[Japanese]

JVNDB-2021-000111

Multiple vulnerabilities in GroupSession

Overview

GroupSession provided by Japan Total System Co.,Ltd. contains multiple vulnerabilities listed below.

*Incorrect Permission Assignment for Critical Resource (CWE-732) - CVE-2021-20874
*Open redirect (CWE-601) - CVE-2021-20875
*Path Traversal (CWE-22) - CVE-2021-20876

CVE-2021-20874
TAKUMA SHIGA reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

CVE-2021-20875, CVE-2021-20876
Tsutomu Aramaki of Mitsui Bussan Secure Directions, Inc. reported these vulnerabilities to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 7.5 (High) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: None
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 5.0 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: None
  • Confidentiality Impact: Partial
  • Integrity Impact: None
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2021-20874

CVSS V3 Severity:
Base Metrics: 4.7 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Changed
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics: 4.3 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2021-20875

CVSS V3 Severity:
Base Metrics: 4.9 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: High
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: None
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics: 4.0 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single
  • Confidentiality Impact: Partial
  • Integrity Impact: None
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2021-20876
Affected Products


Japan Total System Co.,Ltd.
  • GroupSession Free edition ver5.1.1 and earlier
  • GroupSession byCloud ver5.1.1 and earlier
  • GroupSession ZION ver5.1.1 and earlier

Impact

*A remote attacker may access arbitrary files on the server. As a result, sensitive information may be obtained - CVE-2021-20874
*When accessing a specially crafted URL, the user may be redirected to an arbitrary website. As a result, the user may become a victim of a phishing attack - CVE-2021-20875
*A remote attacker who logged in to the product with an administrative account may obtain sensitive information stored in the hierarchy above the directory on the publicated site's server - CVE-2021-20876
Solution

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

Japan Total System Co.,Ltd.
CWE (What is CWE?)

  1. Improper Input Validation(CWE-20) [IPA Evaluation]
  2. Path Traversal(CWE-22) [IPA Evaluation]
  3. No Mapping(CWE-Other) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2021-20874
  2. CVE-2021-20875
  3. CVE-2021-20876
References

  1. JVN : JVN#79798166
  2. National Vulnerability Database (NVD) : CVE-2021-20874
  3. National Vulnerability Database (NVD) : CVE-2021-20875
  4. National Vulnerability Database (NVD) : CVE-2021-20876
Revision History

  • [2021/12/20]
      Web page was published
  • [2021/12/21]
      Overview : Fixed the typo

Date Public2021/12/20
Date First Published2021/12/20
Date Last Updated2021/12/21