CVE-2021-37592
Publication date 19 November 2021
Last updated 26 August 2025
Ubuntu priority
Description
Suricata before 5.0.8 and 6.x before 6.0.4 allows TCP evasion via a client with a crafted TCP/IP stack that can send a certain sequence of segments.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| suricata | 25.10 questing |
Fixed 1:6.0.4-1
|
| 24.04 LTS noble |
Fixed 1:6.0.4-1
|
|
| 22.04 LTS jammy |
Fixed 1:6.0.4-1
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| 14.04 LTS trusty | Ignored end of standard support |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
9.8 · Critical
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |