WID-SEC-W-2024-1058

Vulnerability from csaf_certbund - Published: 2013-01-28 23:00 - Updated: 2024-05-07 22:00
Summary
libssh: 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: libssh ist eine C Bibliothek für das Anbieten von SSH Diensten auf Client- und Serverseite. Sie kann genutzt werden, um aus der Ferne Programme auszuführen, Dateien zu übertragen oder als sicherer und transparenter Tunnel für entfernte Programme genutzt werden. Ubuntu Linux ist die Linux Distribution des Herstellers Canonical.
Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in der libssh Bibliothek ausnutzen, um einen Denial Of Service Angriff durchzuführen.
Betroffene Betriebssysteme: - Linux - Windows
CVE-2013-0176

In der libssh Bibliothek besteht eine Denial of Service Schwachstelle. Diese Schwachstelle wird durch eine NULL-Zeiger Dereferenzierung in der "publickey_from_privatekey()" Funktion in [src/server.c] verursacht, wenn speziell manipulierte Anfragen verarbeitet werden. Ein entfernter, anonymer Angreifer kann diese Schwachstelle ausnutzen, um einen Denial of Service Angriff durchzuführen.

Affected products
Product Identifier Version Remediation
Ubuntu Linux 11.10
Ubuntu / Linux
 cpe:/o:canonical:ubuntu_linux:11.10 11.1
Ubuntu Linux 12.04 LTS
Ubuntu / Linux
 cpe:/o:canonical:ubuntu_linux:12.04:-:lts 12.04 LTS
EMC Avamar
EMC
 cpe:/a:emc:avamar:- —
Ubuntu Linux 11.04 LTS
Ubuntu / Linux
 cpe:/o:canonical:ubuntu_linux:11.04:-:lts 11.04 LTS
Ubuntu Linux 12.10
Ubuntu / Linux
 cpe:/o:canonical:ubuntu_linux:12.10 12.1
Dell NetWorker virtual
Dell / NetWorker
 cpe:/a:dell:networker:virtual virtual
References
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": "libssh ist eine C Bibliothek f\u00fcr das Anbieten von SSH Diensten auf Client- und Serverseite. Sie kann genutzt werden, um aus der Ferne Programme auszuf\u00fchren, Dateien zu \u00fcbertragen oder als sicherer und transparenter Tunnel f\u00fcr entfernte Programme genutzt werden.\r\n\r\nUbuntu Linux ist die Linux Distribution des Herstellers Canonical.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in der libssh Bibliothek ausnutzen, um einen Denial Of Service Angriff durchzuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\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-2024-1058 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2013/wid-sec-w-2024-1058.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2024-1058 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2024-1058"
      },
      {
        "category": "external",
        "summary": "libssh 0.5.4 (SECURITY RELEASE) vom 2013-01-22",
        "url": "http://www.libssh.org/2013/01/22/libssh-0-5-4-security-release/"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-1707-1 vom 2013-01-28",
        "url": "http://www.ubuntu.com/usn/usn-1707-1/"
      },
      {
        "category": "external",
        "summary": "Dell Security Advisory DSA-2024-198 vom 2024-05-08",
        "url": "https://www.dell.com/support/kbdoc/000224827/dsa-2024-="
      }
    ],
    "source_lang": "en-US",
    "title": "libssh: Schwachstelle erm\u00f6glicht Denial Of Service",
    "tracking": {
      "current_release_date": "2024-05-07T22:00:00.000+00:00",
      "generator": {
        "date": "2024-08-15T18:08:39.258+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.5"
        }
      },
      "id": "WID-SEC-W-2024-1058",
      "initial_release_date": "2013-01-28T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2013-01-28T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initial Release"
        },
        {
          "date": "2013-01-28T23:00:00.000+00:00",
          "number": "2",
          "summary": "Version nicht vorhanden"
        },
        {
          "date": "2024-05-07T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Dell aufgenommen"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "virtual",
                "product": {
                  "name": "Dell NetWorker virtual",
                  "product_id": "T034583",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:dell:networker:virtual"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "NetWorker"
          }
        ],
        "category": "vendor",
        "name": "Dell"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "EMC Avamar",
            "product": {
              "name": "EMC Avamar",
              "product_id": "T014381",
              "product_identification_helper": {
                "cpe": "cpe:/a:emc:avamar:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "EMC"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c0.5.4",
                "product": {
                  "name": "Open Source libssh \u003c0.5.4",
                  "product_id": "T000398"
                }
              }
            ],
            "category": "product_name",
            "name": "libssh"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "11.1",
                "product": {
                  "name": "Ubuntu Linux 11.10",
                  "product_id": "155532",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:canonical:ubuntu_linux:11.10"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "12.04 LTS",
                "product": {
                  "name": "Ubuntu Linux 12.04 LTS",
                  "product_id": "170497",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:canonical:ubuntu_linux:12.04:-:lts"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "12.1",
                "product": {
                  "name": "Ubuntu Linux 12.10",
                  "product_id": "T000399",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:canonical:ubuntu_linux:12.10"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "11.04 LTS",
                "product": {
                  "name": "Ubuntu Linux 11.04 LTS",
                  "product_id": "T000400",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:canonical:ubuntu_linux:11.04:-:lts"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Linux"
          }
        ],
        "category": "vendor",
        "name": "Ubuntu"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2013-0176",
      "notes": [
        {
          "category": "description",
          "text": "In der libssh Bibliothek besteht eine Denial of Service Schwachstelle. Diese Schwachstelle wird durch eine NULL-Zeiger Dereferenzierung in der \"publickey_from_privatekey()\" Funktion in [src/server.c] verursacht, wenn speziell manipulierte Anfragen verarbeitet werden. Ein entfernter, anonymer Angreifer kann diese Schwachstelle ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren."
        }
      ],
      "product_status": {
        "known_affected": [
          "155532",
          "170497",
          "T014381",
          "T000400",
          "T000399",
          "T034583"
        ]
      },
      "release_date": "2013-01-28T23:00:00.000+00:00",
      "title": "CVE-2013-0176"
    }
  ]
}



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