Critical severity · published Jan 31, 2022
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 (in the case of EAP methods with mutual…
9.1
CVSS
2.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.8% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
9.0; 10.0; 11.0 · source: NVD
EP
Extra Packages For Enterprise Linux · Fedoraproject
7.0; 8.0; 9.0 · source: NVD
FE
Fedora · Fedoraproject
34; 35 · source: NVD
ST
Strongswan · Strongswan
4.1.2 before 5.9.5 · source: NVD
UL
Ubuntu Linux · Canonical
14.04; 16.04; 18.04; 20.04; 21.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-45079
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-45079
www.strongswan.org
https://www.strongswan.org/blog/2022/01/24/strongswan-vulnerability-%28cve-2021-45079%29.html
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