usn-7542-1
Vulnerability from osv_ubuntu
Published
2025-05-28 14:41
Modified
2026-06-25 10:46
Summary
krb5 vulnerability
Details

It was discovered that Kerberos allowed the usage of weak cryptographic standards. An attacker could possibly use this issue to expose sensitive information.

This update introduces the allow_rc4 and allow_des3 configuration options, and disables the usage of RC4 and 3DES ciphers by default. Users are advised to discontinue their usage and upgrade to stronger encryption protocols. If the use of the insecure RC4 and 3DES algorithms is necessary, they can be enabled with the aforementioned configuration options.


{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-3576",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:14.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "krb5-admin-server",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "krb5-gss-samples",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "krb5-kdc",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "krb5-kdc-ldap",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "krb5-locales",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "krb5-multidev",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "krb5-otp",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "krb5-pkinit",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "krb5-user",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "libgssapi-krb5-2",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "libgssrpc4",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "libk5crypto3",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "libkadm5clnt-mit9",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "libkadm5srv-mit8",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "libkadm5srv-mit9",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "libkdb5-7",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "libkrad0",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "libkrb5-3",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          },
          {
            "binary_name": "libkrb5support0",
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "krb5",
        "purl": "pkg:deb/ubuntu/krb5@1.12+dfsg-2ubuntu5.4+esm7?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.12+dfsg-2ubuntu5.4+esm7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.10.1+dfsg-6.1ubuntu1",
        "1.11.3+dfsg-3ubuntu2",
        "1.12+dfsg-2ubuntu1",
        "1.12+dfsg-2ubuntu2",
        "1.12+dfsg-2ubuntu3",
        "1.12+dfsg-2ubuntu4",
        "1.12+dfsg-2ubuntu4.2",
        "1.12+dfsg-2ubuntu5",
        "1.12+dfsg-2ubuntu5.1",
        "1.12+dfsg-2ubuntu5.2",
        "1.12+dfsg-2ubuntu5.3",
        "1.12+dfsg-2ubuntu5.4",
        "1.12+dfsg-2ubuntu5.4+esm1",
        "1.12+dfsg-2ubuntu5.4+esm2",
        "1.12+dfsg-2ubuntu5.4+esm3",
        "1.12+dfsg-2ubuntu5.4+esm4",
        "1.12+dfsg-2ubuntu5.4+esm5",
        "1.12+dfsg-2ubuntu5.4+esm6"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-3576",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "krb5-admin-server",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "krb5-gss-samples",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "krb5-k5tls",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "krb5-kdc",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "krb5-kdc-ldap",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "krb5-locales",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "krb5-multidev",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "krb5-otp",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "krb5-pkinit",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "krb5-user",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "libgssapi-krb5-2",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "libgssrpc4",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "libk5crypto3",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "libkadm5clnt-mit9",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "libkadm5srv-mit9",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "libkdb5-8",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "libkrad0",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "libkrb5-3",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          },
          {
            "binary_name": "libkrb5support0",
            "binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "krb5",
        "purl": "pkg:deb/ubuntu/krb5@1.13.2+dfsg-5ubuntu2.2+esm7?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.13.2+dfsg-5ubuntu2.2+esm7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.13.2+dfsg-2",
        "1.13.2+dfsg-3",
        "1.13.2+dfsg-4",
        "1.13.2+dfsg-5",
        "1.13.2+dfsg-5ubuntu1",
        "1.13.2+dfsg-5ubuntu2",
        "1.13.2+dfsg-5ubuntu2.1",
        "1.13.2+dfsg-5ubuntu2.1+esm1",
        "1.13.2+dfsg-5ubuntu2.2",
        "1.13.2+dfsg-5ubuntu2.2+esm3",
        "1.13.2+dfsg-5ubuntu2.2+esm4",
        "1.13.2+dfsg-5ubuntu2.2+esm5",
        "1.13.2+dfsg-5ubuntu2.2+esm6"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-3576",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "krb5-admin-server",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "krb5-gss-samples",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "krb5-k5tls",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "krb5-kdc",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "krb5-kdc-ldap",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "krb5-kpropd",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "krb5-locales",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "krb5-multidev",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "krb5-otp",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "krb5-pkinit",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "krb5-user",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "libgssapi-krb5-2",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "libgssrpc4",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "libk5crypto3",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "libkadm5clnt-mit11",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "libkadm5srv-mit11",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "libkdb5-9",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "libkrad0",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "libkrb5-3",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          },
          {
            "binary_name": "libkrb5support0",
            "binary_version": "1.16-2ubuntu0.4+esm5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "krb5",
        "purl": "pkg:deb/ubuntu/krb5@1.16-2ubuntu0.4+esm5?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.16-2ubuntu0.4+esm5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.15.1-2",
        "1.16-2",
        "1.16-2build1",
        "1.16-2ubuntu0.1",
        "1.16-2ubuntu0.1+esm1",
        "1.16-2ubuntu0.2",
        "1.16-2ubuntu0.3",
        "1.16-2ubuntu0.4",
        "1.16-2ubuntu0.4+esm1",
        "1.16-2ubuntu0.4+esm2",
        "1.16-2ubuntu0.4+esm3"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-3576",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "krb5-admin-server",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "krb5-gss-samples",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "krb5-k5tls",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "krb5-kdc",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "krb5-kdc-ldap",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "krb5-kpropd",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "krb5-locales",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "krb5-multidev",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "krb5-otp",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "krb5-pkinit",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "krb5-user",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "libgssapi-krb5-2",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "libgssrpc4",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "libk5crypto3",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "libkadm5clnt-mit11",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "libkadm5srv-mit11",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "libkdb5-9",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "libkrad0",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "libkrb5-3",
            "binary_version": "1.17-6ubuntu4.11"
          },
          {
            "binary_name": "libkrb5support0",
            "binary_version": "1.17-6ubuntu4.11"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "krb5",
        "purl": "pkg:deb/ubuntu/krb5@1.17-6ubuntu4.11?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.17-6ubuntu4.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.17-6",
        "1.17-6ubuntu3",
        "1.17-6ubuntu4",
        "1.17-6ubuntu4.1",
        "1.17-6ubuntu4.2",
        "1.17-6ubuntu4.3",
        "1.17-6ubuntu4.4",
        "1.17-6ubuntu4.6",
        "1.17-6ubuntu4.7",
        "1.17-6ubuntu4.8",
        "1.17-6ubuntu4.9"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-3576",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "krb5-admin-server",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "krb5-gss-samples",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "krb5-k5tls",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "krb5-kdc",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "krb5-kdc-ldap",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "krb5-kpropd",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "krb5-locales",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "krb5-multidev",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "krb5-otp",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "krb5-pkinit",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "krb5-user",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "libgssapi-krb5-2",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "libgssrpc4",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "libk5crypto3",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "libkadm5clnt-mit12",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "libkadm5srv-mit12",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "libkdb5-10",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "libkrad0",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "libkrb5-3",
            "binary_version": "1.19.2-2ubuntu0.7"
          },
          {
            "binary_name": "libkrb5support0",
            "binary_version": "1.19.2-2ubuntu0.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "krb5",
        "purl": "pkg:deb/ubuntu/krb5@1.19.2-2ubuntu0.7?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.19.2-2ubuntu0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.18.3-6",
        "1.18.3-7",
        "1.19.2-0ubuntu1",
        "1.19.2-1",
        "1.19.2-2",
        "1.19.2-2ubuntu0.1",
        "1.19.2-2ubuntu0.2",
        "1.19.2-2ubuntu0.3",
        "1.19.2-2ubuntu0.4",
        "1.19.2-2ubuntu0.5",
        "1.19.2-2ubuntu0.6"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-3576",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "krb5-admin-server",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "krb5-gss-samples",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "krb5-k5tls",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "krb5-kdc",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "krb5-kdc-ldap",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "krb5-kpropd",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "krb5-locales",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "krb5-multidev",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "krb5-otp",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "krb5-pkinit",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "krb5-user",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "libgssapi-krb5-2",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "libgssrpc4t64",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "libk5crypto3",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "libkadm5clnt-mit12",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "libkadm5srv-mit12",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "libkdb5-10t64",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "libkrad0",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "libkrb5-3",
            "binary_version": "1.20.1-6ubuntu2.6"
          },
          {
            "binary_name": "libkrb5support0",
            "binary_version": "1.20.1-6ubuntu2.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "krb5",
        "purl": "pkg:deb/ubuntu/krb5@1.20.1-6ubuntu2.6?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.20.1-6ubuntu2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.20.1-3ubuntu1",
        "1.20.1-5build1",
        "1.20.1-6ubuntu1",
        "1.20.1-6ubuntu2",
        "1.20.1-6ubuntu2.1",
        "1.20.1-6ubuntu2.2",
        "1.20.1-6ubuntu2.3",
        "1.20.1-6ubuntu2.4",
        "1.20.1-6ubuntu2.5"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that Kerberos allowed the usage of weak cryptographic\nstandards. An attacker could possibly use this issue to expose sensitive\ninformation.\n\nThis update introduces the allow_rc4 and allow_des3 configuration options,\nand disables the usage of RC4 and 3DES ciphers by default. Users are\nadvised to discontinue their usage and upgrade to stronger encryption\nprotocols. If the use of the insecure RC4 and 3DES algorithms is necessary,\nthey can be enabled with the aforementioned configuration options.",
  "id": "USN-7542-1",
  "modified": "2026-06-25T10:46:50Z",
  "published": "2025-05-28T14:41:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7542-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-3576"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "krb5 vulnerability",
  "upstream": [
    "UBUNTU-CVE-2025-3576"
  ]
}



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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.

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Detection rules are retrieved from Rulezet.

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