csaf_certbund - wid-sec-w-2023-0227

WID-SEC-W-2023-0227

Vulnerability from csaf_certbund - Published: 2023-01-30 23:00 - Updated: 2023-03-02 23:00

Summary

Linux Kernel: Schwachstelle ermöglicht Privilegieneskalation

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

Der Kernel stellt den Kern des Linux Betriebssystems dar.

Angriff

Ein lokaler Angreifer kann eine Schwachstelle im Linux Kernel ausnutzen, um seine Privilegien zu erhöhen.

Betroffene Betriebssysteme

- Linux

JSON

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{
  "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": "Der Kernel stellt den Kern des Linux Betriebssystems dar.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein lokaler Angreifer kann eine Schwachstelle im Linux Kernel ausnutzen, um seine Privilegien zu erh\u00f6hen.",
        "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-2023-0227 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-0227.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2023-0227 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-0227"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DLA-3349 vom 2023-03-02",
        "url": "https://lists.debian.org/debian-lts-announce/2023/03/msg00000.html"
      },
      {
        "category": "external",
        "summary": "Github Security Advisory GHSA-RR76-FJ9V-7W82 vom 2023-01-30",
        "url": "https://github.com/advisories/GHSA-rr76-fj9v-7w82"
      }
    ],
    "source_lang": "en-US",
    "title": "Linux Kernel: Schwachstelle erm\u00f6glicht Privilegieneskalation",
    "tracking": {
      "current_release_date": "2023-03-02T23:00:00.000+00:00",
      "generator": {
        "date": "2024-08-15T17:42:44.373+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.5"
        }
      },
      "id": "WID-SEC-W-2023-0227",
      "initial_release_date": "2023-01-30T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2023-01-30T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2023-03-02T23:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Debian aufgenommen"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "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": [
          {
            "category": "product_name",
            "name": "Open Source Linux Kernel \u003c 5.10.161",
            "product": {
              "name": "Open Source Linux Kernel \u003c 5.10.161",
              "product_id": "T026053",
              "product_identification_helper": {
                "cpe": "cpe:/o:linux:linux_kernel:5.10.161"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-0240",
      "notes": [
        {
          "category": "description",
          "text": "Es existiert eine Schwachstelle im Linux Kernel. Aufgrund eines Logik-Fehlers in der Implementierung von \"io_uring\" kommt es zu einem Use-after-Free-Zustand. Ein lokaler Angreifer kann diese Schwachstelle ausnutzen, um seine Privilegien zu erweitern."
        }
      ],
      "product_status": {
        "known_affected": [
          "2951"
        ]
      },
      "release_date": "2023-01-30T23:00:00.000+00:00",
      "title": "CVE-2023-0240"
    }
  ]
}

CVE-2023-0240 (GCVE-0-2023-0240)

Vulnerability from cvelistv5 – Published: 2023-01-30 13:17 – Updated: 2024-08-02 05:02

Summary

There is a logic error in io_uring's implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation. In the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161.

Severity ?

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416 - Use After Free

Assigner

Google

References

URL

Tags

	https://git.kernel.org/pub/scm/linux/kernel/git/s…
	https://github.com/gregkh/linux/commit/1e6fa5216a…
	https://kernel.dance/#788d0824269bef539fe31a785b1…

Impacted products

	Vendor	Product	Version
	Linux	Linux Kernel	Affected: 5.10 , ≤ 5.10.161 (custom)

Credits

Bing-Jhong Billy Jheng of Starlabs

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

WID-SEC-W-2023-0227

CVE-2023-0240 (GCVE-0-2023-0240)

Tags

Sightings

Nomenclature