SSOAgent – OpenSSL TLS server denial-of-service (CVE-2021-3449)
| Advisory ID | CVE Number | Date discovered | Severity | Advisory revision |
|---|---|---|---|---|
| STORM-2021-018 | CVE-2021-3449 | 03/25/2021 | medium | v1 |
Vulnerability details
The SSOagent TLS server may crash if a maliciously crafted renegotiation ClientHello message is sent.
Impacted products
| Products | Severity | Detail |
|---|---|---|
| Stormshield Network Security | medium | SNS is impacted |
Revisions
| Version | Date | Description |
|---|---|---|
| v1 | 05/04/2021 | Initial release |
Stormshield Network Security |
CVSS v3.1 Overall Score: 4.5
|
Analysis |
Impacted version |
|
A vulnerability in OpenSSL’s secure renegociation system could lead to a remote denial of service of the SSOAgent. |
|
Workaround solution |
Solution |
|
There is no workaround. |
The version 3.0.1 fixes this vulnerability. |
| Attack Vector | Attack Complexity | Privileges Required | User Interaction | Scope | Confidentiality Impact | Integrity Impact | Availability impact |
|---|---|---|---|---|---|---|---|
| Network | Low | Low | None | Unchanged | None | None | Low |
| CVSS Base score: 4.3 | CVSS Vector: (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L) |
| Exploit Code Maturity | Remediation Level | Report Confidence |
|---|---|---|
| Proof of concept code | Official fix | Confirmed |
| CVSS Temporal score: 3.9 | CVSS Vector: (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C) |
| Confidentiality Requirement | Integrity Requirement | Availability Requirement |
|---|---|---|
| High | High | High |
| CVSS Environmental score: 4.5 | CVSS Vector: (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C/CR:H/IR:H/AR:H/MAV:X/MAC:X/MPR:X/MUI:X/MS:X/MC:X/MI:X/MA:X) |