Vulnerability-Lookup

CVE-2021-3748 (GCVE-0-2021-3748)

Vulnerability from cvelistv5 – Published: 2022-03-23 19:46 – Updated: 2024-08-03 17:09

Summary

A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.

Severity

No CVSS data available.

CWE

CWE-416 - - Use After Free

Assigner

redhat

References

8 references

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1998514	x_refsource_MISC
https://ubuntu.com/security/CVE-2021-3748	x_refsource_MISC
https://github.com/qemu/qemu/commit/bedd7e93d0196…	x_refsource_MISC
https://lists.nongnu.org/archive/html/qemu-devel/…	x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2022…	mailing-listx_refsource_MLIST
https://security.netapp.com/advisory/ntap-2022042…	x_refsource_CONFIRM
https://security.gentoo.org/glsa/202208-27	vendor-advisoryx_refsource_GENTOO
https://lists.debian.org/debian-lts-announce/2022…	mailing-listx_refsource_MLIST

Impacted products

1 product

Vendor	Product	Version
n/a	QEMU (virtio-net)	Affected: Affects qemu v0.10.0 and above, Fixed In – v6.2.0-rc0 and above.

Show details on NVD website

JSON

To clipboard

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}

WID-SEC-W-2022-0096

Vulnerability from csaf_certbund - Published: 2021-11-02 23:00 - Updated: 2023-01-10 23:00

Summary

Red Hat Enterprise Linux: Schwachstelle ermöglicht Ausführen von beliebigem Programmcode mit den Rechten des Dienstes

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: Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution.

Angriff: Ein lokaler Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux ausnutzen, um beliebigen Programmcode mit den Rechten des Dienstes auszuführen oder einen Denial of Service Zustand herbeizuführen.

Betroffene Betriebssysteme: - Linux

CVE-2021-3748

Es existiert eine Schwachstelle in Red Hat Enterprise Linux. Die Schwachstelle besteht in der Funktion "virtio-net device" der QEMU-Komponente und ist auf einen Use-after-Free-Fehler zurückzuführen. Ein lokaler Angreifer kann diese Schwachstelle ausnutzen, um beliebigen Programmcode mit Rechten des Dienstes auszuführen oder einen Denial of Service Zustand herbeizuführen.

Affected products

Known affected 6 products

Product	Identifier	Version
Debian Linux Debian	`cpe:/o:debian:debian_linux:-`	—
SUSE Linux SUSE	`cpe:/o:suse:suse_linux:-`	—
Ubuntu Linux Ubuntu	`cpe:/o:canonical:ubuntu_linux:-`	—
Gentoo Linux Gentoo	`cpe:/o:gentoo:linux:-`	—
Oracle Linux Oracle	`cpe:/o:oracle:linux:-`	—
Red Hat Enterprise Linux 8 Red Hat	`cpe:/o:redhat:enterprise_linux:8`	—

References

27 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://linux.oracle.com/errata/ELSA-2023-12014.html	external
https://linux.oracle.com/errata/ELSA-2023-12011.html	external
https://linux.oracle.com/errata/ELSA-2023-12013.html	external
https://linux.oracle.com/errata/ELSA-2023-12012.html	external
https://linux.oracle.com/errata/ELSA-2022-10036.html	external
https://linux.oracle.com/errata/ELSA-2022-10033.html	external
https://lists.suse.com/pipermail/sle-security-upd…	external
https://lists.suse.com/pipermail/sle-security-upd…	external
https://access.redhat.com/errata/RHSA-2021:4112	external
https://lists.suse.com/pipermail/sle-security-upd…	external
https://access.redhat.com/errata/RHSA-2021:5036	external
https://linux.oracle.com/errata/ELSA-2022-9460.html	external
https://ubuntu.com/security/notices/USN-5307-1	external
https://lists.debian.org/debian-lts-announce/2022…	external
https://linux.oracle.com/errata/ELSA-2022-9492.html	external
https://linux.oracle.com/errata/ELSA-2022-9491.html	external
https://linux.oracle.com/errata/ELSA-2022-9494.html	external
https://linux.oracle.com/errata/ELSA-2022-9493.html	external
https://access.redhat.com/errata/RHSA-2022:1759	external
https://security.gentoo.org/glsa/202208-27	external
https://lists.debian.org/debian-lts-announce/2022…	external
https://linux.oracle.com/errata/ELSA-2022-9772.html	external
https://linux.oracle.com/errata/ELSA-2022-9856.html	external
https://linux.oracle.com/errata/ELSA-2022-9854.html	external
https://linux.oracle.com/errata/ELSA-2022-9853.html	external

JSON

To clipboard

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      {
        "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": "Red Hat Enterprise Linux (RHEL) ist eine popul\u00e4re Linux-Distribution.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein lokaler Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux ausnutzen, um beliebigen Programmcode mit den Rechten des Dienstes auszuf\u00fchren oder einen Denial of Service Zustand herbeizuf\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-2022-0096 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2021/wid-sec-w-2022-0096.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2022-0096 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2022-0096"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2023-12014 vom 2023-01-11",
        "url": "https://linux.oracle.com/errata/ELSA-2023-12014.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2023-12011 vom 2023-01-11",
        "url": "https://linux.oracle.com/errata/ELSA-2023-12011.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2023-12013 vom 2023-01-11",
        "url": "https://linux.oracle.com/errata/ELSA-2023-12013.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2023-12012 vom 2023-01-11",
        "url": "https://linux.oracle.com/errata/ELSA-2023-12012.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-10036 vom 2022-11-29",
        "url": "https://linux.oracle.com/errata/ELSA-2022-10036.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-10033 vom 2022-11-30",
        "url": "https://linux.oracle.com/errata/ELSA-2022-10033.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2021:3613-1 vom 2021-11-04",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2021-November/009698.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2021:3614-1 vom 2021-11-04",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2021-November/009697.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2021:4112 vom 2021-11-02",
        "url": "https://access.redhat.com/errata/RHSA-2021:4112"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2021:3653-1 vom 2021-11-10",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2021-November/009717.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2021:5036 vom 2021-12-09",
        "url": "https://access.redhat.com/errata/RHSA-2021:5036"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-9460 vom 2022-06-06",
        "url": "https://linux.oracle.com/errata/ELSA-2022-9460.html"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-5307-1 vom 2022-02-28",
        "url": "https://ubuntu.com/security/notices/USN-5307-1"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DLA-2970 vom 2022-04-04",
        "url": "https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-9492 vom 2022-06-16",
        "url": "https://linux.oracle.com/errata/ELSA-2022-9492.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-9491 vom 2022-06-16",
        "url": "https://linux.oracle.com/errata/ELSA-2022-9491.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-9494 vom 2022-06-17",
        "url": "https://linux.oracle.com/errata/ELSA-2022-9494.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-9493 vom 2022-06-16",
        "url": "https://linux.oracle.com/errata/ELSA-2022-9493.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2022:1759 vom 2022-05-10",
        "url": "https://access.redhat.com/errata/RHSA-2022:1759"
      },
      {
        "category": "external",
        "summary": "Gentoo Linux Security Advisory GLSA-202208-27 vom 2022-08-23",
        "url": "https://security.gentoo.org/glsa/202208-27"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DLA-3099 vom 2022-09-05",
        "url": "https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-9772 vom 2022-09-08",
        "url": "https://linux.oracle.com/errata/ELSA-2022-9772.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-9856 vom 2022-10-03",
        "url": "https://linux.oracle.com/errata/ELSA-2022-9856.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-9854 vom 2022-10-05",
        "url": "https://linux.oracle.com/errata/ELSA-2022-9854.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-9853 vom 2022-10-06",
        "url": "https://linux.oracle.com/errata/ELSA-2022-9853.html"
      }
    ],
    "source_lang": "en-US",
    "title": "Red Hat Enterprise Linux: Schwachstelle erm\u00f6glicht Ausf\u00fchren von beliebigem Programmcode mit den Rechten des Dienstes",
    "tracking": {
      "current_release_date": "2023-01-10T23:00:00.000+00:00",
      "generator": {
        "date": "2024-08-15T17:26:29.489+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.5"
        }
      },
      "id": "WID-SEC-W-2022-0096",
      "initial_release_date": "2021-11-02T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2021-11-02T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2021-11-04T23:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2021-11-10T23:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2021-12-09T23:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2022-02-28T23:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2022-04-04T22:00:00.000+00:00",
          "number": "6",
          "summary": "Neue Updates von Debian aufgenommen"
        },
        {
          "date": "2022-05-10T22:00:00.000+00:00",
          "number": "7",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2022-06-06T22:00:00.000+00:00",
          "number": "8",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        },
        {
          "date": "2022-06-19T22:00:00.000+00:00",
          "number": "9",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        },
        {
          "date": "2022-08-22T22:00:00.000+00:00",
          "number": "10",
          "summary": "Neue Updates von Gentoo aufgenommen"
        },
        {
          "date": "2022-09-04T22:00:00.000+00:00",
          "number": "11",
          "summary": "Neue Updates von Debian aufgenommen"
        },
        {
          "date": "2022-09-08T22:00:00.000+00:00",
          "number": "12",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        },
        {
          "date": "2022-10-03T22:00:00.000+00:00",
          "number": "13",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        },
        {
          "date": "2022-10-05T22:00:00.000+00:00",
          "number": "14",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        },
        {
          "date": "2022-11-29T23:00:00.000+00:00",
          "number": "15",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        },
        {
          "date": "2023-01-10T23:00:00.000+00:00",
          "number": "16",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        }
      ],
      "status": "final",
      "version": "16"
    }
  },
  "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": "Gentoo Linux",
            "product": {
              "name": "Gentoo Linux",
              "product_id": "T012167",
              "product_identification_helper": {
                "cpe": "cpe:/o:gentoo:linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Gentoo"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Oracle Linux",
            "product": {
              "name": "Oracle Linux",
              "product_id": "T004914",
              "product_identification_helper": {
                "cpe": "cpe:/o:oracle:linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Oracle"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Red Hat Enterprise Linux 8",
            "product": {
              "name": "Red Hat Enterprise Linux 8",
              "product_id": "T014111",
              "product_identification_helper": {
                "cpe": "cpe:/o:redhat:enterprise_linux:8"
              }
            }
          }
        ],
        "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-2021-3748",
      "notes": [
        {
          "category": "description",
          "text": "Es existiert eine Schwachstelle in Red Hat Enterprise Linux. Die Schwachstelle besteht in der Funktion \"virtio-net device\" der QEMU-Komponente und ist auf einen Use-after-Free-Fehler zur\u00fcckzuf\u00fchren. Ein lokaler Angreifer kann diese Schwachstelle ausnutzen, um beliebigen Programmcode mit Rechten des Dienstes auszuf\u00fchren oder einen Denial of Service Zustand herbeizuf\u00fchren."
        }
      ],
      "product_status": {
        "known_affected": [
          "2951",
          "T002207",
          "T000126",
          "T012167",
          "T004914",
          "T014111"
        ]
      },
      "release_date": "2021-11-02T23:00:00.000+00:00",
      "title": "CVE-2021-3748"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

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

CVE-2021-3748 (GCVE-0-2021-3748)

WID-SEC-W-2022-0096

Tags

Sightings

Nomenclature