Vulnerability-Lookup

CVE-2021-33641 (GCVE-0-2021-33641)

Vulnerability from cvelistv5 – Published: 2023-01-20 00:00 – Updated: 2025-04-03 20:03

Summary

When processing files, malloc stores the data of the current line. When processing comments, malloc incorrectly accesses the released memory (use after free).

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-02 15:37 UTC

CWE

CWE-416 - : use after free

Assigner

openEuler CNA under the mitre root

CNA scorecard – unranked: 0 records in the last 180 days, 10 needed details

References

1 reference

URL	Tags
https://gitee.com/src-openeuler/byacc/commit/5022…

Impacted products

1 product

Vendor	Product	Version	CPE status
n/a	byacc	Affected: <1.9.20200330 and <2.0.20210808

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T23:58:21.542Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://gitee.com/src-openeuler/byacc/commit/50225f48c6b53e9d7c936681a06682404cb8ec4d"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-33641",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-02T15:37:25.468877Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-04-03T20:03:08.779Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "byacc",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c1.9.20200330 and \u003c2.0.20210808"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "When processing files, malloc stores the data of the current line. When processing comments, malloc incorrectly accesses the released memory (use after free)."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416 : use after free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-01-20T00:00:00.000Z",
        "orgId": "7e1ac599-2767-43fa-b3ea-f10178cc98f2",
        "shortName": "openEuler"
      },
      "references": [
        {
          "url": "https://gitee.com/src-openeuler/byacc/commit/50225f48c6b53e9d7c936681a06682404cb8ec4d"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "7e1ac599-2767-43fa-b3ea-f10178cc98f2",
    "assignerShortName": "openEuler",
    "cveId": "CVE-2021-33641",
    "datePublished": "2023-01-20T00:00:00.000Z",
    "dateReserved": "2021-05-28T00:00:00.000Z",
    "dateUpdated": "2025-04-03T20:03:08.779Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-33641",
      "date": "2026-11-06",
      "epss": "0.00278",
      "percentile": "0.20301"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:openeuler:byacc:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "C2399FF0-CD0D-4170-B923-1F3F7236B081",
                    "versionEndExcluding": "1.9.20200330",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:openeuler:byacc:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "C944FA70-29B9-4A7B-B811-105C327BC3D6",
                    "versionEndExcluding": "2.0.20210808",
                    "versionStartIncluding": "2.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "When processing files, malloc stores the data of the current line. When processing comments, malloc incorrectly accesses the released memory (use after free)."
          },
          {
            "lang": "es",
            "value": "Al procesar archivos, malloc almacena los datos de la l\u00ednea actual. Al procesar comentarios, malloc accede incorrectamente a la memoria liberada (\u00fasela despu\u00e9s de liberarla)."
          }
        ],
        "id": "CVE-2021-33641",
        "lastModified": "2025-04-03T20:15:16.000",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ]
        },
        "published": "2023-01-20T21:15:10.803",
        "references": [
          {
            "source": "securities@openeuler.org",
            "tags": [
              "Permissions Required",
              "Third Party Advisory"
            ],
            "url": "https://gitee.com/src-openeuler/byacc/commit/50225f48c6b53e9d7c936681a06682404cb8ec4d"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Permissions Required",
              "Third Party Advisory"
            ],
            "url": "https://gitee.com/src-openeuler/byacc/commit/50225f48c6b53e9d7c936681a06682404cb8ec4d"
          }
        ],
        "sourceIdentifier": "securities@openeuler.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-416"
              }
            ],
            "source": "securities@openeuler.org",
            "type": "Secondary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-416"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T13:22:50+00:00",
      "cve": "CVE-2021-33641",
      "id": "CVE-2021-33641",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_affected": "2",
      "product_status:known_not_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "byacc: malloc incorrectly accessing released memory leads to use after free",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-33641.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2024-08-03T23:58:21.542Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
              {
                "tags": [
                  "x_transferred"
                ],
                "url": "https://gitee.com/src-openeuler/byacc/commit/50225f48c6b53e9d7c936681a06682404cb8ec4d"
              }
            ],
            "title": "CVE Program Container"
          },
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "LOW",
                  "attackVector": "LOCAL",
                  "availabilityImpact": "HIGH",
                  "baseScore": 7.8,
                  "baseSeverity": "HIGH",
                  "confidentialityImpact": "HIGH",
                  "integrityImpact": "HIGH",
                  "privilegesRequired": "NONE",
                  "scope": "UNCHANGED",
                  "userInteraction": "REQUIRED",
                  "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2021-33641",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-04-02T15:37:25.468877Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-04-02T15:38:06.885Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "byacc",
              "vendor": "n/a",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c1.9.20200330 and \u003c2.0.20210808"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "When processing files, malloc stores the data of the current line. When processing comments, malloc incorrectly accesses the released memory (use after free)."
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-416",
                  "description": "CWE-416 : use after free",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2023-01-20T00:00:00.000Z",
            "orgId": "7e1ac599-2767-43fa-b3ea-f10178cc98f2",
            "shortName": "openEuler"
          },
          "references": [
            {
              "url": "https://gitee.com/src-openeuler/byacc/commit/50225f48c6b53e9d7c936681a06682404cb8ec4d"
            }
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "7e1ac599-2767-43fa-b3ea-f10178cc98f2",
        "assignerShortName": "openEuler",
        "cveId": "CVE-2021-33641",
        "datePublished": "2023-01-20T00:00:00.000Z",
        "dateReserved": "2021-05-28T00:00:00.000Z",
        "dateUpdated": "2025-04-03T20:03:08.779Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}

FKIE_CVE-2021-33641

Vulnerability from fkie_nvd - Published: 2023-01-20 21:15 - Updated: 2026-06-17 03:54

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Summary

When processing files, malloc stores the data of the current line. When processing comments, malloc incorrectly accesses the released memory (use after free).

References

	URL	Tags
	securities@openeuler.org	https://gitee.com/src-openeuler/byacc/commit/50225f48c6b53e9d7c936681a06682404cb8ec4d	Permissions Required, Third Party Advisory
	af854a3a-2127-422b-91ae-364da2661108	https://gitee.com/src-openeuler/byacc/commit/50225f48c6b53e9d7c936681a06682404cb8ec4d	Permissions Required, Third Party Advisory

Impacted products

	Vendor	Product	Version
	openeuler	byacc	*
	openeuler	byacc	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "byacc",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c1.9.20200330 and \u003c2.0.20210808"
            }
          ]
        }
      ],
      "source": "securities@openeuler.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openeuler:byacc:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C2399FF0-CD0D-4170-B923-1F3F7236B081",
              "versionEndExcluding": "1.9.20200330",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openeuler:byacc:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C944FA70-29B9-4A7B-B811-105C327BC3D6",
              "versionEndExcluding": "2.0.20210808",
              "versionStartIncluding": "2.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "When processing files, malloc stores the data of the current line. When processing comments, malloc incorrectly accesses the released memory (use after free)."
    },
    {
      "lang": "es",
      "value": "Al procesar archivos, malloc almacena los datos de la l\u00ednea actual. Al procesar comentarios, malloc accede incorrectamente a la memoria liberada (\u00fasela despu\u00e9s de liberarla)."
    }
  ],
  "id": "CVE-2021-33641",
  "lastModified": "2026-06-17T03:54:55.340",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-33641",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-04-02T15:37:25.468877Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2023-01-20T21:15:10.803",
  "references": [
    {
      "source": "securities@openeuler.org",
      "tags": [
        "Permissions Required",
        "Third Party Advisory"
      ],
      "url": "https://gitee.com/src-openeuler/byacc/commit/50225f48c6b53e9d7c936681a06682404cb8ec4d"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Permissions Required",
        "Third Party Advisory"
      ],
      "url": "https://gitee.com/src-openeuler/byacc/commit/50225f48c6b53e9d7c936681a06682404cb8ec4d"
    }
  ],
  "sourceIdentifier": "securities@openeuler.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "securities@openeuler.org",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-56C6-2PFC-9RVH

Vulnerability from github – Published: 2023-01-20 21:30 – Updated: 2023-02-06 21:30

Details

When processing files, malloc stores the data of the current line. When processing comments, malloc incorrectly accesses the released memory (use after free).

Severity

9.8 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-33641"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-01-20T21:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "When processing files, malloc stores the data of the current line. When processing comments, malloc incorrectly accesses the released memory (use after free).",
  "id": "GHSA-56c6-2pfc-9rvh",
  "modified": "2023-02-06T21:30:34Z",
  "published": "2023-01-20T21:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33641"
    },
    {
      "type": "WEB",
      "url": "https://gitee.com/src-openeuler/byacc/commit/50225f48c6b53e9d7c936681a06682404cb8ec4d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GSD-2021-33641

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

When processing files, malloc stores the data of the current line. When processing comments, malloc incorrectly accesses the released memory (use after free).

Aliases

CVE-2021-33641

Aliases

CVE-2021-33641

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2021-33641",
    "id": "GSD-2021-33641"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-33641"
      ],
      "details": "When processing files, malloc stores the data of the current line. When processing comments, malloc incorrectly accesses the released memory (use after free).",
      "id": "GSD-2021-33641",
      "modified": "2023-12-13T01:23:18.766275Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "securities@openeuler.org",
        "ID": "CVE-2021-33641",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "byacc",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "\u003c1.9.20200330 and \u003c2.0.20210808"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "When processing files, malloc stores the data of the current line. When processing comments, malloc incorrectly accesses the released memory (use after free)."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-416 : use after free"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://gitee.com/src-openeuler/byacc/commit/50225f48c6b53e9d7c936681a06682404cb8ec4d",
            "refsource": "MISC",
            "url": "https://gitee.com/src-openeuler/byacc/commit/50225f48c6b53e9d7c936681a06682404cb8ec4d"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:openeuler:byacc:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "2.0.20210808",
                "versionStartIncluding": "2.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:openeuler:byacc:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.9.20200330",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "securities@openeuler.org",
          "ID": "CVE-2021-33641"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "When processing files, malloc stores the data of the current line. When processing comments, malloc incorrectly accesses the released memory (use after free)."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-416"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://gitee.com/src-openeuler/byacc/commit/50225f48c6b53e9d7c936681a06682404cb8ec4d",
              "refsource": "MISC",
              "tags": [
                "Permissions Required",
                "Third Party Advisory"
              ],
              "url": "https://gitee.com/src-openeuler/byacc/commit/50225f48c6b53e9d7c936681a06682404cb8ec4d"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2023-09-26T19:53Z",
      "publishedDate": "2023-01-20T21:15Z"
    }
  }
}

OESA-2023-1033 (CVE-2021-33641)

Vulnerability from osv_openeuler – Published: 2023-01-13 11:05 – Updated: 2026-08-06 11:05 – Source website

Summary

byacc security update

Details

Berkeley Yacc is an LALR(1) parser generator. Berkeley Yacc has been made as compatible as possible with AT&T Yacc. Berkeley Yacc can accept any input specification that conforms to the AT&T Yacc documentation. Specifications that take advantage of undocumented features of AT&T Yacc will probably be rejected.

Security Fix(es):

No description is available for this CVE.(CVE-2021-33641)

No description is available for this CVE.(CVE-2021-33642)

Severity

5.5 (Medium)


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

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-33641	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-33642	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "byacc-debuginfo-1.9.20200330-2.oe1.aarch64.rpm",
          "byacc-1.9.20200330-2.oe1.aarch64.rpm",
          "byacc-debugsource-1.9.20200330-2.oe1.aarch64.rpm"
        ],
        "noarch": [
          "byacc-help-1.9.20200330-2.oe1.noarch.rpm"
        ],
        "src": [
          "byacc-1.9.20200330-2.oe1.src.rpm"
        ],
        "x86_64": [
          "byacc-1.9.20200330-2.oe1.x86_64.rpm",
          "byacc-debuginfo-1.9.20200330-2.oe1.x86_64.rpm",
          "byacc-debugsource-1.9.20200330-2.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "byacc",
        "purl": "pkg:rpm/openEuler/byacc\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.9.20200330-2.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "byacc-debuginfo-1.9.20200330-2.oe1.aarch64.rpm",
          "byacc-debugsource-1.9.20200330-2.oe1.aarch64.rpm",
          "byacc-1.9.20200330-2.oe1.aarch64.rpm"
        ],
        "noarch": [
          "byacc-help-1.9.20200330-2.oe1.noarch.rpm"
        ],
        "src": [
          "byacc-1.9.20200330-2.oe1.src.rpm"
        ],
        "x86_64": [
          "byacc-debuginfo-1.9.20200330-2.oe1.x86_64.rpm",
          "byacc-debugsource-1.9.20200330-2.oe1.x86_64.rpm",
          "byacc-1.9.20200330-2.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP3",
        "name": "byacc",
        "purl": "pkg:rpm/openEuler/byacc\u0026distro=openEuler-20.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.9.20200330-2.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "byacc-2.0.20210808-4.oe2203.aarch64.rpm",
          "byacc-debugsource-2.0.20210808-4.oe2203.aarch64.rpm",
          "byacc-debuginfo-2.0.20210808-4.oe2203.aarch64.rpm",
          "byacc-debugsource-2.0.20210808-4.oe2203sp1.aarch64.rpm",
          "byacc-debuginfo-2.0.20210808-4.oe2203sp1.aarch64.rpm",
          "byacc-2.0.20210808-4.oe2203sp1.aarch64.rpm"
        ],
        "noarch": [
          "byacc-help-2.0.20210808-4.oe2203.noarch.rpm",
          "byacc-help-2.0.20210808-4.oe2203sp1.noarch.rpm"
        ],
        "src": [
          "byacc-2.0.20210808-4.oe2203.src.rpm",
          "byacc-2.0.20210808-4.oe2203sp1.src.rpm"
        ],
        "x86_64": [
          "byacc-2.0.20210808-4.oe2203.x86_64.rpm",
          "byacc-debuginfo-2.0.20210808-4.oe2203.x86_64.rpm",
          "byacc-debugsource-2.0.20210808-4.oe2203.x86_64.rpm",
          "byacc-debugsource-2.0.20210808-4.oe2203sp1.x86_64.rpm",
          "byacc-debuginfo-2.0.20210808-4.oe2203sp1.x86_64.rpm",
          "byacc-2.0.20210808-4.oe2203sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS",
        "name": "byacc",
        "purl": "pkg:rpm/openEuler/byacc\u0026distro=openEuler-22.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.20210808-4.oe2203sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "byacc-debugsource-2.0.20210808-4.oe2203sp1.aarch64.rpm",
          "byacc-debuginfo-2.0.20210808-4.oe2203sp1.aarch64.rpm",
          "byacc-2.0.20210808-4.oe2203sp1.aarch64.rpm"
        ],
        "noarch": [
          "byacc-help-2.0.20210808-4.oe2203sp1.noarch.rpm"
        ],
        "src": [
          "byacc-2.0.20210808-4.oe2203sp1.src.rpm"
        ],
        "x86_64": [
          "byacc-debugsource-2.0.20210808-4.oe2203sp1.x86_64.rpm",
          "byacc-debuginfo-2.0.20210808-4.oe2203sp1.x86_64.rpm",
          "byacc-2.0.20210808-4.oe2203sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP1",
        "name": "byacc",
        "purl": "pkg:rpm/openEuler/byacc\u0026distro=openEuler-22.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.20210808-4.oe2203sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Berkeley Yacc is an LALR(1) parser generator.  Berkeley Yacc has been made as compatible as possible with AT\u0026amp;T Yacc.  Berkeley Yacc can accept any input specification that conforms to the AT\u0026amp;T Yacc documentation.  Specifications that take advantage of undocumented features of AT\u0026amp;T Yacc will probably be rejected.\r\n\r\nSecurity Fix(es):\r\n\r\nNo description is available for this CVE.(CVE-2021-33641)\r\n\r\nNo description is available for this CVE.(CVE-2021-33642)",
  "id": "OESA-2023-1033",
  "modified": "2026-08-06T11:05:30Z",
  "published": "2023-01-13T11:05:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1033"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33641"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33642"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "byacc security update",
  "upstream": [
    "CVE-2021-33641",
    "CVE-2021-33642"
  ]
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

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.

Action not permitted

CVE-2021-33641 (GCVE-0-2021-33641)

FKIE_CVE-2021-33641

GHSA-56C6-2PFC-9RVH

GSD-2021-33641

OESA-2023-1033 (CVE-2021-33641)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour