strongSwan 4.3.0 through 5.x before 5.3.2 and strongSwan VPN Client before 1.4.6, when…
Priority LOW 17CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Partial · None · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-200.
Summary
strongSwan 4.3.0 through 5.x before 5.3.2 and strongSwan VPN Client before 1.4.6, when using EAP or pre-shared keys for authenticating an IKEv2 connection, does not enforce server authentication restrictions until the entire authentication process is complete, which allows remote servers to obtain credentials by using a valid certificate and then reading the responses.
Why it matters now
EPSS 0.02028 81st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 39
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:strongswan:strongswan_vpn_client:*:*:*:*:*:android:*:* | up to 1.4.5 | Vulnerable | strongSwan |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:* | 14.10 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:* | 15.04 | Vulnerable | Canonical |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:a:strongswan:strongswan:4.3.0:*:*:*:*:*:*:* | 4.3.0 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.3.1:*:*:*:*:*:*:* | 4.3.1 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.3.2:*:*:*:*:*:*:* | 4.3.2 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.3.3:*:*:*:*:*:*:* | 4.3.3 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.3.4:*:*:*:*:*:*:* | 4.3.4 | Vulnerable | strongSwan |
- cpe:2.3:a:strongswan:strongswan_vpn_client:*:*:*:*:*:android:*:* Versions up to 1.4.5 Vulnerable ·strongSwan
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:* Versions 14.10 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:* Versions 15.04 Vulnerable ·Canonical
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:a:strongswan:strongswan:4.3.0:*:*:*:*:*:*:* Versions 4.3.0 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.3.1:*:*:*:*:*:*:* Versions 4.3.1 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.3.2:*:*:*:*:*:*:* Versions 4.3.2 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.3.3:*:*:*:*:*:*:* Versions 4.3.3 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.3.4:*:*:*:*:*:*:* Versions 4.3.4 Vulnerable ·strongSwan
Show 29 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:strongswan:strongswan:4.3.5:*:*:*:*:*:*:* | 4.3.5 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.3.6:*:*:*:*:*:*:* | 4.3.6 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.3.7:*:*:*:*:*:*:* | 4.3.7 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.4.0:*:*:*:*:*:*:* | 4.4.0 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.4.1:*:*:*:*:*:*:* | 4.4.1 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.5.0:*:*:*:*:*:*:* | 4.5.0 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.5.1:*:*:*:*:*:*:* | 4.5.1 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.5.2:*:*:*:*:*:*:* | 4.5.2 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.5.3:*:*:*:*:*:*:* | 4.5.3 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.6.0:*:*:*:*:*:*:* | 4.6.0 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.6.1:*:*:*:*:*:*:* | 4.6.1 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.6.2:*:*:*:*:*:*:* | 4.6.2 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.6.3:*:*:*:*:*:*:* | 4.6.3 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:4.6.4:*:*:*:*:*:*:* | 4.6.4 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:5.0.0:*:*:*:*:*:*:* | 5.0.0 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:5.0.1:*:*:*:*:*:*:* | 5.0.1 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:5.0.2:*:*:*:*:*:*:* | 5.0.2 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:5.0.3:*:*:*:*:*:*:* | 5.0.3 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:5.0.4:*:*:*:*:*:*:* | 5.0.4 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:5.1.0:*:*:*:*:*:*:* | 5.1.0 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:5.1.1:*:*:*:*:*:*:* | 5.1.1 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:5.1.2:*:*:*:*:*:*:* | 5.1.2 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:5.1.3:*:*:*:*:*:*:* | 5.1.3 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:5.2.0:*:*:*:*:*:*:* | 5.2.0 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:5.2.1:*:*:*:*:*:*:* | 5.2.1 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:5.2.2:*:*:*:*:*:*:* | 5.2.2 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:5.2.3:*:*:*:*:*:*:* | 5.2.3 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:5.3.0:*:*:*:*:*:*:* | 5.3.0 | Vulnerable | strongSwan |
| cpe:2.3:a:strongswan:strongswan:5.3.1:*:*:*:*:*:*:* | 5.3.1 | Vulnerable | strongSwan |
- cpe:2.3:a:strongswan:strongswan:4.3.5:*:*:*:*:*:*:* Versions 4.3.5 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.3.6:*:*:*:*:*:*:* Versions 4.3.6 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.3.7:*:*:*:*:*:*:* Versions 4.3.7 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.4.0:*:*:*:*:*:*:* Versions 4.4.0 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.4.1:*:*:*:*:*:*:* Versions 4.4.1 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.5.0:*:*:*:*:*:*:* Versions 4.5.0 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.5.1:*:*:*:*:*:*:* Versions 4.5.1 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.5.2:*:*:*:*:*:*:* Versions 4.5.2 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.5.3:*:*:*:*:*:*:* Versions 4.5.3 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.6.0:*:*:*:*:*:*:* Versions 4.6.0 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.6.1:*:*:*:*:*:*:* Versions 4.6.1 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.6.2:*:*:*:*:*:*:* Versions 4.6.2 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.6.3:*:*:*:*:*:*:* Versions 4.6.3 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:4.6.4:*:*:*:*:*:*:* Versions 4.6.4 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:5.0.0:*:*:*:*:*:*:* Versions 5.0.0 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:5.0.1:*:*:*:*:*:*:* Versions 5.0.1 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:5.0.2:*:*:*:*:*:*:* Versions 5.0.2 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:5.0.3:*:*:*:*:*:*:* Versions 5.0.3 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:5.0.4:*:*:*:*:*:*:* Versions 5.0.4 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:5.1.0:*:*:*:*:*:*:* Versions 5.1.0 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:5.1.1:*:*:*:*:*:*:* Versions 5.1.1 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:5.1.2:*:*:*:*:*:*:* Versions 5.1.2 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:5.1.3:*:*:*:*:*:*:* Versions 5.1.3 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:5.2.0:*:*:*:*:*:*:* Versions 5.2.0 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:5.2.1:*:*:*:*:*:*:* Versions 5.2.1 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:5.2.2:*:*:*:*:*:*:* Versions 5.2.2 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:5.2.3:*:*:*:*:*:*:* Versions 5.2.3 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:5.3.0:*:*:*:*:*:*:* Versions 5.3.0 Vulnerable ·strongSwan
- cpe:2.3:a:strongswan:strongswan:5.3.1:*:*:*:*:*:*:* Versions 5.3.1 Vulnerable ·strongSwan
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
Not affected: 1 product
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2015-4171
- 2026-10-03 Alias added: GHSA-mg6m-fcfp-8xqm
References
Patch 4
Advisory 1
Other 5
- [oss-security] 20150608 Re: StrongSwan VPN client for Android leaks username to rouge server
- https://www.suse.com/security/cve/CVE-2015-4171.html
- [oss-security] 20150529 StrongSwan VPN client for Android leaks username to rouge server
- [oss-security] 20150529 Re: StrongSwan VPN client for Android leaks username to rouge server
- https://bugzilla.suse.com/show_bug.cgi?id=933591
Sources
- CVE-2015-4171 · CVE Program
- CVE-2015-4171 · NVD
- FIRST EPSS
- GHSA-mg6m-fcfp-8xqm · GitHub Advisory Database · CC BY 4.0
- CVE-2015-4171 · Red Hat security data · CC BY 4.0
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