[Japanese]

JVNDB-2021-001343

D-Link DAP-1880AC contains multiple vulnerabilities

Overview

DAP-1880AC provided by D-Link Japan K.K. contains multiple vulnerabilities listed below.

* Improper access control (CWE-284) - CVE-2021-20694
* Improper privilege management (CWE-269) - CVE-2021-20695
* OS command injection (CWE-78) - CVE-2021-20696
* Missing authentication for critical function (CWE-306) - CVE-2021-20697

Chuya Hayakawa of 00One, Inc. reported this vulnerability to JPCERT/CC.
JPCERT/CC coordinated with the developer.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 5.0 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: Low
The above CVSS base scores have been assigned for CVE-2021-20694

CVSS V3 Severity:
Base Metrics: 8.8 (High) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
The above CVSS base scores have been assigned for CVE-2021-20695

CVSS V3 Severity:
Base Metrics: 6.3 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: Low
The above CVSS base scores have been assigned for CVE-2021-20696

CVSS V3 Severity:
Base Metrics: 7.3 (High) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: Low
The above CVSS base scores have been assigned for CVE-2021-20697
Affected Products


D-Link Systems, Inc.
  • DAP-1880AC firmware firmware version 1.21 and prior

Impact

* An authenticated remote attacker can start telnet service. - CVE-2021-20694
* A low-privileged remote attacker can gain root privileges. - CVE-2021-20695
* If an authenticated remote attacker can send a specially crafted request to a specific CGI program, it may lead to an arbitrary OS command injection. - CVE-2021-20696
* A remote attacker can login to the product as a low-privileged user without the access privilege. - CVE-2021-20697
Solution

[Update firmware]
Update firmware to the latest version according to the information provided by the developer.
The developer has released the fixed version 1.23.
Vendor Information

D-Link Systems, Inc.
CWE (What is CWE?)

  1. Improper Privilege Management(CWE-269) [IPA Evaluation]
  2. Improper Access Control(CWE-284) [IPA Evaluation]
  3. Missing Authentication for Critical Function(CWE-306) [IPA Evaluation]
  4. OS Command Injection(CWE-78) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2021-20694
  2. CVE-2021-20695
  3. CVE-2021-20696
  4. CVE-2021-20697
References

  1. JVN : JVNVU#92898656
  2. National Vulnerability Database (NVD) : CVE-2021-20694
  3. National Vulnerability Database (NVD) : CVE-2021-20695
  4. National Vulnerability Database (NVD) : CVE-2021-20696
  5. National Vulnerability Database (NVD) : CVE-2021-20697
Revision History

  • [2021/04/12]
      Web page was published

Date Public2021/04/09
Date First Published2021/04/12
Date Last Updated2021/04/12