ubuntu-cve-2023-4641
Vulnerability from osv_ubuntu
Published
2023-12-27 16:15
Modified
2025-09-08 16:55
Summary
Details

A flaw was found in shadow-utils. When asking for a new password, shadow-utils asks the password twice. If the password fails on the second attempt, shadow-utils fails in cleaning the buffer used to store the first entry. This may allow an attacker with enough access to retrieve the password from the memory.

Severity
4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
N/A (UNKNOWN)
low
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "login",
            "binary_version": "1:4.1.5.1-1ubuntu9.5+esm4"
          },
          {
            "binary_name": "passwd",
            "binary_version": "1:4.1.5.1-1ubuntu9.5+esm4"
          },
          {
            "binary_name": "uidmap",
            "binary_version": "1:4.1.5.1-1ubuntu9.5+esm4"
          }
        ],
        "priority_reason": "Unlikely attack scenario"
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "shadow",
        "purl": "pkg:deb/ubuntu/shadow@1:4.1.5.1-1ubuntu9.5+esm4?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:4.1.5.1-1ubuntu9.5+esm4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:4.1.5.1-1ubuntu6",
        "1:4.1.5.1-1ubuntu7",
        "1:4.1.5.1-1ubuntu8",
        "1:4.1.5.1-1ubuntu9",
        "1:4.1.5.1-1ubuntu9.1",
        "1:4.1.5.1-1ubuntu9.2",
        "1:4.1.5.1-1ubuntu9.4",
        "1:4.1.5.1-1ubuntu9.5",
        "1:4.1.5.1-1ubuntu9.5+esm1",
        "1:4.1.5.1-1ubuntu9.5+esm2",
        "1:4.1.5.1-1ubuntu9.5+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "login",
            "binary_version": "1:4.2-3.1ubuntu5.5+esm4"
          },
          {
            "binary_name": "passwd",
            "binary_version": "1:4.2-3.1ubuntu5.5+esm4"
          },
          {
            "binary_name": "uidmap",
            "binary_version": "1:4.2-3.1ubuntu5.5+esm4"
          }
        ],
        "priority_reason": "Unlikely attack scenario"
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "shadow",
        "purl": "pkg:deb/ubuntu/shadow@1:4.2-3.1ubuntu5.5+esm4?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:4.2-3.1ubuntu5.5+esm4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:4.1.5.1-1.1ubuntu7",
        "1:4.2-3.1ubuntu1",
        "1:4.2-3.1ubuntu2",
        "1:4.2-3.1ubuntu3",
        "1:4.2-3.1ubuntu4",
        "1:4.2-3.1ubuntu5",
        "1:4.2-3.1ubuntu5.2",
        "1:4.2-3.1ubuntu5.3",
        "1:4.2-3.1ubuntu5.4",
        "1:4.2-3.1ubuntu5.5+esm1",
        "1:4.2-3.1ubuntu5.5+esm2",
        "1:4.2-3.1ubuntu5.5+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "login",
            "binary_version": "1:4.5-1ubuntu2.5+esm1"
          },
          {
            "binary_name": "passwd",
            "binary_version": "1:4.5-1ubuntu2.5+esm1"
          },
          {
            "binary_name": "uidmap",
            "binary_version": "1:4.5-1ubuntu2.5+esm1"
          }
        ],
        "priority_reason": "Unlikely attack scenario"
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "shadow",
        "purl": "pkg:deb/ubuntu/shadow@1:4.5-1ubuntu2.5+esm1?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:4.5-1ubuntu2.5+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:4.2-3.2ubuntu4",
        "1:4.5-1ubuntu1",
        "1:4.5-1ubuntu2",
        "1:4.5-1ubuntu2.2",
        "1:4.5-1ubuntu2.3",
        "1:4.5-1ubuntu2.4",
        "1:4.5-1ubuntu2.5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "login",
            "binary_version": "1:4.8.1-1ubuntu5.20.04.5"
          },
          {
            "binary_name": "passwd",
            "binary_version": "1:4.8.1-1ubuntu5.20.04.5"
          },
          {
            "binary_name": "uidmap",
            "binary_version": "1:4.8.1-1ubuntu5.20.04.5"
          }
        ],
        "priority_reason": "Unlikely attack scenario"
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "shadow",
        "purl": "pkg:deb/ubuntu/shadow@1:4.8.1-1ubuntu5.20.04.5?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:4.8.1-1ubuntu5.20.04.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:4.5-1.1ubuntu4",
        "1:4.8-1ubuntu1",
        "1:4.8.1-1ubuntu1",
        "1:4.8.1-1ubuntu2",
        "1:4.8.1-1ubuntu3",
        "1:4.8.1-1ubuntu4",
        "1:4.8.1-1ubuntu5",
        "1:4.8.1-1ubuntu5.20.04",
        "1:4.8.1-1ubuntu5.20.04.1",
        "1:4.8.1-1ubuntu5.20.04.2",
        "1:4.8.1-1ubuntu5.20.04.3",
        "1:4.8.1-1ubuntu5.20.04.4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "login",
            "binary_version": "1:4.8.1-2ubuntu2.2"
          },
          {
            "binary_name": "passwd",
            "binary_version": "1:4.8.1-2ubuntu2.2"
          },
          {
            "binary_name": "uidmap",
            "binary_version": "1:4.8.1-2ubuntu2.2"
          }
        ],
        "priority_reason": "Unlikely attack scenario"
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "shadow",
        "purl": "pkg:deb/ubuntu/shadow@1:4.8.1-2ubuntu2.2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:4.8.1-2ubuntu2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:4.8.1-1ubuntu9",
        "1:4.8.1-1ubuntu10",
        "1:4.8.1-2ubuntu1",
        "1:4.8.1-2ubuntu2",
        "1:4.8.1-2ubuntu2.1"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in shadow-utils. When asking for a new password, shadow-utils asks the password twice. If the password fails on the second attempt, shadow-utils fails in cleaning the buffer used to store the first entry. This may allow an attacker with enough access to retrieve the password from the memory.",
  "id": "UBUNTU-CVE-2023-4641",
  "modified": "2025-09-08T16:55:56Z",
  "published": "2023-12-27T16:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-4641"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6640-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-4641"
    }
  ],
  "related": [
    "USN-6640-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2023-4641"
  ]
}



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Nomenclature

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