Critical severity9.1NVD Advisory· Published Jan 31, 2022· Updated Jun 17, 2026

CVE-2021-45079

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Fedoraproject/Extra Packages For Enterprise Linux3 versions
cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:7.0:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:9.0:*:*:*:*:*:*:*
Strongswan/Strongswan3 versions
cpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*range: >=4.1.2,<5.9.5
- (no CPE)
- (no CPE)range: <5.9.5
Canonical/Ubuntu Linux5 versions
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*+ 4 more
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*
Debian/linux3 versions
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Fedoraproject/Fedora2 versions
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
osv-coords40 versions
pkg:rpm/opensuse/strongswan&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/strongswan&distro=openSUSE%20Tumbleweed pkg:rpm/suse/strongswan&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/strongswan&distro=SUSE%20Enterprise%20Storage%206 pkg:rpm/suse/strongswan&distro=SUSE%20Enterprise%20Storage%207 pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-ESPOS pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP3 pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3 pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2015%20SP2 pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCL pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSS pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSS pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-BCL pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/strongswan&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP3 pkg:rpm/suse/strongswan&distro=SUSE%20Manager%20Proxy%204.1 pkg:rpm/suse/strongswan&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.1 pkg:rpm/suse/strongswan&distro=SUSE%20Manager%20Server%204.1 pkg:rpm/suse/strongswan&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/strongswan&distro=SUSE%20OpenStack%20Cloud%209 pkg:rpm/suse/strongswan&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/strongswan&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209
< 5.8.2-11.24.1+ 39 more
- (no CPE)range: < 5.8.2-11.24.1
- (no CPE)range: < 5.9.5-1.1
- (no CPE)range: < 5.1.3-26.20.1
- (no CPE)range: < 5.8.2-4.17.1
- (no CPE)range: < 5.8.2-11.24.1
- (no CPE)range: < 5.8.2-4.17.1
- (no CPE)range: < 5.8.2-4.17.1
- (no CPE)range: < 5.8.2-11.24.1
- (no CPE)range: < 5.8.2-11.24.1
- (no CPE)range: < 5.8.2-4.17.1
- (no CPE)range: < 5.8.2-4.17.1
- (no CPE)range: < 5.8.2-11.24.1
- (no CPE)range: < 5.8.2-11.24.1
- (no CPE)range: < 4.4.0-6.36.12.1
- (no CPE)range: < 5.8.2-11.24.1
- (no CPE)range: < 4.4.0-6.36.12.1
- (no CPE)range: < 5.1.3-26.20.1
- (no CPE)range: < 5.1.3-26.20.1
- (no CPE)range: < 5.1.3-26.20.1
- (no CPE)range: < 5.1.3-26.20.1
- (no CPE)range: < 5.1.3-26.20.1
- (no CPE)range: < 5.8.2-4.17.1
- (no CPE)range: < 5.8.2-4.17.1
- (no CPE)range: < 5.8.2-11.24.1
- (no CPE)range: < 5.8.2-11.24.1
- (no CPE)range: < 5.8.2-4.17.1
- (no CPE)range: < 5.1.3-26.20.1
- (no CPE)range: < 5.1.3-26.20.1
- (no CPE)range: < 5.1.3-26.20.1
- (no CPE)range: < 5.8.2-4.17.1
- (no CPE)range: < 5.8.2-4.17.1
- (no CPE)range: < 5.8.2-11.24.1
- (no CPE)range: < 5.8.2-11.24.1
- (no CPE)range: < 5.8.2-11.24.1
- (no CPE)range: < 5.8.2-11.24.1
- (no CPE)range: < 5.8.2-11.24.1
- (no CPE)range: < 5.1.3-26.20.1
- (no CPE)range: < 5.1.3-26.20.1
- (no CPE)range: < 5.1.3-26.20.1
- (no CPE)range: < 5.1.3-26.20.1

Patches

Vulnerability mechanics

References

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

News mentions

No linked articles in our index yet.

cvss	0.591
epss	0.002
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000