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CVE-2021-33634

Status: ModifiedMedium (5.5)—

iSulad uses the lcr+lxc runtime (default) to run malicious images, which can cause DOS.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Openeuler — ICR

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-33634",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-33634",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-09-09T14:22:10.912559Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "securities@openeuler.org",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 6.3,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4,
        "exploitabilityScore": 1.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "securities@openeuler.org",
      "affectedData": [
        {
          "repo": "https://gitee.com/src-openeuler/lcr",
          "vendor": "openEuler",
          "modules": [
            "runtime"
          ],
          "product": "lcr",
          "versions": [
            {
              "status": "affected",
              "changes": [
                {
                  "at": "0012-265-set-env-to-avoid-invoke-lxc-binary-directly.patch",
                  "status": "unaffected"
                },
                {
                  "at": "0008-266-set-env-to-avoid-invoke-lxc-binary-directly.patch",
                  "status": "unaffected"
                }
              ],
              "version": "0",
              "versionType": "patch",
              "lessThanOrEqual": "2.0.9-6,2.1.2-3"
            }
          ],
          "platforms": [
            "Linux"
          ],
          "packageName": "lcr",
          "programFiles": [
            "https://gitee.com/openeuler/lcr/blob/master/src/runtime/lcrcontainer.c"
          ],
          "collectionURL": "https://gitee.com/src-openeuler",
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2023-10-29T08:15:20.567",
  "references": [
    {
      "url": "https://gitee.com/src-openeuler/lcr/pulls/251/files",
      "tags": [
        "Patch"
      ],
      "source": "securities@openeuler.org"
    },
    {
      "url": "https://gitee.com/src-openeuler/lcr/pulls/257/files",
      "tags": [
        "Patch"
      ],
      "source": "securities@openeuler.org"
    },
    {
      "url": "https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1692",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "securities@openeuler.org"
    },
    {
      "url": "https://gitee.com/src-openeuler/lcr/pulls/251/files",
      "tags": [
        "Patch"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://gitee.com/src-openeuler/lcr/pulls/257/files",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1692",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "securities@openeuler.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-665"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "iSulad uses the lcr+lxc runtime (default) to run malicious images, which can cause DOS.\n\n"
    },
    {
      "lang": "es",
      "value": "iSulad utiliza el tiempo de ejecución lcr+lxc (predeterminado) para ejecutar imágenes maliciosas, lo que puede provocar DOS."
    }
  ],
  "lastModified": "2026-06-17T03:54:54.447",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openeuler:icr:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2E96C06C-47CA-4E04-B627-5B50BF6EA323",
              "versionEndExcluding": "2.0.9-6"
            },
            {
              "criteria": "cpe:2.3:a:openeuler:icr:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8AC37313-A13B-4BD1-BFBB-50753C3D3240",
              "versionEndExcluding": "2.1.2-3",
              "versionStartIncluding": "2.1.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "securities@openeuler.org"
}