CVE-2021-45079
libcharon-extauth-plugins: In strongSwan before 5.9.5, a malicious responder can send an EAP-Successmessage too early without actually authentic...
CVE-2021-45079 is fixed in 21 products on 1 platform, first by DSA-5056-1, released January 24, 2022. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
9.1
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0276
86th percentile
In strongSwan before 5.9.5, a malicious responder can send an EAP-Successmessage too early without actually authenticating the client and (in thecase of EAP methods with mutual authentication and EAP-only authenticationfor IKEv2) even without server authentication.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| charon-cmd · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | charon-cmd 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| charon-cmd · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | charon-cmd 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| charon-cmd · Ubuntu 22.04.1 LTS (jammy) | 5.9.4-1ubuntu4 | charon-cmd 5.9.4-1ubuntu4 | Jan 24, 2022 |
| charon-cmd · Ubuntu 24.10 (oracular) | 5.9.4-1ubuntu4 | charon-cmd 5.9.4-1ubuntu4 | Jan 16, 2026 |
| charon-cmd · Ubuntu 25.04 (plucky) | 5.9.4-1ubuntu4 | charon-cmd 5.9.4-1ubuntu4 | Jan 16, 2026 |
| charon-systemd · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | charon-systemd 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| charon-systemd · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | charon-systemd 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| charon-systemd · Ubuntu 22.04.1 LTS (jammy) | 5.9.4-1ubuntu4 | charon-systemd 5.9.4-1ubuntu4 | Jan 24, 2022 |
| charon-systemd · Ubuntu 24.10 (oracular) | 5.9.4-1ubuntu4 | charon-systemd 5.9.4-1ubuntu4 | Jan 16, 2026 |
| charon-systemd · Ubuntu 25.04 (plucky) | 5.9.4-1ubuntu4 | charon-systemd 5.9.4-1ubuntu4 | Jan 16, 2026 |
| libcharon-extauth-plugins · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | libcharon-extauth-plugins 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| libcharon-extauth-plugins · Ubuntu 22.04.1 LTS (jammy) | 5.9.4-1ubuntu4 | libcharon-extauth-plugins 5.9.4-1ubuntu4 | Jan 24, 2022 |
| libcharon-extauth-plugins · Ubuntu 24.10 (oracular) | 5.9.4-1ubuntu4 | libcharon-extauth-plugins 5.9.4-1ubuntu4 | Jan 16, 2026 |
| libcharon-extauth-plugins · Ubuntu 25.04 (plucky) | 5.9.4-1ubuntu4 | libcharon-extauth-plugins 5.9.4-1ubuntu4 | Jan 16, 2026 |
| libcharon-extra-plugins · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | libcharon-extra-plugins 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| libcharon-extra-plugins · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | libcharon-extra-plugins 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| libcharon-extra-plugins · Ubuntu 22.04.1 LTS (jammy) | 5.9.4-1ubuntu4 | libcharon-extra-plugins 5.9.4-1ubuntu4 | Jan 24, 2022 |
| libcharon-extra-plugins · Ubuntu 24.10 (oracular) | 5.9.4-1ubuntu4 | libcharon-extra-plugins 5.9.4-1ubuntu4 | Jan 16, 2026 |
| libcharon-extra-plugins · Ubuntu 25.04 (plucky) | 5.9.4-1ubuntu4 | libcharon-extra-plugins 5.9.4-1ubuntu4 | Jan 16, 2026 |
| libcharon-standard-plugins · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | libcharon-standard-plugins 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| libcharon-standard-plugins · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | libcharon-standard-plugins 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| libstrongswan · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | libstrongswan 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| libstrongswan · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | libstrongswan 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| libstrongswan · Ubuntu 22.04.1 LTS (jammy) | 5.9.4-1ubuntu4 | libstrongswan 5.9.4-1ubuntu4 | Jan 24, 2022 |
| libstrongswan · Ubuntu 24.10 (oracular) | 5.9.4-1ubuntu4 | libstrongswan 5.9.4-1ubuntu4 | Jan 16, 2026 |
| libstrongswan · Ubuntu 25.04 (plucky) | 5.9.4-1ubuntu4 | libstrongswan 5.9.4-1ubuntu4 | Jan 16, 2026 |
| libstrongswan-extra-plugins · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | libstrongswan-extra-plugins 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| libstrongswan-extra-plugins · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | libstrongswan-extra-plugins 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| libstrongswan-extra-plugins · Ubuntu 22.04.1 LTS (jammy) | 5.9.4-1ubuntu4 | libstrongswan-extra-plugins 5.9.4-1ubuntu4 | Jan 24, 2022 |
| libstrongswan-extra-plugins · Ubuntu 24.10 (oracular) | 5.9.4-1ubuntu4 | libstrongswan-extra-plugins 5.9.4-1ubuntu4 | Jan 16, 2026 |
| libstrongswan-extra-plugins · Ubuntu 25.04 (plucky) | 5.9.4-1ubuntu4 | libstrongswan-extra-plugins 5.9.4-1ubuntu4 | Jan 16, 2026 |
| libstrongswan-standard-plugins · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | libstrongswan-standard-plugins 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| libstrongswan-standard-plugins · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | libstrongswan-standard-plugins 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| libstrongswan-standard-plugins · Ubuntu 22.04.1 LTS (jammy) | 5.9.4-1ubuntu4 | libstrongswan-standard-plugins 5.9.4-1ubuntu4 | Jan 24, 2022 |
| libstrongswan-standard-plugins · Ubuntu 24.10 (oracular) | 5.9.4-1ubuntu4 | libstrongswan-standard-plugins 5.9.4-1ubuntu4 | Jan 16, 2026 |
| libstrongswan-standard-plugins · Ubuntu 25.04 (plucky) | 5.9.4-1ubuntu4 | libstrongswan-standard-plugins 5.9.4-1ubuntu4 | Jan 16, 2026 |
| strongswan · Debian 11.6 (bullseye) | 5.9.1-1+deb11u2 | DSA-5056-1 | Jan 24, 2022 |
| strongswan · Debian 12.15 (bookworm) | 5.9.5-1 | DEBIAN-CVE-2021-45079 | Jan 31, 2022 |
| strongswan · Debian 13.5 (trixie) | 5.9.5-1 | DEBIAN-CVE-2021-45079 | Jan 31, 2022 |
| strongswan · Debian 14 | 5.9.5-1 | DEBIAN-CVE-2021-45079 | Jan 31, 2022 |
| strongswan · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | strongswan 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| strongswan · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | strongswan 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| strongswan · Ubuntu 22.04.1 LTS (jammy) | 5.9.4-1ubuntu4 | strongswan 5.9.4-1ubuntu4 | Jan 24, 2022 |
| strongswan · Ubuntu 24.10 (oracular) | 5.9.4-1ubuntu4 | strongswan 5.9.4-1ubuntu4 | Jan 16, 2026 |
| strongswan · Ubuntu 25.04 (plucky) | 5.9.4-1ubuntu4 | strongswan 5.9.4-1ubuntu4 | Jan 16, 2026 |
| strongswan-charon · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | strongswan-charon 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| strongswan-charon · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | strongswan-charon 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| strongswan-charon · Ubuntu 22.04.1 LTS (jammy) | 5.9.4-1ubuntu4 | strongswan-charon 5.9.4-1ubuntu4 | Jan 24, 2022 |
| strongswan-charon · Ubuntu 24.10 (oracular) | 5.9.4-1ubuntu4 | strongswan-charon 5.9.4-1ubuntu4 | Jan 16, 2026 |
| strongswan-charon · Ubuntu 25.04 (plucky) | 5.9.4-1ubuntu4 | strongswan-charon 5.9.4-1ubuntu4 | Jan 16, 2026 |
| strongswan-libcharon · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | strongswan-libcharon 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| strongswan-libcharon · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | strongswan-libcharon 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| strongswan-libcharon · Ubuntu 22.04.1 LTS (jammy) | 5.9.4-1ubuntu4 | strongswan-libcharon 5.9.4-1ubuntu4 | Jan 24, 2022 |
| strongswan-libcharon · Ubuntu 24.10 (oracular) | 5.9.4-1ubuntu4 | strongswan-libcharon 5.9.4-1ubuntu4 | Jan 16, 2026 |
| strongswan-libcharon · Ubuntu 25.04 (plucky) | 5.9.4-1ubuntu4 | strongswan-libcharon 5.9.4-1ubuntu4 | Jan 16, 2026 |
| strongswan-nm · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | strongswan-nm 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| strongswan-nm · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | strongswan-nm 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| strongswan-nm · Ubuntu 22.04.1 LTS (jammy) | 5.9.4-1ubuntu4 | strongswan-nm 5.9.4-1ubuntu4 | Jan 24, 2022 |
| strongswan-nm · Ubuntu 24.10 (oracular) | 5.9.4-1ubuntu4 | strongswan-nm 5.9.4-1ubuntu4 | Jan 16, 2026 |
| strongswan-nm · Ubuntu 25.04 (plucky) | 5.9.4-1ubuntu4 | strongswan-nm 5.9.4-1ubuntu4 | Jan 16, 2026 |
| strongswan-pki · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | strongswan-pki 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| strongswan-pki · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | strongswan-pki 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| strongswan-pki · Ubuntu 22.04.1 LTS (jammy) | 5.9.4-1ubuntu4 | strongswan-pki 5.9.4-1ubuntu4 | Jan 24, 2022 |
| strongswan-pki · Ubuntu 24.10 (oracular) | 5.9.4-1ubuntu4 | strongswan-pki 5.9.4-1ubuntu4 | Jan 16, 2026 |
| strongswan-pki · Ubuntu 25.04 (plucky) | 5.9.4-1ubuntu4 | strongswan-pki 5.9.4-1ubuntu4 | Jan 16, 2026 |
| strongswan-scepclient · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | strongswan-scepclient 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| strongswan-scepclient · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | strongswan-scepclient 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| strongswan-scepclient · Ubuntu 22.04.1 LTS (jammy) | 5.9.4-1ubuntu4 | strongswan-scepclient 5.9.4-1ubuntu4 | Jan 24, 2022 |
| strongswan-starter · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | strongswan-starter 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| strongswan-starter · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | strongswan-starter 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| strongswan-starter · Ubuntu 22.04.1 LTS (jammy) | 5.9.4-1ubuntu4 | strongswan-starter 5.9.4-1ubuntu4 | Jan 24, 2022 |
| strongswan-starter · Ubuntu 24.10 (oracular) | 5.9.4-1ubuntu4 | strongswan-starter 5.9.4-1ubuntu4 | Jan 16, 2026 |
| strongswan-starter · Ubuntu 25.04 (plucky) | 5.9.4-1ubuntu4 | strongswan-starter 5.9.4-1ubuntu4 | Jan 16, 2026 |
| strongswan-swanctl · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | strongswan-swanctl 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| strongswan-swanctl · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | strongswan-swanctl 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| strongswan-swanctl · Ubuntu 22.04.1 LTS (jammy) | 5.9.4-1ubuntu4 | strongswan-swanctl 5.9.4-1ubuntu4 | Jan 24, 2022 |
| strongswan-swanctl · Ubuntu 24.10 (oracular) | 5.9.4-1ubuntu4 | strongswan-swanctl 5.9.4-1ubuntu4 | Jan 16, 2026 |
| strongswan-swanctl · Ubuntu 25.04 (plucky) | 5.9.4-1ubuntu4 | strongswan-swanctl 5.9.4-1ubuntu4 | Jan 16, 2026 |
| strongswan-tnc-base · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | strongswan-tnc-base 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| strongswan-tnc-base · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | strongswan-tnc-base 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| strongswan-tnc-client · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | strongswan-tnc-client 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| strongswan-tnc-client · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | strongswan-tnc-client 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| strongswan-tnc-ifmap · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | strongswan-tnc-ifmap 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| strongswan-tnc-ifmap · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | strongswan-tnc-ifmap 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| strongswan-tnc-pdp · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | strongswan-tnc-pdp 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| strongswan-tnc-pdp · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | strongswan-tnc-pdp 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
| strongswan-tnc-server · Ubuntu 18.04.6 LTS (bionic) | 5.6.2-1ubuntu2.8 | strongswan-tnc-server 5.6.2-1ubuntu2.8 | Jan 24, 2022 |
| strongswan-tnc-server · Ubuntu 20.04 LTS (focal) | 5.8.2-1ubuntu3.4 | strongswan-tnc-server 5.8.2-1ubuntu3.4 | Jan 24, 2022 |
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