ubuntu-cve-2024-28820
Vulnerability from osv_ubuntu
Published
2024-06-27 16:15
Modified
2026-05-20 15:08
Summary
Details

Buffer overflow in the extract_openvpn_cr function in openvpn-cr.c in openvpn-auth-ldap (aka the Three Rings Auth-LDAP plugin for OpenVPN) 2.0.4 allows attackers with a valid LDAP username and who can control the challenge/response password field to pass a string with more than 14 colons into this field and cause a buffer overflow.

Severity
6.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "openvpn-auth-ldap",
            "binary_version": "2.0.3-6.1ubuntu0.16.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "openvpn-auth-ldap",
        "purl": "pkg:deb/ubuntu/openvpn-auth-ldap@2.0.3-6.1ubuntu0.16.04.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.3-6.1",
        "2.0.3-6.1ubuntu0.16.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "openvpn-auth-ldap",
            "binary_version": "2.0.3-6.1ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "openvpn-auth-ldap",
        "purl": "pkg:deb/ubuntu/openvpn-auth-ldap@2.0.3-6.1ubuntu2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.3-6.1ubuntu1",
        "2.0.3-6.1ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "openvpn-auth-ldap",
            "binary_version": "2.0.4-1ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "openvpn-auth-ldap",
        "purl": "pkg:deb/ubuntu/openvpn-auth-ldap@2.0.4-1ubuntu2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.4-1ubuntu1",
        "2.0.4-1ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "openvpn-auth-ldap",
            "binary_version": "2.0.4-1ubuntu4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "openvpn-auth-ldap",
        "purl": "pkg:deb/ubuntu/openvpn-auth-ldap@2.0.4-1ubuntu4?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.4-1ubuntu4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "openvpn-auth-ldap",
            "binary_version": "2.0.4-3build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "openvpn-auth-ldap",
        "purl": "pkg:deb/ubuntu/openvpn-auth-ldap@2.0.4-3build1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.4-3build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "openvpn-auth-ldap",
            "binary_version": "2.0.4-5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "openvpn-auth-ldap",
        "purl": "pkg:deb/ubuntu/openvpn-auth-ldap@2.0.4-5?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.4-4",
        "2.0.4-5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "openvpn-auth-ldap",
            "binary_version": "2.0.4-5build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "openvpn-auth-ldap",
        "purl": "pkg:deb/ubuntu/openvpn-auth-ldap@2.0.4-5build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.4-5",
        "2.0.4-5build1"
      ]
    }
  ],
  "aliases": [],
  "details": "Buffer overflow in the extract_openvpn_cr function in openvpn-cr.c in openvpn-auth-ldap (aka the Three Rings Auth-LDAP plugin for OpenVPN) 2.0.4 allows attackers with a valid LDAP username and who can control the challenge/response password field to pass a string with more than 14 colons into this field and cause a buffer overflow.",
  "id": "UBUNTU-CVE-2024-28820",
  "modified": "2026-05-20T15:08:59Z",
  "published": "2024-06-27T16:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-28820"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-28820"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/threerings/openvpn-auth-ldap/pull/92"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/threerings/openvpn-auth-ldap/tags"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2024-28820"
  ]
}



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