Vulnerability-Lookup

ubuntu-cve-2021-4024

Vulnerability from osv_ubuntu

Published

2021-12-23 20:15

Modified

2026-03-25 16:49

Summary

Details

A flaw was found in podman. The podman machine function (used to create and manage Podman virtual machine containing a Podman process) spawns a gvproxy process on the host system. The gvproxy API is accessible on port 7777 on all IP addresses on the host. If that port is open on the host's firewall, an attacker can potentially use the gvproxy API to forward ports on the host to ports in the VM, making private services on the VM accessible to the network. This issue could be also used to interrupt the host's services by forwarding all ports to the VM.

Severity

6.5 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2021-4024	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2026675	REPORT
	https://twitter.com/discordianfish/status/1463462…	REPORT
	https://github.com/containers/podman/pull/12283	REPORT
	https://www.cve.org/CVERecord?id=CVE-2021-4024	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "podman",
            "binary_version": "3.4.4+ds1-1ubuntu1.22.04.3+esm3"
          },
          {
            "binary_name": "podman-docker",
            "binary_version": "3.4.4+ds1-1ubuntu1.22.04.3+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "libpod",
        "purl": "pkg:deb/ubuntu/libpod@3.4.4+ds1-1ubuntu1.22.04.3+esm3?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.2.1+ds1-2ubuntu3",
        "3.4.4+ds1-1ubuntu1",
        "3.4.4+ds1-1ubuntu1.22.04.1",
        "3.4.4+ds1-1ubuntu1.22.04.2",
        "3.4.4+ds1-1ubuntu1.22.04.3",
        "3.4.4+ds1-1ubuntu1.22.04.3+esm1",
        "3.4.4+ds1-1ubuntu1.22.04.3+esm2",
        "3.4.4+ds1-1ubuntu1.22.04.3+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "podman",
            "binary_version": "4.9.3+ds1-1ubuntu0.2+esm3"
          },
          {
            "binary_name": "podman-docker",
            "binary_version": "4.9.3+ds1-1ubuntu0.2+esm3"
          },
          {
            "binary_name": "podman-remote",
            "binary_version": "4.9.3+ds1-1ubuntu0.2+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "libpod",
        "purl": "pkg:deb/ubuntu/libpod@4.9.3+ds1-1ubuntu0.2+esm3?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.3.1+ds1-8",
        "4.7.2+ds1-2",
        "4.7.2+ds1-2build1",
        "4.8.3+ds1-2",
        "4.9.0+ds1-2",
        "4.9.3+ds1-1",
        "4.9.3+ds1-1build1",
        "4.9.3+ds1-1build2",
        "4.9.3+ds1-1ubuntu0.1",
        "4.9.3+ds1-1ubuntu0.2",
        "4.9.3+ds1-1ubuntu0.2+esm1",
        "4.9.3+ds1-1ubuntu0.2+esm2",
        "4.9.3+ds1-1ubuntu0.2+esm3"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in podman. The `podman machine` function (used to create and manage Podman virtual machine containing a Podman process) spawns a `gvproxy` process on the host system. The `gvproxy` API is accessible on port 7777 on all IP addresses on the host. If that port is open on the host\u0027s firewall, an attacker can potentially use the `gvproxy` API to forward ports on the host to ports in the VM, making private services on the VM accessible to the network. This issue could be also used to interrupt the host\u0027s services by forwarding all ports to the VM.",
  "id": "UBUNTU-CVE-2021-4024",
  "modified": "2026-03-25T16:49:49Z",
  "published": "2021-12-23T20:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-4024"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2026675"
    },
    {
      "type": "REPORT",
      "url": "https://twitter.com/discordianfish/status/1463462371675066371"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/containers/podman/pull/12283"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-4024"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-4024"
  ]
}

CVE-2021-4024 (GCVE-0-2021-4024)

Vulnerability from cvelistv5 – Published: 2021-12-23 19:48 – Updated: 2024-08-03 17:16

Summary

A flaw was found in podman. The `podman machine` function (used to create and manage Podman virtual machine containing a Podman process) spawns a `gvproxy` process on the host system. The `gvproxy` API is accessible on port 7777 on all IP addresses on the host. If that port is open on the host's firewall, an attacker can potentially use the `gvproxy` API to forward ports on the host to ports in the VM, making private services on the VM accessible to the network. This issue could be also used to interrupt the host's services by forwarding all ports to the VM.

Severity

No CVSS data available.

CWE

CWE-200 - CWE-346

Assigner

redhat redhat root

References

3 references

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2026675%2C	x_refsource_MISC
https://github.com/containers/podman/releases/tag…	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA

Impacted products

1 product

Vendor	Product	Version
n/a	podman	Affected: podman 3.4.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T17:16:03.464Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2026675%2C"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/containers/podman/releases/tag/v3.4.3"
          },
          {
            "name": "FEDORA-2021-6bd024d2a7",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QFFVJ6S3ZRMPDYB7KYAWEMDHXFZYQPU3/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "podman",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "podman 3.4.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A flaw was found in podman. The `podman machine` function (used to create and manage Podman virtual machine containing a Podman process) spawns a `gvproxy` process on the host system. The `gvproxy` API is accessible on port 7777 on all IP addresses on the host. If that port is open on the host\u0027s firewall, an attacker can potentially use the `gvproxy` API to forward ports on the host to ports in the VM, making private services on the VM accessible to the network. This issue could be also used to interrupt the host\u0027s services by forwarding all ports to the VM."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-200",
              "description": "CWE-200, CWE-346",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-02-08T02:06:09.000Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2026675%2C"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/containers/podman/releases/tag/v3.4.3"
        },
        {
          "name": "FEDORA-2021-6bd024d2a7",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QFFVJ6S3ZRMPDYB7KYAWEMDHXFZYQPU3/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "secalert@redhat.com",
          "ID": "CVE-2021-4024",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "podman",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "podman 3.4.3"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A flaw was found in podman. The `podman machine` function (used to create and manage Podman virtual machine containing a Podman process) spawns a `gvproxy` process on the host system. The `gvproxy` API is accessible on port 7777 on all IP addresses on the host. If that port is open on the host\u0027s firewall, an attacker can potentially use the `gvproxy` API to forward ports on the host to ports in the VM, making private services on the VM accessible to the network. This issue could be also used to interrupt the host\u0027s services by forwarding all ports to the VM."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-200, CWE-346"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://bugzilla.redhat.com/show_bug.cgi?id=2026675,",
              "refsource": "MISC",
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2026675,"
            },
            {
              "name": "https://github.com/containers/podman/releases/tag/v3.4.3",
              "refsource": "MISC",
              "url": "https://github.com/containers/podman/releases/tag/v3.4.3"
            },
            {
              "name": "FEDORA-2021-6bd024d2a7",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QFFVJ6S3ZRMPDYB7KYAWEMDHXFZYQPU3/"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2021-4024",
    "datePublished": "2021-12-23T19:48:45.000Z",
    "dateReserved": "2021-11-26T00:00:00.000Z",
    "dateUpdated": "2024-08-03T17:16:03.464Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.