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5 vulnerabilities by strongswan

CVE-2026-25998 (GCVE-0-2026-25998)

Vulnerability from cvelistv5 – Published: 2026-02-19 15:51 – Updated: 2026-02-20 15:42
VLAI?
Title
strongMan vulnerable to private credential recovery due to key and counter reuse
Summary
strongMan is a management interface for strongSwan, an OpenSource IPsec-based VPN. When storing credentials in the database (private keys, EAP secrets), strongMan encrypts the corresponding database fields. So far it used AES in CTR mode with a global database key. Together with an initialization vector (IV), a key stream is generated to encrypt the data in the database fields. But because strongMan did not generate individual IVs, every database field was encrypted using the same key stream. An attacker that has access to the database can use this to recover the encrypted credentials. In particular, because certificates, which have to be considered public information, are also encrypted using the same mechanism, an attacker can directly recover a large chunk of the key stream, which allows them to decrypt basically all other secrets especially ECDSA private keys and EAP secrets, which are usually a lot shorter. Version 0.2.0 fixes the issue by switching to AES-GCM-SIV encryption with a random nonce and an individually derived encryption key, using HKDF, for each encrypted value. Database migrations are provided to automatically re-encrypt all credentials.
CWE
  • CWE-323 - Reusing a Nonce, Key Pair in Encryption
  • CWE-1204 - Generation of Weak Initialization Vector (IV)
Assigner
References
Impacted products
Vendor Product Version
strongswan strongMan Affected: < 0.2.0
Create a notification for this product.
Show details on NVD website

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CVE-2025-62291 (GCVE-0-2025-62291)

Vulnerability from cvelistv5 – Published: 2026-01-16 00:00 – Updated: 2026-01-16 19:07
VLAI?
Summary
In the eap-mschapv2 plugin (client-side) in strongSwan before 6.0.3, a malicious EAP-MSCHAPv2 server can send a crafted message of size 6 through 8, and cause an integer underflow that potentially results in a heap-based buffer overflow.
CWE
  • CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
Impacted products
Vendor Product Version
strongSwan strongSwan Affected: 4.2.12 , < 6.0.3 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2022-4967 (GCVE-0-2022-4967)

Vulnerability from cvelistv5 – Published: 2024-05-13 12:09 – Updated: 2025-02-13 16:38
VLAI?
Summary
strongSwan versions 5.9.2 through 5.9.5 are affected by authorization bypass through improper validation of certificate with host mismatch (CWE-297). When certificates are used to authenticate clients in TLS-based EAP methods, the IKE or EAP identity supplied by a client is not enforced to be contained in the client's certificate. So clients can authenticate with any trusted certificate and claim an arbitrary IKE/EAP identity as their own. This is problematic if the identity is used to make policy decisions. A fix was released in strongSwan version 5.9.6 in August 2022 (e4b4aabc4996fc61c37deab7858d07bc4d220136).
CWE
Assigner
Impacted products
Vendor Product Version
strongSwan strongSwan Affected: 5.9.2 , < 5.9.6 (semver)
Create a notification for this product.
Credits
Jan Schermer
Show details on NVD website

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CVE-2018-5389 (GCVE-0-2018-5389)

Vulnerability from cvelistv5 – Published: 2018-09-06 21:00 – Updated: 2024-08-05 05:33
VLAI?
Title
CVE-2018-5389
Summary
The Internet Key Exchange v1 main mode is vulnerable to offline dictionary or brute force attacks. Reusing a key pair across different versions and modes of IKE could lead to cross-protocol authentication bypasses. It is well known, that the aggressive mode of IKEv1 PSK is vulnerable to offline dictionary or brute force attacks. For the main mode, however, only an online attack against PSK authentication was thought to be feasible. This vulnerability could allow an attacker to recover a weak Pre-Shared Key or enable the impersonation of a victim host or network.
Severity ?
No CVSS data available.
Assigner
Impacted products
Vendor Product Version
strongSwan Strongswan Affected: 5.5.1
Create a notification for this product.
Show details on NVD website

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CVE-2018-5388 (GCVE-0-2018-5388)

Vulnerability from cvelistv5 – Published: 2018-05-31 00:00 – Updated: 2024-08-05 05:33
VLAI?
Summary
In stroke_socket.c in strongSwan before 5.6.3, a missing packet length check could allow a buffer underflow, which may lead to resource exhaustion and denial of service while reading from the socket.
Severity ?
No CVSS data available.
CWE
Assigner
Impacted products
Vendor Product Version
strongSwan strongSwan Affected: 5.6.3 , < 5.6.3 (custom)
Create a notification for this product.
Credits
Thanks to Kevin Backhouse for reporting this vulnerability.
Show details on NVD website

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            "url": "https://git.strongswan.org/?p=strongswan.git%3Ba=commitdiff%3Bh=0acd1ab4"
          },
          {
            "name": "104263",
            "tags": [
              "vdb-entry",
              "x_transferred"
            ],
            "url": "http://www.securityfocus.com/bid/104263"
          },
          {
            "name": "USN-3771-1",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/3771-1/"
          },
          {
            "name": "DSA-4229",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2018/dsa-4229"
          },
          {
            "name": "openSUSE-SU-2019:2594",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00077.html"
          },
          {
            "name": "openSUSE-SU-2019:2598",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00001.html"
          },
          {
            "name": "openSUSE-SU-2020:0403",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00047.html"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/172833/strongSwan-VPN-Charon-Server-Buffer-Overflow.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "strongSwan",
          "vendor": "strongSwan",
          "versions": [
            {
              "lessThan": "5.6.3",
              "status": "affected",
              "version": "5.6.3",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Thanks to Kevin Backhouse for reporting this vulnerability."
        }
      ],
      "datePublic": "2018-05-22T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "In stroke_socket.c in strongSwan before 5.6.3, a missing packet length check could allow a buffer underflow, which may lead to resource exhaustion and denial of service while reading from the socket."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-124",
              "description": "CWE-124",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-06-12T00:00:00.000Z",
        "orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
        "shortName": "certcc"
      },
      "references": [
        {
          "name": "VU#338343",
          "tags": [
            "third-party-advisory"
          ],
          "url": "http://www.kb.cert.org/vuls/id/338343"
        },
        {
          "name": "GLSA-201811-16",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.gentoo.org/glsa/201811-16"
        },
        {
          "url": "https://git.strongswan.org/?p=strongswan.git%3Ba=commitdiff%3Bh=0acd1ab4"
        },
        {
          "name": "104263",
          "tags": [
            "vdb-entry"
          ],
          "url": "http://www.securityfocus.com/bid/104263"
        },
        {
          "name": "USN-3771-1",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://usn.ubuntu.com/3771-1/"
        },
        {
          "name": "DSA-4229",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.debian.org/security/2018/dsa-4229"
        },
        {
          "name": "openSUSE-SU-2019:2594",
          "tags": [
            "vendor-advisory"
          ],
          "url": "http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00077.html"
        },
        {
          "name": "openSUSE-SU-2019:2598",
          "tags": [
            "vendor-advisory"
          ],
          "url": "http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00001.html"
        },
        {
          "name": "openSUSE-SU-2020:0403",
          "tags": [
            "vendor-advisory"
          ],
          "url": "http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00047.html"
        },
        {
          "url": "http://packetstormsecurity.com/files/172833/strongSwan-VPN-Charon-Server-Buffer-Overflow.html"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
    "assignerShortName": "certcc",
    "cveId": "CVE-2018-5388",
    "datePublished": "2018-05-31T00:00:00.000Z",
    "dateReserved": "2018-01-12T00:00:00.000Z",
    "dateUpdated": "2024-08-05T05:33:44.315Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}