CVE-2015-4171

lowpriority · track · 11EPSS 0.020 · 81 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.03% (81st) EPSS

CVSS 2.6 · low

Is it mine?

40 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-28

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.

cvss

Technical severity, 0–10. One row per scoring source.

2.6

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.02.6lowAV:N/AC:H/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 4.9 · impact 2.9

v2.02.2lowAV:N/AC:H/Au:N/C:P/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-200USprimary

affected products (40)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
canonical ubuntu linux= 14.04nvdUScpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:*:*:*:*
canonical ubuntu linux= 14.10nvdUScpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:*:*:*:*
canonical ubuntu linux= 15.04nvdUScpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:*:*:*:*
debian debian linux= 8.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
strongswan strongswan= 4.3.0nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 4.3.1nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 4.3.2nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 4.3.3nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 4.3.4nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 4.3.5nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 4.3.6nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 4.3.7nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 4.4.0nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 4.4.1nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 4.5.0nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 4.5.1nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 4.5.2nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 4.5.3nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 4.6.0nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*

showing 20 of 40

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2015-06-10modified 2026-06-17

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+19458 more

references (33)

External citations — patches, advisories, analysis.

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