[Japanese]

JVNDB-2020-000022

Multiple vulnerabilities in EasyBlocks IPv6

Overview

EasyBlocks IPv6 provided by Plat'Home Co., Ltd. contains multiple vulnerabilities listed below.
*Cross site request forgery(CWE-352) - CVE-2020-5549
*Session fixation (CWE-384) - CVE-2020-5550

Hideki SAKAMOTO of Tsukuba Secure Network Research 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 4.2 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Unchanged
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 4.0 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: High
  • Authentication: None
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2020-5550

CVSS V3 Severity:
Base Metrics: 4.3 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics: 2.6 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: High
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2020-5549
Affected Products


PlatHome
  • EasyBlocks IPv6 Ver. 2.0.1 and earlier
  • EasyBlocks IPv6 Enterprise Ver. 2.0.1 and earlier

Impact

*If a user views a malicious page while logged in the management console, unintended operations may be performed - CVE-2020-5549
*A remote attacker impersonating a registered user may log in the management console. As a result, information may be altered/disclosed. - CVE-2020-5550
Solution

[Update the Firmware]
Update to the latest version according to the information provided by the developer.

[Apply a Workaround]
Blocking access from untrusted network or host to port 880 may mitigate the impacts of this vulnerability.
Vendor Information

PlatHome
CWE (What is CWE?)

  1. Cross-Site Request Forgery(CWE-352) [IPA Evaluation]
  2. No Mapping(CWE-Other) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2020-5549
  2. CVE-2020-5550
References

  1. JVN : JVN#89224521
  2. National Vulnerability Database (NVD) : CVE-2020-5549
  3. National Vulnerability Database (NVD) : CVE-2020-5550
Revision History

  • [2020/04/08]
      Web page was published

Date Public2020/04/08
Date First Published2020/04/08
Date Last Updated2020/04/08