[Japanese]

JVNDB-2021-000021

M-System DL8 contains multiple vulnerabilities

Overview

DL8 provided by M-System contains the following vulnerabilities:
*Denial-of-Service (CWE-400) - CVE-2021-20675
*Improper Access Control (CWE-284) - CVE-2021-20676

CVE-2021-20675
Takayuki Sasaki, Katsunari Yoshioka of Yokohama National University reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

CVE-2021-20676
Takayuki Sasaki, Kouichirou Okada, Katsunari Yoshioka of Yokohama National University reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 6.5 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: High
CVSS V2 Severity:
Base Metrics 6.8 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single Instance
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Complete
The above CVSS base scores have been assigned for CVE-2021-20675

CVSS V3 Severity:
Base Metrics: 4.3 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics: 4.0 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2021-20676
Affected Products


M-System Co., Ltd.
  • Type A (DL8-A) versions prior to Ver3.0
  • Type B (DL8-B) versions prior to Ver3.0
  • Type C (DL8-C) versions prior to Ver3.0
  • Type D (DL8-D) versions prior to Ver3.0
  • Type E (DL8-E) versions prior to Ver3.0

Impact

*Denial-of-Service attack may be done from a user who logs in to the web interface of the product - CVE-2021-20675
*Prohibited operation may be done by a user who logs in to the web interface of the product - CVE-2021-20676
Solution

[Update the firmware]
Update the firmware to the latest version according to the information provided by the developer.
Vendor Information

M-System Co., Ltd.
CWE (What is CWE?)

  1. Permissions(CWE-264) [IPA Evaluation]
  2. No Mapping(CWE-Other) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2021-20675
  2. CVE-2021-20676
References

  1. JVN : JVN#47497535
  2. National Vulnerability Database (NVD) : CVE-2021-20675
  3. National Vulnerability Database (NVD) : CVE-2021-20676
Revision History

  • [2021/03/12]
      Web page was published

Date Public2021/03/12
Date First Published2021/03/12
Date Last Updated2021/03/12