csaf_certbund - wid-sec-w-2023-1352

WID-SEC-W-2023-1352

Vulnerability from csaf_certbund - Published: 2021-12-13 23:00 - Updated: 2024-04-22 22:00

Summary

TLS Implementierungen: Schwachstelle ermöglicht Denial of Service

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

Transport Layer Security (TLS) ist ein hybrides Verschlüsselungsprotokoll zur Datenübertragung im Internet.

Angriff

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in verschiedenen TLS Implementierungen ausnutzen, um einen Denial of Service Angriff durchzuführen.

Betroffene Betriebssysteme

- Linux - Sonstiges - UNIX - Windows

JSON

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{
  "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": "Transport Layer Security (TLS) ist ein hybrides Verschl\u00fcsselungsprotokoll zur Daten\u00fcbertragung im Internet.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in verschiedenen TLS Implementierungen ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- Sonstiges\n- UNIX\n- Windows",
        "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-2023-1352 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2021/wid-sec-w-2023-1352.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2023-1352 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-1352"
      },
      {
        "category": "external",
        "summary": "D(HE)ater proof of concept vom 2021-12-06",
        "url": "https://github.com/Balasys/dheater"
      },
      {
        "category": "external",
        "summary": "SUSE Security Alert on DHEater aka CVE-2002-20001 vom 2021-12-07",
        "url": "https://www.suse.com/support/kb/doc/?id=000020510"
      },
      {
        "category": "external",
        "summary": "F5 Security Advisory K83120834 vom 2023-06-02",
        "url": "https://my.f5.com/manage/s/article/K83120834"
      },
      {
        "category": "external",
        "summary": "WatchGuard Security Advisory WGSA-2024-00008 vom 2024-04-22",
        "url": "https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2024-00008"
      }
    ],
    "source_lang": "en-US",
    "title": "TLS Implementierungen: Schwachstelle erm\u00f6glicht Denial of Service",
    "tracking": {
      "current_release_date": "2024-04-22T22:00:00.000+00:00",
      "generator": {
        "date": "2024-08-15T17:51:43.842+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.5"
        }
      },
      "id": "WID-SEC-W-2023-1352",
      "initial_release_date": "2021-12-13T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2021-12-13T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2023-06-04T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von F5 aufgenommen"
        },
        {
          "date": "2024-04-22T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von WatchGuard aufgenommen"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Apache HTTP Server",
            "product": {
              "name": "Apache HTTP Server",
              "product_id": "67869",
              "product_identification_helper": {
                "cpe": "cpe:/a:apache:http_server:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Apache"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "F5 BIG-IP",
            "product": {
              "name": "F5 BIG-IP",
              "product_id": "T001663",
              "product_identification_helper": {
                "cpe": "cpe:/a:f5:big-ip:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "F5"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "NGINX NGINX",
            "product": {
              "name": "NGINX NGINX",
              "product_id": "T014143",
              "product_identification_helper": {
                "cpe": "cpe:/a:nginx:nginx:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "NGINX"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Open Source OpenSSH",
            "product": {
              "name": "Open Source OpenSSH",
              "product_id": "8223",
              "product_identification_helper": {
                "cpe": "cpe:/a:openbsd:openssh:-"
              }
            }
          },
          {
            "category": "product_name",
            "name": "Open Source OpenSSL",
            "product": {
              "name": "Open Source OpenSSL",
              "product_id": "8269",
              "product_identification_helper": {
                "cpe": "cpe:/a:openssl:openssl:-"
              }
            }
          },
          {
            "category": "product_name",
            "name": "Open Source Postfix",
            "product": {
              "name": "Open Source Postfix",
              "product_id": "T004032",
              "product_identification_helper": {
                "cpe": "cpe:/a:postfix:postfix:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "SUSE Linux",
            "product": {
              "name": "SUSE Linux",
              "product_id": "T002207",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:suse_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Specification TLS",
            "product": {
              "name": "Specification TLS",
              "product_id": "T004212",
              "product_identification_helper": {
                "cpe": "cpe:/a:open_source:tls1:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Specification"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "WatchGuard Firebox",
            "product": {
              "name": "WatchGuard Firebox",
              "product_id": "T034346",
              "product_identification_helper": {
                "cpe": "cpe:/a:watchguard:firebox:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "WatchGuard"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2002-20001",
      "notes": [
        {
          "category": "description",
          "text": "Es existiert eine Schwachstelle in verschiedenen TLS Implementierungen, wenn ein Diffie-Hellman (DHE) Schl\u00fcsselaustausch aktiviert ist. Wird im DHE Handshake der \"Public key\" Parameter mit einem ung\u00fcltigen Wert bef\u00fcllt, verbraucht die Gegenstelle bei der Pr\u00fcfung viele CPU Ressourcen. Ein entfernter, anonymer Angreifer kann dies ausnutzen, um einen Denial of Service Zustand herbeizuf\u00fchren."
        }
      ],
      "product_status": {
        "known_affected": [
          "8223",
          "T004212",
          "T034346",
          "T002207",
          "8269",
          "67869",
          "T001663",
          "T004032",
          "T014143"
        ]
      },
      "release_date": "2021-12-13T23:00:00.000+00:00",
      "title": "CVE-2002-20001"
    }
  ]
}

CVE-2002-20001 (GCVE-0-2002-20001)

Vulnerability from cvelistv5 – Published: 2021-11-11 00:00 – Updated: 2025-02-13 16:27

Summary

The Diffie-Hellman Key Agreement Protocol allows remote attackers (from the client side) to send arbitrary numbers that are actually not public keys, and trigger expensive server-side DHE modular-exponentiation calculations, aka a D(HE)at or D(HE)ater attack. The client needs very little CPU resources and network bandwidth. The attack may be more disruptive in cases where a client can require a server to select its largest supported key size. The basic attack scenario is that the client must claim that it can only communicate with DHE, and the server must be configured to allow DHE.

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	https://github.com/Balasys/dheater
	https://www.researchgate.net/profile/Anton-Stigli…
	https://www.reddit.com/r/netsec/comments/qdoosy/s…
	https://github.com/mozilla/ssl-config-generator/i…
	https://cert-portal.siemens.com/productcert/pdf/s…
	https://www.suse.com/support/kb/doc/?id=000020510
	https://www.openssl.org/blog/blog/2022/10/21/tls-…
	https://www.arubanetworks.com/assets/alert/ARUBA-…
	https://support.f5.com/csp/article/K83120834
	https://dheatattack.com
	https://gitlab.com/dheatattack/dheater
	https://dheatattack.gitlab.io/
	https://ieeexplore.ieee.org/document/10374117

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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        "providerMetadata": {
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            "url": "https://www.reddit.com/r/netsec/comments/qdoosy/server_overload_by_enforcing_dhe_key_exchange/"
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            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-506569.pdf"
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            "url": "https://www.suse.com/support/kb/doc/?id=000020510"
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            "url": "https://www.openssl.org/blog/blog/2022/10/21/tls-groups-configuration/"
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            "url": "https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2022-004.txt"
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    "cna": {
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          "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-506569.pdf"
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        {
          "url": "https://www.suse.com/support/kb/doc/?id=000020510"
        },
        {
          "url": "https://www.openssl.org/blog/blog/2022/10/21/tls-groups-configuration/"
        },
        {
          "url": "https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2022-004.txt"
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        {
          "url": "https://support.f5.com/csp/article/K83120834"
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  "dataVersion": "5.1"
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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-2023-1352

CVE-2002-20001 (GCVE-0-2002-20001)

Tags

Sightings

Nomenclature