9.8
CRITICAL
CVE-2021-20702
CLUSTERPRO X Buffer Overflow Remote Code Execution
Description

Buffer overflow vulnerability in the Transaction Server CLUSTERPRO X 4.3 for Windows and earlier, EXPRESSCLUSTER X 4.3 for Windows and earlier, CLUSTERPRO X 4.3 SingleServerSafe for Windows and earlier, EXPRESSCLUSTER X 4.3 SingleServerSafe for Windows and earlier allows attacker to remote code execution via a network.

INFO

Published Date :

Nov. 3, 2021, 12:15 a.m.

Last Modified :

Nov. 7, 2023, 3:29 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-20702 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 clusterpro_x
2 Nec clusterpro_x_singleserversafe
3 Nec expresscluster_x
4 Nec expresscluster_x_singleserversafe
: Total Affected Vendor : 1 | Products : 4
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-2021-20702.

URL Resource
https://jpn.nec.com/security-info/secinfo/nv21-015_en.html

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-2021-20702 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-20702 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
  • CVE Source Update by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Changed Source JPCERT/CC NEC Corporation
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference NEC Corporation https://jpn.nec.com/security-info/secinfo/nv21-015_en.html [No types assigned]
    Removed Reference JPCERT/CC https://jpn.nec.com/security-info/secinfo/nv21-015_en.html
  • Modified Analysis by [email protected]

    Apr. 29, 2022

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:nec:clusterpro_x:*:*:*:*:*:windows:*:* versions from (including) 1.0 up to (including) 4.3 *cpe:2.3:a:nec:expresscluster_x:*:*:*:*:*:windows:*:* versions from (including) 1.0 up to (including) 4.3 OR *cpe:2.3:a:nec:clusterpro_x:*:*:*:*:*:windows:*:* versions from (including) 1.0 up to (including) 4.3 *cpe:2.3:a:nec:clusterpro_x_singleserversafe:*:*:*:*:*:windows:*:* versions from (including) 1.0 up to (including) 4.3 *cpe:2.3:a:nec:expresscluster_x:*:*:*:*:*:windows:*:* versions from (including) 1.0 up to (including) 4.3 *cpe:2.3:a:nec:expresscluster_x_singleserversafe:*:*:*:*:*:windows:*:* versions from (including) 1.0 up to (including) 4.3
  • CVE Modified by [email protected]

    Dec. 17, 2021

    Action Type Old Value New Value
    Changed Description Buffer overflow vulnerability in the Transaction Server CLUSTERPRO X 1.0 for Windows and later, EXPRESSCLUSTER X 1.0 for Windows and later allows attacker to remote code execution via a network. Buffer overflow vulnerability in the Transaction Server CLUSTERPRO X 4.3 for Windows and earlier, EXPRESSCLUSTER X 4.3 for Windows and earlier, CLUSTERPRO X 4.3 SingleServerSafe for Windows and earlier, EXPRESSCLUSTER X 4.3 SingleServerSafe for Windows and earlier allows attacker to remote code execution via a network.
  • Initial Analysis by [email protected]

    Nov. 08, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://jpn.nec.com/security-info/secinfo/nv21-015_en.html No Types Assigned https://jpn.nec.com/security-info/secinfo/nv21-015_en.html Vendor Advisory
    Added CWE NIST CWE-120
    Added CPE Configuration OR *cpe:2.3:a:nec:clusterpro_x:*:*:*:*:*:windows:*:* versions from (including) 1.0 up to (including) 4.3 *cpe:2.3:a:nec:expresscluster_x:*:*:*:*:*:windows:*:* versions from (including) 1.0 up to (including) 4.3
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-2021-20702 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-20702 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-67: String Format Overflow in syslog() String Format Overflow in syslog() CAPEC-92: Forced Integer Overflow Forced Integer Overflow CAPEC-100: Overflow Buffers Overflow Buffers
Exploit Prediction

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

0.66 }} 0.03%

score

0.79852

percentile

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