# DSA-5056-1: strongswan security update

DSA-5056-1, released January 24, 2022, fixes 1 CVE in strongswan (version 5.9.1-1+deb11u2). None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/dsa-5056-1
- Platform: Linux
- Released: Jan 24, 2022
- Priority: High (Closes CVE-2021-45079, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2021-45079

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [strongswan](https://patchblox.com/security/data/product/linux/strongswan.md) | Debian 11.6 (bullseye) | 5.9.1-1+deb11u2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-45079](https://patchblox.com/security/data/cve/CVE-2021-45079.md) | High | libcharon-extauth-plugins: In strongSwan before 5.9.5, a malicious responder can send an EAP-Successmessage too early without actually authentic... | 9.1 | 0.0276 |  |

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Data as of 2026-11-07T06:34:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo