csaf_certbund - wid-sec-w-2023-0978

wid-sec-w-2023-0978

Vulnerability from csaf_certbund

Published

2023-04-16 22:00

Modified

2024-03-27 23:00

Summary

shadow: Schwachstelle ermöglicht Darstellen falscher Informationen

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

Shadow stellt auf Unix/Linux Systemen einen Mechanismus bereit, um Passwörter von Benutzer als Hash zu speichern.

Angriff

Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in shadow ausnutzen, um falsche Informationen darzustellen.

Betroffene Betriebssysteme

- Linux - UNIX

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": "Shadow stellt auf Unix/Linux Systemen einen Mechanismus bereit, um Passw\u00f6rter von Benutzer als Hash zu speichern.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in shadow ausnutzen, um falsche Informationen darzustellen.",
        "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-2023-0978 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-0978.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2023-0978 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-0978"
      },
      {
        "category": "external",
        "summary": "GitHub Advisory Database vom 2023-04-16",
        "url": "https://github.com/advisories/GHSA-p9w4-8hh8-crcx"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:2066-1 vom 2023-04-29",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-April/014676.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:2069-1 vom 2023-04-28",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-April/014667.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:2068-1 vom 2023-04-28",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-April/014668.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:2067-1 vom 2023-04-28",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-April/014669.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:2066-1 vom 2023-04-28",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-April/014670.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:2070-1 vom 2023-04-28",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-April/014666.html"
      },
      {
        "category": "external",
        "summary": "Dell Security Advisory DSA-2023-317 vom 2023-11-13",
        "url": "https://www.dell.com/support/kbdoc/de-de/000219148/dsa-2023-317-security-update-for-dell-networker-vproxy-multiple-linux-packages-vulnerabilities"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2024:0939-1 vom 2024-03-22",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2024-March/018199.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2024:1007-1 vom 2024-03-27",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2024-March/018223.html"
      }
    ],
    "source_lang": "en-US",
    "title": "shadow: Schwachstelle erm\u00f6glicht Darstellen falscher Informationen",
    "tracking": {
      "current_release_date": "2024-03-27T23:00:00.000+00:00",
      "generator": {
        "date": "2024-08-15T17:48:59.699+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.5"
        }
      },
      "id": "WID-SEC-W-2023-0978",
      "initial_release_date": "2023-04-16T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2023-04-16T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2023-05-01T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2023-11-12T23:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Dell aufgenommen"
        },
        {
          "date": "2024-03-24T23:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2024-03-27T23:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von SUSE aufgenommen"
        }
      ],
      "status": "final",
      "version": "5"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c vproxy 19.9.0.2",
                "product": {
                  "name": "Dell NetWorker \u003c vproxy 19.9.0.2",
                  "product_id": "T030173"
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c vproxy 19.8.0.3",
                "product": {
                  "name": "Dell NetWorker \u003c vproxy 19.8.0.3",
                  "product_id": "T030174"
                }
              }
            ],
            "category": "product_name",
            "name": "NetWorker"
          }
        ],
        "category": "vendor",
        "name": "Dell"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "4.13",
                "product": {
                  "name": "Open Source shadow 4.13",
                  "product_id": "T027278",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:open_source:shadow:4.13"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "shadow"
          }
        ],
        "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"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-29383",
      "notes": [
        {
          "category": "description",
          "text": "Es existiert eine Schwachstelle in shadow. Es ist m\u00f6glich, Steuerzeichen in Felder einzuf\u00fcgen, die dem SUID-Programm chfn (change finger) zur Verf\u00fcgung gestellt werden. Dadurch kann die Datei /etc/passwd bei der Anzeige falsch dargestellt werden. Ein Angreifer kann diese Schwachstelle ausnutzen, um Informationen dalsch darzustellen."
        }
      ],
      "product_status": {
        "known_affected": [
          "T002207",
          "T027278",
          "T030174",
          "T030173"
        ]
      },
      "release_date": "2023-04-16T22:00:00.000+00:00",
      "title": "CVE-2023-29383"
    }
  ]
}

cve-2023-29383

Vulnerability from cvelistv5

Published

2023-04-14 00:00

Modified

2024-08-02 14:07

Severity ?

Summary

In Shadow 4.13, it is possible to inject control characters into fields provided to the SUID program chfn (change finger). Although it is not possible to exploit this directly (e.g., adding a new user fails because \n is in the block list), it is possible to misrepresent the /etc/passwd file when viewed. Use of \r manipulations and Unicode characters to work around blocking of the : character make it possible to give the impression that a new user has been added. In other words, an adversary may be able to convince a system administrator to take the system offline (an indirect, social-engineered denial of service) by demonstrating that "cat /etc/passwd" shows a rogue user account.

References

▼	URL	Tags
	https://github.com/shadow-maint/shadow/pull/687
	https://github.com/shadow-maint/shadow/commit/e5905c4b84d4fb90aefcd96ee618411ebfac663d
	https://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=31797
	https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/cve-2023-29383-abusing-linux-chfn-to-misrepresent-etc-passwd/

Impacted products

Vendor

Product

Version

▼

n/a

Version: n/a

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T14:07:45.784Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/shadow-maint/shadow/pull/687"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/shadow-maint/shadow/commit/e5905c4b84d4fb90aefcd96ee618411ebfac663d"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=31797"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/cve-2023-29383-abusing-linux-chfn-to-misrepresent-etc-passwd/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In Shadow 4.13, it is possible to inject control characters into fields provided to the SUID program chfn (change finger). Although it is not possible to exploit this directly (e.g., adding a new user fails because \\n is in the block list), it is possible to misrepresent the /etc/passwd file when viewed. Use of \\r manipulations and Unicode characters to work around blocking of the : character make it possible to give the impression that a new user has been added. In other words, an adversary may be able to convince a system administrator to take the system offline (an indirect, social-engineered denial of service) by demonstrating that \"cat /etc/passwd\" shows a rogue user account."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-04-14T00:00:00",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://github.com/shadow-maint/shadow/pull/687"
        },
        {
          "url": "https://github.com/shadow-maint/shadow/commit/e5905c4b84d4fb90aefcd96ee618411ebfac663d"
        },
        {
          "url": "https://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=31797"
        },
        {
          "url": "https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/cve-2023-29383-abusing-linux-chfn-to-misrepresent-etc-passwd/"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2023-29383",
    "datePublished": "2023-04-14T00:00:00",
    "dateReserved": "2023-04-05T00:00:00",
    "dateUpdated": "2024-08-02T14:07:45.784Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted