OpenSSL TLS server denial-of-service (CVE-2021-3449)
| Advisory ID | CVE Number | Date discovered | Severity | Advisory revision |
|---|---|---|---|---|
| STORM-2021-009 | CVE-2021-3449 | 03/25/2021 | medium | v1 |
Vulnerability details
An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message.
Impacted products
| Products | Severity | Detail |
|---|---|---|
| Stormshield Network Security | medium | SNS is impacted |
Revisions
| Version | Date | Description |
|---|---|---|
| v1 | 05/27/2021 | Initial release |
Stormshield Network Security |
CVSS v3.1 Overall Score: 5.1
|
Analysis |
Impacted version |
|
A bug in OpenSSL’s secure renegociation system could lead to a remote denial of service on multiple services running on SNS. |
|
Workaround solution |
Solution |
|
There is no workaround. |
The 4.2.2 update fixes this vulnerability. |
| Attack Vector | Attack Complexity | Privileges Required | User Interaction | Scope | Confidentiality Impact | Integrity Impact | Availability impact |
|---|---|---|---|---|---|---|---|
| Adjacent Network | Low | None | None | Changed | None | None | Low |
| CVSS Base score: 4.7 | CVSS Vector: (AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L) |
| Exploit Code Maturity | Remediation Level | Report Confidence |
|---|---|---|
| Proof of concept code | Official fix | Confirmed |
| CVSS Temporal score: 4.2 | CVSS Vector: (AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L/E:P/RL:O/RC:C) |
| Confidentiality Requirement (CR) | Integrity Requirement (IR) | Availability Requirement (AR) |
|---|---|---|
| High | High | High |
| CVSS Environmental score: 5.1 | CVSS Vector: (AV:A/AC:L/PR:N/UI:N/S:C/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) |