CVE-2021-45079
strongswan - security update
9.1
CRITICAL
CVSS 3.1
EPSS 0.12%
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.
How to fix CVE-2021-45079
To remediate CVE-2021-45079, upgrade the affected package to a fixed version below.
- —upgrade to 5.9.1-r2 or later
- —upgrade to 5.9.1-1+deb11u2 or later
- —upgrade to 5.5.1-4+deb9u6 or later
- —upgrade to 5.7.2-1+deb10u2 or later
Is CVE-2021-45079 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 5.9.1-r2
- from 0, < 5.9.1-1+deb11u2
- from 0, < 5.5.1-4+deb9u6
- from 0, < 5.7.2-1+deb10u2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |