Vulnerability-Lookup

Vulnerability from cleanstart

Published

2026-07-30 07:10

Modified

2026-07-30 09:40

Summary

Security fixes in runc 1.0.0_rc95-r0

Details

Package runc version 1.0.0_rc95-r0 fixes 1 vulnerabilities: CVE-2021-30465

References

URL

Type

https://www.opencontainers.org

WEB

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Alpine",
        "name": "runc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.0_rc95-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0_rc95-r0"
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "Package runc version 1.0.0_rc95-r0 fixes 1 vulnerabilities: CVE-2021-30465",
  "id": "CLEANSTART-2026-CN11164",
  "modified": "2026-07-30T09:40:01Z",
  "published": "2026-07-30T07:10:53Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://www.opencontainers.org"
    }
  ],
  "related": [],
  "schema_version": "1.7.3",
  "summary": "Security fixes in runc 1.0.0_rc95-r0",
  "upstream": [
    "CVE-2021-30465"
  ]
}

CVE-2021-30465 (GCVE-0-2021-30465)

Vulnerability from cvelistv5 – Published: 2021-05-27 00:00 – Updated: 2024-08-03 22:32

Summary

runc before 1.0.0-rc95 allows a Container Filesystem Breakout via Directory Traversal. To exploit the vulnerability, an attacker must be able to create multiple containers with a fairly specific mount configuration. The problem occurs via a symlink-exchange attack that relies on a race condition.

Severity

No CVSS data available.

CWE

Assigner

mitre

References

10 references

URL	Tags
https://github.com/opencontainers/runc/releases
http://www.openwall.com/lists/oss-security/2021/05/19/2	mailing-list
https://github.com/opencontainers/runc/security/a…
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://github.com/opencontainers/runc/commit/0ca…
https://bugzilla.opensuse.org/show_bug.cgi?id=1185405
https://security.netapp.com/advisory/ntap-2021070…
https://security.gentoo.org/glsa/202107-26	vendor-advisory
https://lists.debian.org/debian-lts-announce/2023…	mailing-list

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T22:32:40.599Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/opencontainers/runc/releases"
          },
          {
            "name": "[oss-security] 20210519 CVE-2021-30465: runc \u003c1.0.0-rc95 vulnerable to symlink-exchange attack",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/05/19/2"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/05/19/2"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/opencontainers/runc/security/advisories/GHSA-c3xm-pvg7-gh7r"
          },
          {
            "name": "FEDORA-2021-2eb67ba3c2",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4HOARVIT47RULTTFWAU7XBG4WY6TDDHV/"
          },
          {
            "name": "FEDORA-2021-0440f235a0",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/35ZW6NBZSBH5PWIT7JU4HXOXGFVDCOHH/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/opencontainers/runc/commit/0ca91f44f1664da834bc61115a849b56d22f595f"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://bugzilla.opensuse.org/show_bug.cgi?id=1185405"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210708-0003/"
          },
          {
            "name": "GLSA-202107-26",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202107-26"
          },
          {
            "name": "[debian-lts-announce] 20230327 [SECURITY] [DLA 3369-1] runc security update",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2023/03/msg00023.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "runc before 1.0.0-rc95 allows a Container Filesystem Breakout via Directory Traversal. To exploit the vulnerability, an attacker must be able to create multiple containers with a fairly specific mount configuration. The problem occurs via a symlink-exchange attack that relies on a race condition."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-03-27T00:00:00.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://github.com/opencontainers/runc/releases"
        },
        {
          "name": "[oss-security] 20210519 CVE-2021-30465: runc \u003c1.0.0-rc95 vulnerable to symlink-exchange attack",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2021/05/19/2"
        },
        {
          "url": "http://www.openwall.com/lists/oss-security/2021/05/19/2"
        },
        {
          "url": "https://github.com/opencontainers/runc/security/advisories/GHSA-c3xm-pvg7-gh7r"
        },
        {
          "name": "FEDORA-2021-2eb67ba3c2",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4HOARVIT47RULTTFWAU7XBG4WY6TDDHV/"
        },
        {
          "name": "FEDORA-2021-0440f235a0",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/35ZW6NBZSBH5PWIT7JU4HXOXGFVDCOHH/"
        },
        {
          "url": "https://github.com/opencontainers/runc/commit/0ca91f44f1664da834bc61115a849b56d22f595f"
        },
        {
          "url": "https://bugzilla.opensuse.org/show_bug.cgi?id=1185405"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20210708-0003/"
        },
        {
          "name": "GLSA-202107-26",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.gentoo.org/glsa/202107-26"
        },
        {
          "name": "[debian-lts-announce] 20230327 [SECURITY] [DLA 3369-1] runc security update",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2023/03/msg00023.html"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-30465",
    "datePublished": "2021-05-27T00:00:00.000Z",
    "dateReserved": "2021-04-08T00:00:00.000Z",
    "dateUpdated": "2024-08-03T22:32:40.599Z",
    "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.

Action not permitted

Vulnerability from cleanstart

CVE-2021-30465 (GCVE-0-2021-30465)

Tags

Sightings

Nomenclature