CVE-2021-45079 is a critical vulnerability affecting strongSwan versions prior to 5.9.5, as well as canonical, debian, and fedoraproject distributions. It allows a malicious responder to bypass authentication by sending an EAP-Success message prematurely, potentially compromising client and server authentication in IKEv2 EAP-only scenarios. With a CVSS score of 9.1 (CRITICAL), this vulnerability is easily exploitable over the network with low attack complexity, leading to high confidentiality and availability impacts. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 4.1.2, < 5.9.5CPE matchmatch criteria | cpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:* | ||
9.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | ||
10.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | ||
11.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | ||
7.0CPE matchmatch criteria | cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:7.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
CVE-2021-45079
Feb 8, 2022In 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.
Jan 11, 2022