WID-SEC-W-2024-0438

Vulnerability from csaf_certbund - Published: 2020-07-29 22:00 - 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.
Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in libssh ausnutzen, um einen Denial of Service Angriff durchzuführen.
Betroffene Betriebssysteme: - Linux - UNIX
CVE-2020-16135

Es existiert eine Schwachstelle in libssh. Diese beruht auf einer Null-Zeiger Dereferenzierung in tftpserver.c if ssh_buffer_new. Ein entfernter anonymer Angreifer kann diese Schwachstelle ausnutzen, um einen Denial of Service zu verursachen.

Affected products
Product Identifier Version Remediation
EMC Avamar
EMC
 cpe:/a:emc:avamar:- —
Debian Linux
Debian
 cpe:/o:debian:debian_linux:- —
SUSE Linux
SUSE
 cpe:/o:suse:suse_linux:- —
Red Hat Enterprise Linux
Red Hat
 cpe:/o:redhat:enterprise_linux:- —
Ubuntu Linux
Ubuntu
 cpe:/o:canonical:ubuntu_linux:- —
Dell NetWorker virtual
Dell / NetWorker
 cpe:/a:dell:networker:virtual virtual
Gentoo Linux
Gentoo
 cpe:/o:gentoo:linux:- —
Open Source libssh 0.9.4
Open Source / libssh
 cpe:/a:libssh:libssh:0.9.4 0.9.4
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.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in libssh 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-2024-0438 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2020/wid-sec-w-2024-0438.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2024-0438 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2024-0438"
      },
      {
        "category": "external",
        "summary": "NIST Database vom 2020-07-29",
        "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-16135"
      },
      {
        "category": "external",
        "summary": "Libssh bugs",
        "url": "https://bugs.libssh.org/rLIBSSHe631ebb3e2247dd25e9678e6827c20dc73b73238"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DLA-2303 vom 2020-08-01",
        "url": "https://lists.debian.org/debian-lts-announce/2020/debian-lts-announce-202007/msg00034.html"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-4447-1 vom 2020-08-04",
        "url": "https://usn.ubuntu.com/4447-1/"
      },
      {
        "category": "external",
        "summary": "Gentoo Linux Security Advisory GLSA-202011-05 vom 2020-11-03",
        "url": "https://security.gentoo.org/glsa/202011-05"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2021:4387 vom 2021-11-09",
        "url": "https://access.redhat.com/errata/RHSA-2021:4387"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2021:4750 vom 2021-11-19",
        "url": "https://access.redhat.com/errata/RHSA-2021:4750"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2021:4848 vom 2021-11-29",
        "url": "https://access.redhat.com/errata/RHSA-2021:4848"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2021:4845 vom 2021-11-29",
        "url": "https://access.redhat.com/errata/RHSA-2021:4845"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2022:0318 vom 2022-01-27",
        "url": "https://access.redhat.com/errata/RHSA-2022:0318"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2022:0434 vom 2022-02-04",
        "url": "https://access.redhat.com/errata/RHSA-2022:0434"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2024:0539-1 vom 2024-02-20",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2024-February/017974.html"
      },
      {
        "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": "2024-08-15T18:05:30.323+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.5"
        }
      },
      "id": "WID-SEC-W-2024-0438",
      "initial_release_date": "2020-07-29T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2020-07-29T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2020-08-02T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Debian aufgenommen"
        },
        {
          "date": "2020-08-04T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2020-09-10T22:00:00.000+00:00",
          "number": "4",
          "summary": "Referenz(en) aufgenommen: FEDORA-2020-F4F5E49CB8"
        },
        {
          "date": "2020-09-13T22:00:00.000+00:00",
          "number": "5",
          "summary": "Referenz(en) aufgenommen: FEDORA-2020-AC3E29073F"
        },
        {
          "date": "2020-11-02T23:00:00.000+00:00",
          "number": "6",
          "summary": "Neue Updates von Gentoo aufgenommen"
        },
        {
          "date": "2021-11-09T23:00:00.000+00:00",
          "number": "7",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2021-11-21T23:00:00.000+00:00",
          "number": "8",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2021-11-29T23:00:00.000+00:00",
          "number": "9",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2022-01-27T23:00:00.000+00:00",
          "number": "10",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2022-02-03T23:00:00.000+00:00",
          "number": "11",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2024-02-20T23:00:00.000+00:00",
          "number": "12",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2024-05-07T22:00:00.000+00:00",
          "number": "13",
          "summary": "Neue Updates von Dell aufgenommen"
        }
      ],
      "status": "final",
      "version": "13"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Debian Linux",
            "product": {
              "name": "Debian Linux",
              "product_id": "2951",
              "product_identification_helper": {
                "cpe": "cpe:/o:debian:debian_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Debian"
      },
      {
        "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": [
          {
            "category": "product_name",
            "name": "Gentoo Linux",
            "product": {
              "name": "Gentoo Linux",
              "product_id": "T012167",
              "product_identification_helper": {
                "cpe": "cpe:/o:gentoo:linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Gentoo"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "0.9.4",
                "product": {
                  "name": "Open Source libssh 0.9.4",
                  "product_id": "729746",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:libssh:libssh:0.9.4"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "libssh"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Red Hat Enterprise Linux",
            "product": {
              "name": "Red Hat Enterprise Linux",
              "product_id": "67646",
              "product_identification_helper": {
                "cpe": "cpe:/o:redhat:enterprise_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      },
      {
        "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": "Ubuntu Linux",
            "product": {
              "name": "Ubuntu Linux",
              "product_id": "T000126",
              "product_identification_helper": {
                "cpe": "cpe:/o:canonical:ubuntu_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Ubuntu"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-16135",
      "notes": [
        {
          "category": "description",
          "text": "Es existiert eine Schwachstelle in libssh. Diese beruht auf einer Null-Zeiger Dereferenzierung in tftpserver.c if ssh_buffer_new. Ein entfernter anonymer Angreifer kann diese Schwachstelle ausnutzen, um einen Denial of Service zu verursachen."
        }
      ],
      "product_status": {
        "known_affected": [
          "T014381",
          "2951",
          "T002207",
          "67646",
          "T000126",
          "T034583",
          "T012167",
          "729746"
        ]
      },
      "release_date": "2020-07-29T22:00:00.000+00:00",
      "title": "CVE-2020-16135"
    }
  ]
}



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