Vulnerability-Lookup

WID-SEC-W-2026-0887

Vulnerability from csaf_certbund - Published: 2026-03-26 23:00 - Updated: 2026-03-30 22:00

Summary

Internet Systems Consortium Kea: Schwachstelle ermöglicht Denial of Service

Severity

Mittel

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: Internet Systems Consortium (ISC) Kea ist eine Open-Source-DHCP-Server-Implementierung.

Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Internet Systems Consortium Kea ausnutzen, um einen Denial of Service Angriff durchzuführen.

Betroffene Betriebssysteme: - Linux - UNIX

CVE-2026-3608

References

URL

Category

	https://wid.cert-bund.de/.well-known/csaf/white/2…	self
	https://wid.cert-bund.de/portal/wid/securityadvis…	self
	https://kb.isc.org/docs/cve-2026-3608	external
	https://lists.opensuse.org/archives/list/security…	external
	https://bodhi.fedoraproject.org/updates/FEDORA-20…	external
	https://bodhi.fedoraproject.org/updates/FEDORA-20…	external
	https://bodhi.fedoraproject.org/updates/FEDORA-20…	external
	https://bodhi.fedoraproject.org/updates/FEDORA-20…	external
	https://bodhi.fedoraproject.org/updates/FEDORA-EP…	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Internet Systems Consortium (ISC) Kea ist eine Open-Source-DHCP-Server-Implementierung.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Internet Systems Consortium Kea ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- UNIX",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-0887 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0887.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-0887 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0887"
      },
      {
        "category": "external",
        "summary": "ISC Security Advisory vom 2026-03-26",
        "url": "https://kb.isc.org/docs/cve-2026-3608"
      },
      {
        "category": "external",
        "summary": "openSUSE Security Update OPENSUSE-SU-2026:10421-1 vom 2026-03-28",
        "url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/Z2NRLDD4JRHMJ7YIS3IGXRRVX4B3ZBIZ/"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2026-11E168602C vom 2026-03-30",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-11e168602c"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2026-2B21A4DAFE vom 2026-03-30",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-2b21a4dafe"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2026-66F19B11E0 vom 2026-03-30",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-66f19b11e0"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2026-04263E2A5B vom 2026-03-30",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-04263e2a5b"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-EPEL-2026-01EA52D899 vom 2026-03-30",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-01ea52d899"
      }
    ],
    "source_lang": "en-US",
    "title": "Internet Systems Consortium Kea: Schwachstelle erm\u00f6glicht Denial of Service",
    "tracking": {
      "current_release_date": "2026-03-30T22:00:00.000+00:00",
      "generator": {
        "date": "2026-03-31T08:09:15.834+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.5.0"
        }
      },
      "id": "WID-SEC-W-2026-0887",
      "initial_release_date": "2026-03-26T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-03-26T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-03-29T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von openSUSE aufgenommen"
        },
        {
          "date": "2026-03-30T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Fedora aufgenommen"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Fedora Linux",
            "product": {
              "name": "Fedora Linux",
              "product_id": "74185",
              "product_identification_helper": {
                "cpe": "cpe:/o:fedoraproject:fedora:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Fedora"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c2.6.5",
                "product": {
                  "name": "Internet Systems Consortium Kea \u003c2.6.5",
                  "product_id": "T052201"
                }
              },
              {
                "category": "product_version",
                "name": "2.6.5",
                "product": {
                  "name": "Internet Systems Consortium Kea 2.6.5",
                  "product_id": "T052201-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:isc:kea:2.6.5"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c3.0.3",
                "product": {
                  "name": "Internet Systems Consortium Kea \u003c3.0.3",
                  "product_id": "T052202"
                }
              },
              {
                "category": "product_version",
                "name": "3.0.3",
                "product": {
                  "name": "Internet Systems Consortium Kea 3.0.3",
                  "product_id": "T052202-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:isc:kea:3.0.3"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Kea"
          }
        ],
        "category": "vendor",
        "name": "Internet Systems Consortium"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "SUSE openSUSE",
            "product": {
              "name": "SUSE openSUSE",
              "product_id": "T027843",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:opensuse:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-3608",
      "product_status": {
        "known_affected": [
          "T027843",
          "T052201",
          "T052202",
          "74185"
        ]
      },
      "release_date": "2026-03-26T23:00:00.000+00:00",
      "title": "CVE-2026-3608"
    }
  ]
}

CVE-2026-3608 (GCVE-0-2026-3608)

Vulnerability from cvelistv5 – Published: 2026-03-25 08:46 – Updated: 2026-03-25 17:22

Title

Stack overflow in Kea daemons

Summary

Sending a maliciously crafted message to the kea-ctrl-agent, kea-dhcp-ddns, kea-dhcp4, or kea-dhcp6 daemons over any configured API socket or HA listener can cause the receiving daemon to exit with a stack overflow error. This issue affects Kea versions 2.6.0 through 2.6.4 and 3.0.0 through 3.0.2.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-617 - Reachable Assertion

Assigner

isc

References

URL

Tags

	https://kb.isc.org/docs/cve-2026-3608	vendor-advisory
	https://downloads.isc.org/isc/kea/2.6.5	patch
	https://downloads.isc.org/isc/kea/3.0.3	patch

Impacted products

	Vendor	Product	Version
	ISC	Kea	Affected: 2.6.0 , ≤ 2.6.4 (custom) Affected: 3.0.0 , ≤ 3.0.2 (custom)

Date Public ?

2026-03-25 00:00

Credits

ISC would like to thank Ali Norouzi of Keysight for bringing this vulnerability to our attention.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-3608",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-25T13:26:04.073699Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-25T13:26:12.153Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2026-03-25T17:22:19.777Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/03/25/6"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Kea",
          "vendor": "ISC",
          "versions": [
            {
              "lessThanOrEqual": "2.6.4",
              "status": "affected",
              "version": "2.6.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "3.0.2",
              "status": "affected",
              "version": "3.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:isc:kea:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "2.6.4",
                  "versionStartIncluding": "2.6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:isc:kea:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "3.0.2",
                  "versionStartIncluding": "3.0.0",
                  "vulnerable": true
                }
              ],
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "ISC would like to thank Ali Norouzi of Keysight for bringing this vulnerability to our attention."
        }
      ],
      "datePublic": "2026-03-25T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Sending a maliciously crafted message to the kea-ctrl-agent, kea-dhcp-ddns, kea-dhcp4, or kea-dhcp6 daemons over any configured API socket or HA listener can cause the receiving daemon to exit with a stack overflow error.\nThis issue affects Kea versions 2.6.0 through 2.6.4 and 3.0.0 through 3.0.2."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "We are not aware of any active exploits."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "Loss of DHCP services"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-617",
              "description": "CWE-617 Reachable Assertion",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-25T08:46:48.992Z",
        "orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
        "shortName": "isc"
      },
      "references": [
        {
          "name": "CVE-2026-3608",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://kb.isc.org/docs/cve-2026-3608"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://downloads.isc.org/isc/kea/2.6.5"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://downloads.isc.org/isc/kea/3.0.3"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to the patched release most closely related to your current version of Kea: 2.6.5 or 3.0.3."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Stack overflow in Kea daemons",
      "workarounds": [
        {
          "lang": "en",
          "value": "Securing the API sockets with TLS, and requiring the client to authenticate with a certificate (mutual authentication), prevents the attacker from establishing an API connection to Kea.  Set cert-required to true (the default) to require a client certificate.  See: https://kea.readthedocs.io/en/stable/arm/security.html#tls-https-configuration"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
    "assignerShortName": "isc",
    "cveId": "CVE-2026-3608",
    "datePublished": "2026-03-25T08:46:48.992Z",
    "dateReserved": "2026-03-05T17:47:36.088Z",
    "dateUpdated": "2026-03-25T17:22:19.777Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

WID-SEC-W-2026-0887

CVE-2026-3608 (GCVE-0-2026-3608)

Tags

Sightings

Nomenclature