[Japanese]

JVNDB-2020-000083

Multiple vulnerabilities in Aterm SA3500G

Overview

Aterm SA3500G provided by NEC Corporation contains multiple vulnerabilities listed below.

* OS command injection (CWE-78) - CVE-2020-5635
* OS command injection (CWE-78) - CVE-2020-5636
* Improper Validation of Integrity Check Value (CWE-354) - CVE-2020-5637

These vulnerabilities were reported by the following persons to IPA, and JPCERT/CC coordinated coordinated with the developer under Information Security Early Warning Partnership.

CVE-2020-5635
Shu Yoshikoshi of NetAgent Co.,Ltd. (LAC Co., Ltd.)

CVE-2020-5636 and CVE-2020-5637
Narumi Hirai of NetAgent Co.,Ltd. (LAC Co., Ltd.)
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 8.8 (High) [IPA Score]
  • Attack Vector: Adjacent Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
CVSS V2 Severity:
Base Metrics 5.8 (Medium) [IPA Score]
  • Access Vector: Adjacent Network
  • Access Complexity: Low
  • Authentication: None
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: Partial
The above CVSS base scores have been assigned for CVE-2020-5635

CVSS V3 Severity:
Base Metrics: 6.8 (Medium) [IPA Score]
  • Attack Vector: Adjacent
  • 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: 5.2 (Medium) [IPA Score]
  • Access Vector: Adjacent Network
  • Access Complexity: Low
  • Authentication: Single
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: Partial
The above CVSS base scores have been assigned for CVE-2020-5636

CVSS V3 Severity:
Base Metrics: 6.8 (Medium) [IPA Score]
  • Attack Vector: Adjacent
  • 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: 5.2 (Medium) [IPA Score]
  • Access Vector: Adjacent Network
  • Access Complexity: Low
  • Authentication: Single
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: Partial
The above CVSS base scores have been assigned for CVE-2020-5637
Affected Products


NEC Corporation
  • Aterm SA3500G firmware versions prior to Ver. 3.5.9

Impact

* If an attacker who can access the device sends a specially crafted request to a specific URL, an arbitrary command may be executed - CVE-2020-5635
* If a user sends a specially crafted request to a specific URL while logged in to the management screen of the device, an arbitrary command may be executed - CVE-2020-5636
* An attacker who can access the management screen of the device may execute a malicious program - CVE-2020-5637
Solution

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

NEC Corporation
CWE (What is CWE?)

  1. Improper Input Validation(CWE-20) [IPA Evaluation]
  2. OS Command Injection(CWE-78) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2020-5635
  2. CVE-2020-5636
  3. CVE-2020-5637
References

  1. JVN : JVN#55917325
  2. National Vulnerability Database (NVD) : CVE-2020-5635
  3. National Vulnerability Database (NVD) : CVE-2020-5636
  4. National Vulnerability Database (NVD) : CVE-2020-5637
Revision History

  • [2020/12/11]
      Web page was published

Date Public2020/12/11
Date First Published2020/12/11
Date Last Updated2020/12/11