Denial of service with SIP
| Advisory ID | CVE Number | Date discovered | Severity | Advisory revision |
|---|---|---|---|---|
| STORM-2020-002 | 01/28/2020 | medium | v1 |
Vulnerability details
Potential denial of service of the UTM during SIP exchanges.
Impacted products
| Products | Severity | Detail |
|---|---|---|
| Stormshield Network Security | medium | impacted |
Revisions
| Version | Date | Description |
|---|---|---|
| v1 | 01/28/2020 | Initial release |
Stormshield Network Security |
CVSS v2 Overall Score: 5.3
|
Analysis |
Impacted version |
|
During SIP over TCP analysis the SNS engine can freeze due to internal memory error. An attacker can potentially forge traffic in order to cause a denial of service of the UTM. |
|
Workaround solution |
Solution |
|
Allow SIP exchanges only between trusted sources. |
The SNS 3.7.12, 3.10.2 and 4.0.3 updates fix this vulnerability. |
| Access vector | Access complexity | Authentication | Confidentiality impact | Integrity impact | Availability impact |
|---|---|---|---|---|---|
| Network | Medium | None | None | None | Complete |
| CVSS Base score: 7.1 | CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:C) |
| Exploitability | Remediation Level | Report Confidence |
|---|---|---|
| Unproven that exploit exists | Official fix | Confirmed |
| CVSS Temporal score: 5.3 | CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C) |
| Collateral Damage Potential | Target Distribution |
|---|---|
| None | High [76-100%] |
| CVSS Environmental score: 5.3 | CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C/CDP:N/TD:H/CR:ND/IR:ND/AR:ND) |