:*:*:*:* versions up to (excluding) fos_6.4.3-08\(nec3.4.2\) OR cpe:2.3:h:nec:nas_gateway_nh8b:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:nec:nas_gateway_nh4c_firmware:*:*:*:*:*:*:*:* versions up to (excluding) fos_6.4.3-08\(nec3.4.2\) OR cpe:2.3:h:nec:nas_gateway_nh4c:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:nec:nas_gateway_nh8c_firmware:*:*:*:*:*:*:*:* versions up to (excluding) fos_6.4.3-08\(nec3.4.2\) OR cpe:2.3:h:nec:nas_gateway_nh8c:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-20740 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.72 }} -0.14%

score

0.77835

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability