WID-SEC-W-2024-0762

Vulnerability from csaf_certbund - Published: 2024-04-01 22:00 - Updated: 2024-04-01 22:00
Summary
xz: Schwachstelle ermöglicht Ausführen von beliebigem Programmcode
Severity
Kritisch
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: XZ Utils bietet eine universelle Datenkompressionsbibliothek sowie Befehlszeilenwerkzeuge.
Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Debian Linux, SUSE Linux, Arch Linux, Fedora Linux, xz und Gentoo Linux ausnutzen, um beliebigen Programmcode auszuführen.
Betroffene Betriebssysteme: - Linux
CVE-2024-3094

Es gibt eine Schwachstelle in xz aufgrund von eingebettetem bösartigen Code, der eine Hintertür bildet. Diese Bibliothek wird unter anderem im OpenSSH-Server verwendet. Der Backdoor-Code erlaubt es bestimmten entfernten Angreifern (die einen bestimmten privaten Schlüssel besitzen), beliebigen Payload über SSH zu senden, der auf dem Server vor dem Authentifizierungsschritt ausgeführt wird. Ein entfernter, anonymer Angreifer kann diese Schwachstelle ausnutzen, um beliebigen Programmcode mit den Rechten des SSH-Dienstes auszuführen und so das System zu kompromittieren.

Affected products
Product Identifier Version Remediation
Open Source OpenSSH
Open Source
 cpe:/a:openbsd:openssh:- —
Gentoo Linux
Gentoo
 cpe:/o:gentoo:linux:- —
Open Source xz 5.6.0
Open Source / xz
 cpe:/a:tukaani:xz:5.6.0 5.6.0
Open Source xz 5.6.1
Open Source / xz
 cpe:/a:tukaani:xz:5.6.1 5.6.1
Debian Linux unstable
Debian / Linux
 cpe:/o:debian:debian_linux:unstable unstable
Open Source Arch Linux
Open Source
 cpe:/o:archlinux:archlinux:- —
SUSE Linux Tumbleweed
SUSE / Linux
 cpe:/o:suse:suse_linux:tumbleweed Tumbleweed
SUSE Linux MicroOS
SUSE / Linux
 cpe:/o:suse:suse_linux:microos MicroOS
Fedora Linux
Fedora
 cpe:/o:fedoraproject:fedora:- —
References
To clipboard 

{
  "document": {
    "aggregate_severity": {
      "text": "kritisch"
    },
    "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": "XZ Utils bietet eine universelle Datenkompressionsbibliothek sowie Befehlszeilenwerkzeuge.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Debian Linux, SUSE Linux, Arch Linux, Fedora Linux, xz und Gentoo Linux ausnutzen, um beliebigen Programmcode auszuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux",
        "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-2024-0762 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2024/wid-sec-w-2024-0762.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2024-0762 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2024-0762"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Alert vom 2024-04-01",
        "url": "https://www.redhat.com/en/blog/urgent-security-alert-fedora-41-and-rawhide-users"
      },
      {
        "category": "external",
        "summary": "GitHub Advisory Database",
        "url": "https://github.com/advisories/GHSA-rxwq-x6h5-x525"
      },
      {
        "category": "external",
        "summary": "Red Hat Bugzilla \u2013 Bug 2272210",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2272210"
      },
      {
        "category": "external",
        "summary": "CISA Report",
        "url": "https://www.cisa.gov/news-events/alerts/2024/03/29/reported-supply-chain-compromise-affecting-xz-utils-data-compression-library-cve-2024-3094"
      },
      {
        "category": "external",
        "summary": "Statement des Autors von xz",
        "url": "https://tukaani.org/xz-backdoor/"
      },
      {
        "category": "external",
        "summary": "Proof of Concept (PoC)",
        "url": "https://github.com/amlweems/xzbot"
      }
    ],
    "source_lang": "en-US",
    "title": "xz: Schwachstelle erm\u00f6glicht Ausf\u00fchren von beliebigem Programmcode",
    "tracking": {
      "current_release_date": "2024-04-01T22:00:00.000+00:00",
      "generator": {
        "date": "2024-08-15T18:07:05.845+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.5"
        }
      },
      "id": "WID-SEC-W-2024-0762",
      "initial_release_date": "2024-04-01T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2024-04-01T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "unstable",
                "product": {
                  "name": "Debian Linux unstable",
                  "product_id": "T033830",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:debian:debian_linux:unstable"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Linux"
          }
        ],
        "category": "vendor",
        "name": "Debian"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Fedora Linux",
            "product": {
              "name": "Fedora Linux",
              "product_id": "T033781",
              "product_identification_helper": {
                "cpe": "cpe:/o:fedoraproject:fedora:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Fedora"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Gentoo Linux",
            "product": {
              "name": "Gentoo Linux",
              "product_id": "T033788",
              "product_identification_helper": {
                "cpe": "cpe:/o:gentoo:linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Gentoo"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Open Source Arch Linux",
            "product": {
              "name": "Open Source Arch Linux",
              "product_id": "T033780",
              "product_identification_helper": {
                "cpe": "cpe:/o:archlinux:archlinux:-"
              }
            }
          },
          {
            "category": "product_name",
            "name": "Open Source OpenSSH",
            "product": {
              "name": "Open Source OpenSSH",
              "product_id": "8223",
              "product_identification_helper": {
                "cpe": "cpe:/a:openbsd:openssh:-"
              }
            }
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "5.6.0",
                "product": {
                  "name": "Open Source xz 5.6.0",
                  "product_id": "T033785",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:tukaani:xz:5.6.0"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "5.6.1",
                "product": {
                  "name": "Open Source xz 5.6.1",
                  "product_id": "T033786",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:tukaani:xz:5.6.1"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "xz"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "Tumbleweed",
                "product": {
                  "name": "SUSE Linux Tumbleweed",
                  "product_id": "T033783",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:suse:suse_linux:tumbleweed"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "MicroOS",
                "product": {
                  "name": "SUSE Linux MicroOS",
                  "product_id": "T033784",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:suse:suse_linux:microos"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Linux"
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2024-3094",
      "notes": [
        {
          "category": "description",
          "text": "Es gibt eine Schwachstelle in xz aufgrund von eingebettetem b\u00f6sartigen Code, der eine Hintert\u00fcr bildet. Diese Bibliothek wird unter anderem im OpenSSH-Server verwendet. Der Backdoor-Code erlaubt es bestimmten entfernten Angreifern (die einen bestimmten privaten Schl\u00fcssel besitzen), beliebigen Payload \u00fcber SSH zu senden, der auf dem Server vor dem Authentifizierungsschritt ausgef\u00fchrt wird. Ein entfernter, anonymer Angreifer kann diese Schwachstelle ausnutzen, um beliebigen Programmcode mit den Rechten des SSH-Dienstes auszuf\u00fchren und so das System zu kompromittieren."
        }
      ],
      "product_status": {
        "known_affected": [
          "8223",
          "T033788",
          "T033785",
          "T033786",
          "T033830",
          "T033780",
          "T033783",
          "T033784",
          "T033781"
        ]
      },
      "release_date": "2024-04-01T22:00:00.000+00:00",
      "title": "CVE-2024-3094"
    }
  ]
}



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