CVE-2015-4171 (GCVE-0-2015-4171)

Vulnerability from cvelistv5 – Published: 2015-06-10 18:00 – Updated: 2024-08-06 06:04
VLAI
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.
Severity
No CVSS data available.
CWE
  • n/a
Assigner
References
Date Public
2015-05-29 00:00
Show details on NVD website
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                    "criteria": "cpe:2.3:a:strongswan:strongswan:5.3.1:*:*:*:*:*:*:*",
                    "matchCriteriaId": "5C944A53-DF8C-4A86-95D0-A1035571E2FC",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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."
          },
          {
            "lang": "es",
            "value": "strongSwan 4.3.0 hasta 5.x anterior a 5.3.2 y strongSwan VPN Client anterior a 1.4.6, cuando utiliza claves EAP o precompartidas para la autenticaci\u00f3n de una conexi\u00f3n IKEv2, no refuerza las restricciones de autenticaci\u00f3n de servidores hasta que el proceso de autenticaci\u00f3n entero se haya completado, lo que permite a servidores remotos obtener credenciales mediante el uso de un certificado v\u00e1lido y posteriormente la lectura de las respuestas."
          }
        ],
        "id": "CVE-2015-4171",
        "lastModified": "2026-06-17T00:26:51.637",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "LOW",
              "cvssData": {
                "accessComplexity": "HIGH",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 2.6,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "NONE",
                "vectorString": "AV:N/AC:H/Au:N/C:P/I:N/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 4.9,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ]
        },
        "published": "2015-06-10T18:59:09.097",
        "references": [
          {
            "source": "cve@mitre.org",
            "url": "http://lists.opensuse.org/opensuse-updates/2015-06/msg00040.html"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Patch"
            ],
            "url": "http://www.debian.org/security/2015/dsa-3282"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://www.openwall.com/lists/oss-security/2015/05/29/6"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://www.openwall.com/lists/oss-security/2015/05/29/7"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://www.openwall.com/lists/oss-security/2015/06/08/4"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://www.securityfocus.com/bid/74933"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://www.securitytracker.com/id/1032514"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Patch"
            ],
            "url": "http://www.ubuntu.com/usn/USN-2628-1"
          },
          {
            "source": "cve@mitre.org",
            "url": "https://bugzilla.suse.com/show_bug.cgi?id=933591"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Patch"
            ],
            "url": "https://play.google.com/store/apps/details?id=org.strongswan.android"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://www.strongswan.org/blog/2015/06/08/strongswan-vulnerability-%2528cve-2015-4171%2529.html"
          },
          {
            "source": "cve@mitre.org",
            "url": "https://www.suse.com/security/cve/CVE-2015-4171.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.opensuse.org/opensuse-updates/2015-06/msg00040.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch"
            ],
            "url": "http://www.debian.org/security/2015/dsa-3282"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.openwall.com/lists/oss-security/2015/05/29/6"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.openwall.com/lists/oss-security/2015/05/29/7"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.openwall.com/lists/oss-security/2015/06/08/4"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.securityfocus.com/bid/74933"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.securitytracker.com/id/1032514"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch"
            ],
            "url": "http://www.ubuntu.com/usn/USN-2628-1"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://bugzilla.suse.com/show_bug.cgi?id=933591"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch"
            ],
            "url": "https://play.google.com/store/apps/details?id=org.strongswan.android"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://www.strongswan.org/blog/2015/06/08/strongswan-vulnerability-%2528cve-2015-4171%2529.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://www.suse.com/security/cve/CVE-2015-4171.html"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-200"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2025-11-21T12:18:00+00:00",
      "cve": "CVE-2015-4171",
      "id": "CVE-2015-4171",
      "initial_release_date": "2015-06-08T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "strongswan: rogue servers are able to gain user credentials from a client in certain IKEv2 setups",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2015/cve-2015-4171.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.