CVE-2021-45079
Gentoo Linux Security Advisory 202405-08
Severity Score
9.1
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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.
En strongSwan versiones anteriores a 5.9.5, un respondedor malicioso puede enviar un mensaje EAP-Success demasiado pronto sin autenticar realmente al cliente y (en el caso de los métodos EAP con autenticación mutua y autenticación sólo EAP para IKEv2) incluso sin autenticación del servidor
USN-5250-1 fixed a vulnerability in strongSwan. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. Zhuowei Zhang discovered that stringSwan incorrectly handled EAP authentication. A remote attacker could use this issue to cause strongSwan to crash, resulting in a denial of service, or possibly bypass client and server authentication.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-12-16 CVE Reserved
- 2022-01-25 CVE Published
- 2024-08-04 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-476: NULL Pointer Dereference
CAPEC
References (1)
| URL | Tag | Source |
|---|---|---|
| https://www.strongswan.org/blog/2022/01/24/strongswan-vulnerability-%28cve-2021-45079%29.html | X_refsource_misc |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Strongswan Search vendor "Strongswan" | Strongswan Search vendor "Strongswan" for product "Strongswan" | >= 4.1.2 < 5.9.5 Search vendor "Strongswan" for product "Strongswan" and version " >= 4.1.2 < 5.9.5" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Extra Packages For Enterprise Linux Search vendor "Fedoraproject" for product "Extra Packages For Enterprise Linux" | 7.0 Search vendor "Fedoraproject" for product "Extra Packages For Enterprise Linux" and version "7.0" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Extra Packages For Enterprise Linux Search vendor "Fedoraproject" for product "Extra Packages For Enterprise Linux" | 8.0 Search vendor "Fedoraproject" for product "Extra Packages For Enterprise Linux" and version "8.0" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Extra Packages For Enterprise Linux Search vendor "Fedoraproject" for product "Extra Packages For Enterprise Linux" | 9.0 Search vendor "Fedoraproject" for product "Extra Packages For Enterprise Linux" and version "9.0" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 34 Search vendor "Fedoraproject" for product "Fedora" and version "34" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 35 Search vendor "Fedoraproject" for product "Fedora" and version "35" | - |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04" | esm |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04" | esm |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04" | lts |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 20.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "20.04" | lts |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 21.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "21.10" | - |
Affected
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