USN-8789-1 (UBUNTU-CVE-2026-78123)

Vulnerability from osv_ubuntu – Published: 2026-09-21 12:16 – Updated: 2026-09-21 12:16 – Source website
VLAI
Summary
strongswan vulnerabilities
Details

It was discovered that strongSwan incorrectly handled PKCS#7 containers in the openssl plugin. A remote attacker could possibly use this issue to cause strongSwan to crash, resulting in a denial of service. (CVE-2026-78123)

It was discovered that strongSwan incorrectly handled memory when enumerating certificates in PKCS#7 containers in the openssl plugin. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-78124)

It was discovered that strongSwan incorrectly handled AKA-Synchronization-Failure messages in the eap-aka plugin. A remote attacker could possibly use this issue to cause strongSwan to crash, resulting in a denial of service. (CVE-2026-78126)

It was discovered that strongSwan incorrectly handled memory when stringifying IKE messages. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-78127)

It was discovered that strongSwan incorrectly handled PKCS#5 decryption. A remote attacker could possibly use this issue to cause strongSwan to consume excessive resources, leading to a denial of service. (CVE-2026-78129)

It was discovered that strongSwan incorrectly handled attribute certificates in the x509 plugin when the issuer name was missing. A remote attacker could possibly use this issue to cause strongSwan to crash, resulting in a denial of service. (CVE-2026-78130)

It was discovered that strongSwan incorrectly handled memory when parsing attribute certificates in the x509 plugin. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-78131)

It was discovered that strongSwan incorrectly handled attribute certificates containing ietfAttrSyntax values in the x509 plugin. A remote attacker could possibly use this issue to cause strongSwan to consume excessive resources, leading to a denial of service. (CVE-2026-78132)

It was discovered that strongSwan incorrectly handled IKEv2 rekeying collisions with multi-key exchange. A remote attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-78133)

It was discovered that strongSwan incorrectly validated inner EAP method authentication details in the eap-ttls and eap-peap plugins. An authenticated user could possibly use this issue to bypass authentication. (CVE-2026-78134)

It was discovered that strongSwan incorrectly handled CREATE_CHILD_SA requests on unestablished IKE_SAs. A remote attacker could possibly use this issue to bypass authentication. (CVE-2026-78135)

References
To clipboard 

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        "6.0.4-1ubuntu2",
        "6.0.4-1ubuntu3",
        "6.0.4-1ubuntu3.1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that strongSwan incorrectly handled PKCS#7 containers\nin the openssl plugin. A remote attacker could possibly use this issue\nto cause strongSwan to crash, resulting in a denial of service.\n(CVE-2026-78123)\n\nIt was discovered that strongSwan incorrectly handled memory when\nenumerating certificates in PKCS#7 containers in the openssl plugin.\nA remote attacker could possibly use this issue to obtain sensitive\ninformation. (CVE-2026-78124)\n\nIt was discovered that strongSwan incorrectly handled\nAKA-Synchronization-Failure messages in the eap-aka plugin. A remote\nattacker could possibly use this issue to cause strongSwan to crash,\nresulting in a denial of service. (CVE-2026-78126)\n\nIt was discovered that strongSwan incorrectly handled memory when\nstringifying IKE messages. A remote attacker could possibly use this\nissue to obtain sensitive information. (CVE-2026-78127)\n\nIt was discovered that strongSwan incorrectly handled PKCS#5 decryption.\nA remote attacker could possibly use this issue to cause strongSwan to\nconsume excessive resources, leading to a denial of service.\n(CVE-2026-78129)\n\nIt was discovered that strongSwan incorrectly handled attribute\ncertificates in the x509 plugin when the issuer name was missing. A\nremote attacker could possibly use this issue to cause strongSwan to\ncrash, resulting in a denial of service. (CVE-2026-78130)\n\nIt was discovered that strongSwan incorrectly handled memory when\nparsing attribute certificates in the x509 plugin. A remote attacker\ncould possibly use this issue to obtain sensitive information.\n(CVE-2026-78131)\n\nIt was discovered that strongSwan incorrectly handled attribute\ncertificates containing ietfAttrSyntax values in the x509 plugin. A\nremote attacker could possibly use this issue to cause strongSwan to\nconsume excessive resources, leading to a denial of service.\n(CVE-2026-78132)\n\nIt was discovered that strongSwan incorrectly handled IKEv2 rekeying\ncollisions with multi-key exchange. A remote attacker could possibly\nuse this issue to execute arbitrary code. This issue only affected\nUbuntu 26.04 LTS. (CVE-2026-78133)\n\nIt was discovered that strongSwan incorrectly validated inner EAP\nmethod authentication details in the eap-ttls and eap-peap plugins.\nAn authenticated user could possibly use this issue to bypass\nauthentication. (CVE-2026-78134)\n\nIt was discovered that strongSwan incorrectly handled CREATE_CHILD_SA\nrequests on unestablished IKE_SAs. A remote attacker could possibly\nuse this issue to bypass authentication. (CVE-2026-78135)",
  "id": "USN-8789-1",
  "modified": "2026-09-21T12:16:30Z",
  "published": "2026-09-21T12:16:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8789-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-78123"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-78124"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-78126"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-78127"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-78129"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-78130"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-78131"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-78132"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-78133"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-78134"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-78135"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "strongswan vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-78123",
    "UBUNTU-CVE-2026-78124",
    "UBUNTU-CVE-2026-78126",
    "UBUNTU-CVE-2026-78127",
    "UBUNTU-CVE-2026-78129",
    "UBUNTU-CVE-2026-78130",
    "UBUNTU-CVE-2026-78131",
    "UBUNTU-CVE-2026-78132",
    "UBUNTU-CVE-2026-78133",
    "UBUNTU-CVE-2026-78134",
    "UBUNTU-CVE-2026-78135"
  ]
}



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