Vulnerability-Lookup

ubuntu-cve-2021-23239

Vulnerability from osv_ubuntu

Published

2021-01-12 09:15

Modified

2025-09-08 16:46

Summary

Details

The sudoedit personality of Sudo before 1.9.5 may allow a local unprivileged user to perform arbitrary directory-existence tests by winning a sudo_edit.c race condition in replacing a user-controlled directory by a symlink to an arbitrary path.

Severity

2.5 (Low)


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

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2021-23239	REPORT
	https://www.openwall.com/lists/oss-security/2021/…	REPORT
	https://ubuntu.com/security/notices/USN-4705-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2021-23239	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "sudo",
            "binary_version": "1.8.9p5-1ubuntu1.5+esm8"
          },
          {
            "binary_name": "sudo-ldap",
            "binary_version": "1.8.9p5-1ubuntu1.5+esm8"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.8.9p5-1ubuntu1.5+esm8?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.6p3-0ubuntu3",
        "1.8.8-2ubuntu1",
        "1.8.8-2ubuntu2",
        "1.8.9p4-1ubuntu1",
        "1.8.9p4-1ubuntu2",
        "1.8.9p5-1ubuntu1",
        "1.8.9p5-1ubuntu1.1",
        "1.8.9p5-1ubuntu1.2",
        "1.8.9p5-1ubuntu1.3",
        "1.8.9p5-1ubuntu1.4",
        "1.8.9p5-1ubuntu1.5+esm1",
        "1.8.9p5-1ubuntu1.5+esm2",
        "1.8.9p5-1ubuntu1.5+esm3",
        "1.8.9p5-1ubuntu1.5+esm5",
        "1.8.9p5-1ubuntu1.5+esm6",
        "1.8.9p5-1ubuntu1.5+esm7",
        "1.8.9p5-1ubuntu1.5+esm8"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "sudo",
            "binary_version": "1.8.16-0ubuntu1.10"
          },
          {
            "binary_name": "sudo-ldap",
            "binary_version": "1.8.16-0ubuntu1.10"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.8.16-0ubuntu1.10?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.16-0ubuntu1.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.12-1ubuntu3",
        "1.8.16-0ubuntu1",
        "1.8.16-0ubuntu1.1",
        "1.8.16-0ubuntu1.2",
        "1.8.16-0ubuntu1.3",
        "1.8.16-0ubuntu1.4",
        "1.8.16-0ubuntu1.5",
        "1.8.16-0ubuntu1.6",
        "1.8.16-0ubuntu1.7",
        "1.8.16-0ubuntu1.8",
        "1.8.16-0ubuntu1.9"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "sudo",
            "binary_version": "1.8.21p2-3ubuntu1.4"
          },
          {
            "binary_name": "sudo-ldap",
            "binary_version": "1.8.21p2-3ubuntu1.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.8.21p2-3ubuntu1.4?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.21p2-3ubuntu1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.20p2-1ubuntu1",
        "1.8.21p2-2ubuntu1",
        "1.8.21p2-3ubuntu1",
        "1.8.21p2-3ubuntu1.1",
        "1.8.21p2-3ubuntu1.2",
        "1.8.21p2-3ubuntu1.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "sudo",
            "binary_version": "1.8.31-1ubuntu1.2"
          },
          {
            "binary_name": "sudo-ldap",
            "binary_version": "1.8.31-1ubuntu1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.8.31-1ubuntu1.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.31-1ubuntu1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.27-1ubuntu4",
        "1.8.29-1ubuntu1",
        "1.8.31-1ubuntu1",
        "1.8.31-1ubuntu1.1"
      ]
    }
  ],
  "aliases": [],
  "details": "The sudoedit personality of Sudo before 1.9.5 may allow a local unprivileged user to perform arbitrary directory-existence tests by winning a sudo_edit.c race condition in replacing a user-controlled directory by a symlink to an arbitrary path.",
  "id": "UBUNTU-CVE-2021-23239",
  "modified": "2025-09-08T16:46:59Z",
  "published": "2021-01-12T09:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-23239"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2021/01/11/2"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4705-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-23239"
    }
  ],
  "related": [
    "USN-4705-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-23239"
  ]
}

CVE-2021-23239 (GCVE-0-2021-23239)

Vulnerability from cvelistv5 – Published: 2021-01-12 00:00 – Updated: 2024-08-03 19:05

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre

References

7 references

URL	Tags
https://bugzilla.suse.com/show_bug.cgi?id=CVE-202…
https://www.sudo.ws/stable.html#1.9.5
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://security.gentoo.org/glsa/202101-33	vendor-advisory
https://security.netapp.com/advisory/ntap-2021012…
https://lists.debian.org/debian-lts-announce/2022…	mailing-list

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T19:05:55.298Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2021-23239"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.sudo.ws/stable.html#1.9.5"
          },
          {
            "name": "FEDORA-2021-324479472c",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EE42Y35SMJOLONAIBNYNFC7J44UUZ2Y6/"
          },
          {
            "name": "FEDORA-2021-234d14bfcc",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMY4VSSBIND7VAYSN6T7XIWJRWG4GBB3/"
          },
          {
            "name": "GLSA-202101-33",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202101-33"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210129-0010/"
          },
          {
            "name": "[debian-lts-announce] 20221107 [SECURITY] [DLA 3181-1] sudo security update",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00007.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The sudoedit personality of Sudo before 1.9.5 may allow a local unprivileged user to perform arbitrary directory-existence tests by winning a sudo_edit.c race condition in replacing a user-controlled directory by a symlink to an arbitrary path."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-11-07T00:00:00.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2021-23239"
        },
        {
          "url": "https://www.sudo.ws/stable.html#1.9.5"
        },
        {
          "name": "FEDORA-2021-324479472c",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EE42Y35SMJOLONAIBNYNFC7J44UUZ2Y6/"
        },
        {
          "name": "FEDORA-2021-234d14bfcc",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMY4VSSBIND7VAYSN6T7XIWJRWG4GBB3/"
        },
        {
          "name": "GLSA-202101-33",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.gentoo.org/glsa/202101-33"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20210129-0010/"
        },
        {
          "name": "[debian-lts-announce] 20221107 [SECURITY] [DLA 3181-1] sudo security update",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00007.html"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-23239",
    "datePublished": "2021-01-12T00:00:00.000Z",
    "dateReserved": "2021-01-07T00:00:00.000Z",
    "dateUpdated": "2024-08-03T19:05:55.298Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

usn-4705-1

Vulnerability from osv_ubuntu

Published

2021-01-26 18:48

Modified

2026-04-27 14:11

Summary

sudo vulnerabilities

Details

It was discovered that Sudo incorrectly handled memory when parsing command lines. A local attacker could possibly use this issue to obtain unintended access to the administrator account. (CVE-2021-3156)

It was discovered that the Sudo sudoedit utility incorrectly handled checking directory permissions. A local attacker could possibly use this issue to bypass file permissions and determine if a directory exists or not. (CVE-2021-23239)

References

URL

Type

	https://ubuntu.com/security/notices/USN-4705-1	ADVISORY
	https://ubuntu.com/security/CVE-2021-3156	REPORT
	https://ubuntu.com/security/CVE-2021-23239	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-3156",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23239",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "sudo",
            "binary_version": "1.8.16-0ubuntu1.10"
          },
          {
            "binary_name": "sudo-ldap",
            "binary_version": "1.8.16-0ubuntu1.10"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.8.16-0ubuntu1.10?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.16-0ubuntu1.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.12-1ubuntu3",
        "1.8.16-0ubuntu1",
        "1.8.16-0ubuntu1.1",
        "1.8.16-0ubuntu1.2",
        "1.8.16-0ubuntu1.3",
        "1.8.16-0ubuntu1.4",
        "1.8.16-0ubuntu1.5",
        "1.8.16-0ubuntu1.6",
        "1.8.16-0ubuntu1.7",
        "1.8.16-0ubuntu1.8",
        "1.8.16-0ubuntu1.9"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-3156",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23239",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "sudo",
            "binary_version": "1.8.21p2-3ubuntu1.4"
          },
          {
            "binary_name": "sudo-ldap",
            "binary_version": "1.8.21p2-3ubuntu1.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.8.21p2-3ubuntu1.4?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.21p2-3ubuntu1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.20p2-1ubuntu1",
        "1.8.21p2-2ubuntu1",
        "1.8.21p2-3ubuntu1",
        "1.8.21p2-3ubuntu1.1",
        "1.8.21p2-3ubuntu1.2",
        "1.8.21p2-3ubuntu1.3"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-3156",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23239",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "sudo",
            "binary_version": "1.8.31-1ubuntu1.2"
          },
          {
            "binary_name": "sudo-ldap",
            "binary_version": "1.8.31-1ubuntu1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "sudo",
        "purl": "pkg:deb/ubuntu/sudo@1.8.31-1ubuntu1.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.31-1ubuntu1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.27-1ubuntu4",
        "1.8.29-1ubuntu1",
        "1.8.31-1ubuntu1",
        "1.8.31-1ubuntu1.1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that Sudo incorrectly handled memory when parsing command\nlines. A local attacker could possibly use this issue to obtain unintended\naccess to the administrator account. (CVE-2021-3156)\n\nIt was discovered that the Sudo sudoedit utility incorrectly handled\nchecking directory permissions. A local attacker could possibly use this\nissue to bypass file permissions and determine if a directory exists or\nnot.  (CVE-2021-23239)\n",
  "id": "USN-4705-1",
  "modified": "2026-04-27T14:11:26Z",
  "published": "2021-01-26T18:48:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4705-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3156"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-23239"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "sudo vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2021-3156",
    "UBUNTU-CVE-2021-23239"
  ]
}

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.

Action not permitted

ubuntu-cve-2021-23239

Vulnerability from osv_ubuntu

CVE-2021-23239 (GCVE-0-2021-23239)

usn-4705-1

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature