WID-SEC-W-2022-0795

Vulnerability from csaf_certbund - Published: 2022-05-10 22:00 - Updated: 2024-06-30 22:00
Summary
zsh: Schwachstelle ermöglicht Codeausführung
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: Die z-shell (zsh) ist eine Unix-Shell bzw. Benutzerschnittstelle unter Unix, worüber ein Benutzer in einer Eingabezeile Kommandos eingeben kann.
Angriff: Ein lokaler Angreifer kann eine Schwachstelle in zsh ausnutzen, um beliebigen Programmcode auszuführen.
Betroffene Betriebssysteme: - Linux - MacOS X - UNIX
CVE-2021-45444

In zsh besteht eine Schwachstelle, wenn "PROMPT_SUBST evaluation" aktiviert ist. Einige Prompt-Expansionssequenzen, wie z.B. "%F", unterstützen Argumente, die selbst expandiert werden. Dies kann ausgenutzt werden, um Code auszuführen, den der Benutzer nicht erwartet hat. Eine erfolgreiche Ausnutzung erfordert eine Benutzerinteraktion.

Affected products
Product Identifier Version Remediation
Red Hat Enterprise Linux
Red Hat
 cpe:/o:redhat:enterprise_linux:- —
Debian Linux
Debian
 cpe:/o:debian:debian_linux:- —
SUSE Linux
SUSE
 cpe:/o:suse:suse_linux:- —
Ubuntu Linux
Ubuntu
 cpe:/o:canonical:ubuntu_linux:- —
Amazon Linux 2
Amazon
 cpe:/o:amazon:linux_2:- —
Gentoo Linux
Gentoo
 cpe:/o:gentoo:linux:- —
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": "Die z-shell (zsh) ist eine Unix-Shell bzw. Benutzerschnittstelle unter Unix, wor\u00fcber ein Benutzer in einer Eingabezeile Kommandos eingeben kann.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein lokaler Angreifer kann eine Schwachstelle in zsh ausnutzen, um beliebigen Programmcode auszuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- MacOS X\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-2022-0795 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2022/wid-sec-w-2022-0795.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2022-0795 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2022-0795"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory vom 2022-05-10",
        "url": "https://access.redhat.com/errata/RHSA-2022:2120"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DSA-5078",
        "url": "https://www.debian.org/security/2022/dsa-5078"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DLA 2926",
        "url": "https://lists.debian.org/debian-lts-announce/2022/02/msg00020.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-March/010367.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-March/010368.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-March/010365.html"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-5325-1",
        "url": "https://ubuntu.com/security/notices/USN-5325-1"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS-2022-117 vom 2022-07-21",
        "url": "https://alas.aws.amazon.com/AL2022/ALAS-2022-117.html"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS-2022-180 vom 2022-11-04",
        "url": "https://alas.aws.amazon.com/AL2022/ALAS-2022-180.html"
      },
      {
        "category": "external",
        "summary": "Gentoo Linux Security Advisory GLSA-202407-01 vom 2024-07-01",
        "url": "https://security.gentoo.org/glsa/202407-01"
      }
    ],
    "source_lang": "en-US",
    "title": "zsh: Schwachstelle erm\u00f6glicht Codeausf\u00fchrung",
    "tracking": {
      "current_release_date": "2024-06-30T22:00:00.000+00:00",
      "generator": {
        "date": "2024-08-15T17:32:14.062+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.5"
        }
      },
      "id": "WID-SEC-W-2022-0795",
      "initial_release_date": "2022-05-10T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2022-05-10T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2022-07-21T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Amazon aufgenommen"
        },
        {
          "date": "2022-11-06T23:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Amazon aufgenommen"
        },
        {
          "date": "2024-06-30T22:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von Gentoo aufgenommen"
        }
      ],
      "status": "final",
      "version": "4"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Amazon Linux 2",
            "product": {
              "name": "Amazon Linux 2",
              "product_id": "398363",
              "product_identification_helper": {
                "cpe": "cpe:/o:amazon:linux_2:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Amazon"
      },
      {
        "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": [
          {
            "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_range",
                "name": "\u003c5.8.1",
                "product": {
                  "name": "Open Source zsh \u003c5.8.1",
                  "product_id": "1135488"
                }
              }
            ],
            "category": "product_name",
            "name": "zsh"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Red Hat Enterprise Linux",
            "product": {
              "name": "Red Hat Enterprise Linux",
              "product_id": "T015361",
              "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-2021-45444",
      "notes": [
        {
          "category": "description",
          "text": "In zsh besteht eine Schwachstelle, wenn \"PROMPT_SUBST evaluation\" aktiviert ist. Einige Prompt-Expansionssequenzen, wie z.B. \"%F\", unterst\u00fctzen Argumente, die selbst expandiert werden. Dies kann ausgenutzt werden, um Code auszuf\u00fchren, den der Benutzer nicht erwartet hat. Eine erfolgreiche Ausnutzung erfordert eine Benutzerinteraktion."
        }
      ],
      "product_status": {
        "known_affected": [
          "T015361",
          "2951",
          "T002207",
          "T000126",
          "398363",
          "T012167"
        ]
      },
      "release_date": "2022-05-10T22:00:00.000+00:00",
      "title": "CVE-2021-45444"
    }
  ]
}



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