Vulnerability · Published Jan 31, 2022 · Assigned by mitre
CVE-2021-45079
Critical 9.1
In plain English
A critical-severity security flaw in the strongswan package (Alpine). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.8% (higher than 86% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)9.1Critical
Exploit odds (30 days)2.8%top 13.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | strongswan | 5.9.1-r4 | ALPINE-CVE-2021-45079 |
| Alpine:v3.21 | strongswan | 5.9.1-r4 | ALPINE-CVE-2021-45079 |
| Alpine:v3.22 | strongswan | 5.9.1-r4 | ALPINE-CVE-2021-45079 |
| Alpine:v3.23 | strongswan | 5.9.1-r4 | ALPINE-CVE-2021-45079 |
| Alpine:v3.24 | strongswan | 5.9.1-r4 | ALPINE-CVE-2021-45079 |
| Debian:12 | strongswan | 5.9.5-1 | DEBIAN-CVE-2021-45079 |
| Debian:13 | strongswan | 5.9.5-1 | DEBIAN-CVE-2021-45079 |
| Debian:14 | strongswan | 5.9.5-1 | DEBIAN-CVE-2021-45079 |
| Ubuntu:22.04:LTS | strongswan | 5.9.4-1ubuntu4 | UBUNTU-CVE-2021-45079 |