[Japanese]

JVNDB-2022-000020

Multiple vulnerabilities in pfSense

Overview

pfSense software provided by Netgate contains multiple vulnerabilities listed below.

* Cross-site scripting (CWE-79) - CVE-2021-20729
* Improper access control (CWE-284) - CVE-2022-26019
* Improper input validation (CWE-20) - CVE-2022-24299

Yutaka WATANABE of Ierae Security 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 7.2 (High) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: High
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
CVSS V2 Severity:
Base Metrics 9.0 (High) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single Instance
  • Confidentiality Impact: Complete
  • Integrity Impact: Complete
  • Availability Impact: Complete
The above CVSS base scores have been assigned for CVE-2022-26019

CVSS V3 Severity:
Base Metrics: 6.1 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Changed
  • Confidentiality Impact: Low
  • 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-2021-20729

CVSS V3 Severity:
Base Metrics: 5.4 (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: None
CVSS V2 Severity:
Base Metrics: 5.5 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2022-24299
Affected Products


Electric Sheep Fencing
  • pfSense CE versions 2.5.2 and earlier (CVE-2021-20729)
  • pfSense CE versions prior to 2.6.0 (CVE-2022-26019, CVE-2022-24299)
  • pfSense Plus versions 21.05 and earlier (CVE-2021-20729)
  • pfSense Plus versions prior to 22.01 (CVE-2022-26019, CVE-2022-24299)

Impact

* An arbitrary script may be executed on a user's web browser when following a malicious URL to visit the captive portal login page - CVE-2021-20729
* A user with the privilege to change NTP GPS settings may rewrite existing files on the file system, resulting to arbitrary command execution - CVE-2022-26019
* A user with the privilege to change OpenVPN client or server settings may execute arbitrary commands - CVE-2022-24299
Solution

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

Electric Sheep Fencing
CWE (What is CWE?)

  1. Improper Input Validation(CWE-20) [IPA Evaluation]
  2. Permissions(CWE-264) [IPA Evaluation]
  3. Cross-site Scripting(CWE-79) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2021-20729
  2. CVE-2022-26019
  3. CVE-2022-24299
References

  1. JVN : JVN#87751554
  2. National Vulnerability Database (NVD) : CVE-2021-20729
  3. National Vulnerability Database (NVD) : CVE-2022-26019
  4. National Vulnerability Database (NVD) : CVE-2022-24299
Revision History

  • [2022/03/15]
      Web page was published
  • [2024/06/21]
      References : Contents were added

Date Public2022/03/15
Date First Published2022/03/15
Date Last Updated2024/06/21