Published:2021/03/22 Last Updated:2021/03/22
JVN#12737530
UNIVERGE Aspire series PBX vulnerable to denial-of-service (DoS)
Overview
UNIVERGE Aspire series PBX provided by NEC Platforms, Ltd. contain a denial-of-service (DoS) vulnerability.
Products Affected
- UNIVERGE Aspire WX from 1.00 to 3.51
- UNIVERGE Aspire UX from 1.00 to 9.70
- UNIVERGE SV9100 from 1.00 to 10.70
- SL2100 from 1.00 to 3.00
Description
Remote system maintenance feature of UNIVERGE Aspire series PBX contain an issue in handling commands, which may cause a denial-of-service (DoS).
Impact
An attacker may cause system down and reboot of the products by sending a specially crafted command.
Solution
Update the Software
Update to the latest version according to the information provided by the developer.
The developer has released the following versions.
- UNIVERGE Aspire WX 4.00 or the later
- UNIVERGE Aspire UX 9.80 or the later
- UNIVERGE SV9100 11.00 or the later
- SL2100 3.10 or the later
Apply Workarounds
The following workarounds may mitigate the affects of this vulnerability.
- Disable the remote system maintenance feature.
- Do not directly connect the products to an external network such as the Internet.
Vendor Status
| Vendor | Link |
| NEC Platforms, Ltd. | Vulnerabilities of UNIVERGE Communication Products for SMB |
References
JPCERT/CC Addendum
Vulnerability Analysis by JPCERT/CC
CVSS v3
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Base Score:
3.1
| 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) |
CVSS v2
AV:N/AC:M/Au:S/C:N/I:N/A:P
Base Score:
3.5
| 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
NEC Platforms, Ltd. reported this vulnerability to IPA to notify users of its solution through JVN. JPCERT/CC and NEC Platforms, Ltd. coordinated under the 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-2021-20677 |
| JVN iPedia |
JVNDB-2021-000023 |