CG-WLNCM4G may behave as an open resolver


CG-WLNCM4G provided by Corega Inc is a network camera. CG-WLNCM4G contains an issue where it may behave as an open resolver.

SASABE Tetsuro of The University of Tokyo 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 5.8 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Changed
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Low
CVSS V2 Severity:
Base Metrics 5.0 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Partial
Affected Products

Corega Inc


The device may be leveraged for use in a DNS amplification attack and unknowingly become a part of a DDoS attack.

[Do not use CG-WLNCM4G]
As of December 25, 2015, there are no practical solutions to this issue.
It is recommended to stop using CG-WLNCM4G according to the information provided by the developer.

According to the developer, the following products are not affected by this issue.

[Apply a Workaround]
The following workaround may mitigate the affects of this issue.
* Restrict access to the product from the internet, through router settings or other functions
Vendor Information

Corega Inc
CWE (What is CWE?)

  1. Permissions(CWE-264) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2015-7794

  1. JVN : JVN#51250073
  2. National Vulnerability Database (NVD) : CVE-2015-7794
Revision History

  • [2015/12/25]
      Web page was published
      References : Content was added