GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2021-32549 (GCVE-0-2021-32549)

Vulnerability from cvelistv5 – Published: 2021-06-12 03:40 – Updated: 2024-09-16 23:11
VLAI
Title
apport read_file() function could follow maliciously constructed symbolic links
Summary
It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the openjdk-13 package apport hooks, it could expose private data to other local users.
CWE
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
  • CWE-61 - UNIX Symbolic Link (Symlink) Following
References
Impacted products
Vendor Product Version CPE status
Canonical apport Affected: 2.20.1 , < 2.20.1-0ubuntu2.30+esm1 (custom)
Affected: 2.20.9 , < 2.20.9-0ubuntu7.24 (custom)
Affected: 2.20.11-0ubuntu27 , < 2.20.11-0ubuntu27.18 (custom)
Affected: 2.20.11-0ubuntu50 , < 2.20.11-0ubuntu50.7 (custom)
Affected: 2.20.11-0ubuntu65 , < 2.20.11-0ubuntu65.1 (custom)
Affected: 2.14.1-0ubuntu3 , < 2.14.1-0ubuntu3.29+esm7 (custom)
guessed Create a notification for this product.
Date Public
2021-05-25 00:00
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T23:25:30.532Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "apport",
          "vendor": "Canonical",
          "versions": [
            {
              "lessThan": "2.20.1-0ubuntu2.30+esm1",
              "status": "affected",
              "version": "2.20.1",
              "versionType": "custom"
            },
            {
              "lessThan": "2.20.9-0ubuntu7.24",
              "status": "affected",
              "version": "2.20.9",
              "versionType": "custom"
            },
            {
              "lessThan": "2.20.11-0ubuntu27.18",
              "status": "affected",
              "version": "2.20.11-0ubuntu27",
              "versionType": "custom"
            },
            {
              "lessThan": "2.20.11-0ubuntu50.7",
              "status": "affected",
              "version": "2.20.11-0ubuntu50",
              "versionType": "custom"
            },
            {
              "lessThan": "2.20.11-0ubuntu65.1",
              "status": "affected",
              "version": "2.20.11-0ubuntu65",
              "versionType": "custom"
            },
            {
              "lessThan": "2.14.1-0ubuntu3.29+esm7",
              "status": "affected",
              "version": "2.14.1-0ubuntu3",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "maik@secfault-security.com (@fktio)"
        }
      ],
      "datePublic": "2021-05-25T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the openjdk-13 package apport hooks, it could expose private data to other local users."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-59",
              "description": "CWE-59 Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-61",
              "description": "CWE-61 UNIX Symbolic Link (Symlink) Following",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-06-12T03:40:37.000Z",
        "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
        "shortName": "canonical"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904"
        }
      ],
      "source": {
        "advisory": "https://ubuntu.com/security/notices/USN-4965-1",
        "defect": [
          "https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "apport read_file() function could follow maliciously constructed symbolic links",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@ubuntu.com",
          "DATE_PUBLIC": "2021-05-25T00:00:00.000Z",
          "ID": "CVE-2021-32549",
          "STATE": "PUBLIC",
          "TITLE": "apport read_file() function could follow maliciously constructed symbolic links"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "apport",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c",
                            "version_name": "2.20.1",
                            "version_value": "2.20.1-0ubuntu2.30+esm1"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "2.20.9",
                            "version_value": "2.20.9-0ubuntu7.24"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "2.20.11-0ubuntu27",
                            "version_value": "2.20.11-0ubuntu27.18"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "2.20.11-0ubuntu50",
                            "version_value": "2.20.11-0ubuntu50.7"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "2.20.11-0ubuntu65",
                            "version_value": "2.20.11-0ubuntu65.1"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "2.14.1-0ubuntu3",
                            "version_value": "2.14.1-0ubuntu3.29+esm7"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Canonical"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "maik@secfault-security.com (@fktio)"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the openjdk-13 package apport hooks, it could expose private data to other local users."
            }
          ]
        },
        "generator": {
          "engine": "Vulnogram 0.0.9"
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-59 Improper Link Resolution Before File Access (\u0027Link Following\u0027)"
                }
              ]
            },
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-61 UNIX Symbolic Link (Symlink) Following"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904",
              "refsource": "MISC",
              "url": "https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904"
            }
          ]
        },
        "source": {
          "advisory": "https://ubuntu.com/security/notices/USN-4965-1",
          "defect": [
            "https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904"
          ],
          "discovery": "EXTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
    "assignerShortName": "canonical",
    "cveId": "CVE-2021-32549",
    "datePublished": "2021-06-12T03:40:37.848Z",
    "dateReserved": "2021-05-10T00:00:00.000Z",
    "dateUpdated": "2024-09-16T23:11:32.731Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-32549",
      "date": "2026-09-16",
      "epss": "0.00289",
      "percentile": "0.21566"
    },
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*\", \"matchCriteriaId\": \"23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*\", \"matchCriteriaId\": \"902B8056-9E37-443B-8905-8AA93E2447FB\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:canonical:ubuntu_linux:20.10:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"338B3AAC-C147-4A31-95E7-6E8A6FB4B3FC\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:lts:*:*:*\", \"matchCriteriaId\": \"D5F0EBD8-0681-4AE6-90E5-78F8AAB39123\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"AAE4D2D0-CEEB-416F-8BC5-A7987DF56190\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the openjdk-13 package apport hooks, it could expose private data to other local users.\"}, {\"lang\": \"es\", \"value\": \"Se ha detectado que la funci\\u00f3n read_file() en el archivo apport/hookutils.py podr\\u00eda seguir enlaces simb\\u00f3licos o abrir FIFOs. Cuando esta funci\\u00f3n es usada por el paquete openjdk-13 apport hooks, podr\\u00eda exponer datos privados a otros usuarios locales\"}]",
      "id": "CVE-2021-32549",
      "lastModified": "2024-11-21T06:07:14.887",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"security@ubuntu.com\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L\", \"baseScore\": 7.3, \"baseSeverity\": \"HIGH\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"CHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"LOW\"}, \"exploitabilityScore\": 2.0, \"impactScore\": 4.7}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N\", \"baseScore\": 5.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 3.6}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:L/AC:L/Au:N/C:P/I:N/A:N\", \"baseScore\": 2.1, \"accessVector\": \"LOCAL\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"PARTIAL\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"NONE\"}, \"baseSeverity\": \"LOW\", \"exploitabilityScore\": 3.9, \"impactScore\": 2.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2021-06-12T04:15:11.820",
      "references": "[{\"url\": \"https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904\", \"source\": \"security@ubuntu.com\", \"tags\": [\"Issue Tracking\", \"Vendor Advisory\"]}, {\"url\": \"https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Issue Tracking\", \"Vendor Advisory\"]}]",
      "sourceIdentifier": "security@ubuntu.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"security@ubuntu.com\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-59\"}, {\"lang\": \"en\", \"value\": \"CWE-61\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-59\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-32549\",\"sourceIdentifier\":\"security@ubuntu.com\",\"published\":\"2021-06-12T04:15:11.820\",\"lastModified\":\"2024-11-21T06:07:14.887\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the openjdk-13 package apport hooks, it could expose private data to other local users.\"},{\"lang\":\"es\",\"value\":\"Se ha detectado que la funci\u00f3n read_file() en el archivo apport/hookutils.py podr\u00eda seguir enlaces simb\u00f3licos o abrir FIFOs. Cuando esta funci\u00f3n es usada por el paquete openjdk-13 apport hooks, podr\u00eda exponer datos privados a otros usuarios locales\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@ubuntu.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L\",\"baseScore\":7.3,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.0,\"impactScore\":4.7},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:L/Au:N/C:P/I:N/A:N\",\"baseScore\":2.1,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"LOW\",\"exploitabilityScore\":3.9,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"security@ubuntu.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-59\"},{\"lang\":\"en\",\"value\":\"CWE-61\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-59\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*\",\"matchCriteriaId\":\"23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*\",\"matchCriteriaId\":\"902B8056-9E37-443B-8905-8AA93E2447FB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:20.10:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"338B3AAC-C147-4A31-95E7-6E8A6FB4B3FC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:lts:*:*:*\",\"matchCriteriaId\":\"D5F0EBD8-0681-4AE6-90E5-78F8AAB39123\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"AAE4D2D0-CEEB-416F-8BC5-A7987DF56190\"}]}]}],\"references\":[{\"url\":\"https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904\",\"source\":\"security@ubuntu.com\",\"tags\":[\"Issue Tracking\",\"Vendor Advisory\"]},{\"url\":\"https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "current_release_date": "2026-03-27T14:03:13+00:00",
      "cve": "CVE-2021-32549",
      "id": "CVE-2021-32549",
      "initial_release_date": "2021-05-25T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "apport read_file() function could follow maliciously constructed symbolic links",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-32549.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2025-04-25T04:40:39Z",
      "cve": "CVE-2021-32549",
      "id": "CVE-2021-32549",
      "initial_release_date": "2023-02-15T03:41:06Z",
      "product_status:known_not_affected": "8",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-32549",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-32549.json",
      "version": "7"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.

Loading…

Detection rules are retrieved from Rulezet.

Loading…

Loading…

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.


Loading…