JVN#51250073
CG-WLNCM4G may behave as an open resolver
Overview
CG-WLNCM4G contains an issue where it may behave as an open resolver.
Products Affected
- CG-WLNCM4G
Description
CG-WLNCM4G provided by Corega Inc is a network camera. CG-WLNCM4G contains an issue where it may behave as an open resolver.
Impact
The device may be leveraged for use in a DNS amplification attack and unknowingly become a part of a DDoS attack.
Solution
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.
- CG-NCBU031A
- CG-NCVD031A
- CG-NCDO011A
- CG-NCPFE011A
- CG-NCPVD032A
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 Status
| Vendor | Link |
| Corega Inc | About the issue that may behave as an open resolver |
References
JPCERT/CC Addendum
Vulnerability Analysis by JPCERT/CC
| Attack Vector(AV) | Physical (P) | Local (L) | Adjacent (A) | Network (N) |
|---|---|---|---|---|
| Attack Complexity(AC) | High (H) | Low (L) | ||
| Privileges Required(PR) | High (H) | Low (L) | None (N) | |
| User Interaction(UI) | Required (R) | None (N) | ||
| Scope(S) | Unchanged (U) | Changed (C) | ||
| Confidentiality Impact(C) | None (N) | Low (L) | High (H) | |
| Integrity Impact(I) | None (N) | Low (L) | High (H) | |
| Availability Impact(A) | None (N) | Low (L) | High (H) |
| Access Vector(AV) | Local (L) | Adjacent Network (A) | Network (N) |
|---|---|---|---|
| Access Complexity(AC) | High (H) | Medium (M) | Low (L) |
| Authentication(Au) | Multiple (M) | Single (S) | None (N) |
| Confidentiality Impact(C) | None (N) | Partial (P) | Complete (C) |
| Integrity Impact(I) | None (N) | Partial (P) | Complete (C) |
| Availability Impact(A) | None (N) | Partial (P) | Complete (C) |
Credit
SASABE Tetsuro of The University of Tokyo reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
Other Information
| JPCERT Alert |
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| JPCERT Reports |
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| CERT Advisory |
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| CPNI Advisory |
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| TRnotes |
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| CVE |
CVE-2015-7794 |
| JVN iPedia |
JVNDB-2015-000203 |