CVE-2021-45079
Publication date 24 January 2022
Last updated 18 August 2025
Ubuntu priority
Description
In strongSwan before 5.9.5, a malicious responder can send an EAP-Success message too early without actually authenticating the client and (in the case of EAP methods with mutual authentication and EAP-only authentication for IKEv2) even without server authentication.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| strongswan | 25.10 questing |
Fixed 5.9.4-1ubuntu4
|
| 25.04 plucky |
Fixed 5.9.4-1ubuntu4
|
|
| 24.04 LTS noble |
Fixed 5.9.4-1ubuntu4
|
|
| 22.04 LTS jammy |
Fixed 5.9.4-1ubuntu4
|
|
| 20.04 LTS focal |
Fixed 5.8.2-1ubuntu3.4
|
|
| 18.04 LTS bionic |
Fixed 5.6.2-1ubuntu2.8
|
|
| 16.04 LTS xenial |
Fixed 5.3.5-1ubuntu3.8+esm2
|
|
| 14.04 LTS trusty |
Fixed 5.1.2-0ubuntu2.11+esm2
|
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| Parameter | Value |
|---|---|
| Base score |
9.1 · Critical
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-5250-1
- strongSwan vulnerability
- 24 January 2022
- USN-5250-2
- strongSwan vulnerability
- 24 January 2022