ubuntu-cve-2020-8625
Vulnerability from osv_ubuntu
Published
2021-02-17 00:00
Modified
2026-04-22 07:39
Summary
Details

BIND servers are vulnerable if they are running an affected version and are configured to use GSS-TSIG features. In a configuration which uses BIND's default settings the vulnerable code path is not exposed, but a server can be rendered vulnerable by explicitly setting valid values for the tkey-gssapi-keytab or tkey-gssapi-credentialconfiguration options. Although the default configuration is not vulnerable, GSS-TSIG is frequently used in networks where BIND is integrated with Samba, as well as in mixed-server environments that combine BIND servers with Active Directory domain controllers. The most likely outcome of a successful exploitation of the vulnerability is a crash of the named process. However, remote code execution, while unproven, is theoretically possible. Affects: BIND 9.5.0 -> 9.11.27, 9.12.0 -> 9.16.11, and versions BIND 9.11.3-S1 -> 9.11.27-S1 and 9.16.8-S1 -> 9.16.11-S1 of BIND Supported Preview Edition. Also release versions 9.17.0 -> 9.17.1 of the BIND 9.17 development branch

Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.9.5.dfsg-3ubuntu0.19+esm4"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.9.5.dfsg-3ubuntu0.19+esm4"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.9.5.dfsg-3ubuntu0.19+esm4"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.9.5.dfsg-3ubuntu0.19+esm4"
          },
          {
            "binary_name": "host",
            "binary_version": "1:9.9.5.dfsg-3ubuntu0.19+esm4"
          },
          {
            "binary_name": "libbind9-90",
            "binary_version": "1:9.9.5.dfsg-3ubuntu0.19+esm4"
          },
          {
            "binary_name": "libdns100",
            "binary_version": "1:9.9.5.dfsg-3ubuntu0.19+esm4"
          },
          {
            "binary_name": "libisc95",
            "binary_version": "1:9.9.5.dfsg-3ubuntu0.19+esm4"
          },
          {
            "binary_name": "libisccc90",
            "binary_version": "1:9.9.5.dfsg-3ubuntu0.19+esm4"
          },
          {
            "binary_name": "libisccfg90",
            "binary_version": "1:9.9.5.dfsg-3ubuntu0.19+esm4"
          },
          {
            "binary_name": "liblwres90",
            "binary_version": "1:9.9.5.dfsg-3ubuntu0.19+esm4"
          },
          {
            "binary_name": "lwresd",
            "binary_version": "1:9.9.5.dfsg-3ubuntu0.19+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.9.5.dfsg-3ubuntu0.19+esm4?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.9.5.dfsg-3ubuntu0.19+esm4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.9.3.dfsg.P2-4ubuntu1",
        "1:9.9.3.dfsg.P2-4ubuntu2",
        "1:9.9.3.dfsg.P2-4ubuntu3",
        "1:9.9.5.dfsg-2",
        "1:9.9.5.dfsg-3",
        "1:9.9.5.dfsg-3ubuntu0.1",
        "1:9.9.5.dfsg-3ubuntu0.2",
        "1:9.9.5.dfsg-3ubuntu0.3",
        "1:9.9.5.dfsg-3ubuntu0.4",
        "1:9.9.5.dfsg-3ubuntu0.5",
        "1:9.9.5.dfsg-3ubuntu0.6",
        "1:9.9.5.dfsg-3ubuntu0.7",
        "1:9.9.5.dfsg-3ubuntu0.8",
        "1:9.9.5.dfsg-3ubuntu0.9",
        "1:9.9.5.dfsg-3ubuntu0.10",
        "1:9.9.5.dfsg-3ubuntu0.11",
        "1:9.9.5.dfsg-3ubuntu0.12",
        "1:9.9.5.dfsg-3ubuntu0.13",
        "1:9.9.5.dfsg-3ubuntu0.14",
        "1:9.9.5.dfsg-3ubuntu0.15",
        "1:9.9.5.dfsg-3ubuntu0.16",
        "1:9.9.5.dfsg-3ubuntu0.17",
        "1:9.9.5.dfsg-3ubuntu0.18",
        "1:9.9.5.dfsg-3ubuntu0.19",
        "1:9.9.5.dfsg-3ubuntu0.19+esm1",
        "1:9.9.5.dfsg-3ubuntu0.19+esm2",
        "1:9.9.5.dfsg-3ubuntu0.19+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "host",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "libbind9-140",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "libdns-export162",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "libdns162",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "libirs-export141",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "libirs141",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "libisc-export160",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "libisc160",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "libisccc-export140",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "libisccc140",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "libisccfg-export140",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "libisccfg140",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "liblwres141",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          },
          {
            "binary_name": "lwresd",
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.18"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.10.3.dfsg.P4-8ubuntu1.18?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.10.3.dfsg.P4-8ubuntu1.18"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.9.5.dfsg-11ubuntu1",
        "1:9.9.5.dfsg-12",
        "1:9.9.5.dfsg-12.1",
        "1:9.9.5.dfsg-12.1ubuntu1",
        "1:9.10.3.dfsg.P2-4",
        "1:9.10.3.dfsg.P2-5",
        "1:9.10.3.dfsg.P4-3",
        "1:9.10.3.dfsg.P4-4",
        "1:9.10.3.dfsg.P4-5",
        "1:9.10.3.dfsg.P4-8",
        "1:9.10.3.dfsg.P4-8ubuntu1",
        "1:9.10.3.dfsg.P4-8ubuntu1.1",
        "1:9.10.3.dfsg.P4-8ubuntu1.2",
        "1:9.10.3.dfsg.P4-8ubuntu1.3",
        "1:9.10.3.dfsg.P4-8ubuntu1.4",
        "1:9.10.3.dfsg.P4-8ubuntu1.5",
        "1:9.10.3.dfsg.P4-8ubuntu1.6",
        "1:9.10.3.dfsg.P4-8ubuntu1.7",
        "1:9.10.3.dfsg.P4-8ubuntu1.8",
        "1:9.10.3.dfsg.P4-8ubuntu1.9",
        "1:9.10.3.dfsg.P4-8ubuntu1.10",
        "1:9.10.3.dfsg.P4-8ubuntu1.11",
        "1:9.10.3.dfsg.P4-8ubuntu1.12",
        "1:9.10.3.dfsg.P4-8ubuntu1.14",
        "1:9.10.3.dfsg.P4-8ubuntu1.15",
        "1:9.10.3.dfsg.P4-8ubuntu1.16",
        "1:9.10.3.dfsg.P4-8ubuntu1.17"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          },
          {
            "binary_name": "libbind9-160",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          },
          {
            "binary_name": "libdns-export1100",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          },
          {
            "binary_name": "libdns1100",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          },
          {
            "binary_name": "libirs-export160",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          },
          {
            "binary_name": "libirs160",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          },
          {
            "binary_name": "libisc-export169",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          },
          {
            "binary_name": "libisc169",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          },
          {
            "binary_name": "libisccc-export160",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          },
          {
            "binary_name": "libisccc160",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          },
          {
            "binary_name": "libisccfg-export160",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          },
          {
            "binary_name": "libisccfg160",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          },
          {
            "binary_name": "liblwres160",
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.14"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.11.3+dfsg-1ubuntu1.14?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.11.3+dfsg-1ubuntu1.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.10.3.dfsg.P4-12.6ubuntu1",
        "1:9.11.2.P1-1ubuntu2",
        "1:9.11.2.P1-1ubuntu3",
        "1:9.11.2.P1-1ubuntu4",
        "1:9.11.2.P1-1ubuntu5",
        "1:9.11.3+dfsg-1ubuntu1",
        "1:9.11.3+dfsg-1ubuntu1.1",
        "1:9.11.3+dfsg-1ubuntu1.2",
        "1:9.11.3+dfsg-1ubuntu1.3",
        "1:9.11.3+dfsg-1ubuntu1.5",
        "1:9.11.3+dfsg-1ubuntu1.7",
        "1:9.11.3+dfsg-1ubuntu1.8",
        "1:9.11.3+dfsg-1ubuntu1.9",
        "1:9.11.3+dfsg-1ubuntu1.10",
        "1:9.11.3+dfsg-1ubuntu1.11",
        "1:9.11.3+dfsg-1ubuntu1.12",
        "1:9.11.3+dfsg-1ubuntu1.13"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.16.1-0ubuntu2.6"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.16.1-0ubuntu2.6"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.16.1-0ubuntu2.6"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.16.1-0ubuntu2.6"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.16.1-0ubuntu2.6"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.16.1-0ubuntu2.6"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.16.1-0ubuntu2.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.16.1-0ubuntu2.6?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.16.1-0ubuntu2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.11.5.P4+dfsg-5.1ubuntu2",
        "1:9.11.5.P4+dfsg-5.1ubuntu3",
        "1:9.11.5.P4+dfsg-5.1ubuntu4",
        "1:9.11.5.P4+dfsg-5.1ubuntu5",
        "1:9.11.14+dfsg-1ubuntu1",
        "1:9.11.14+dfsg-3ubuntu1",
        "1:9.16.0-1ubuntu3",
        "1:9.16.0-1ubuntu4",
        "1:9.16.0-1ubuntu5",
        "1:9.16.1-0ubuntu1",
        "1:9.16.1-0ubuntu2",
        "1:9.16.1-0ubuntu2.1",
        "1:9.16.1-0ubuntu2.2",
        "1:9.16.1-0ubuntu2.3",
        "1:9.16.1-0ubuntu2.4"
      ]
    }
  ],
  "aliases": [],
  "details": "BIND servers are vulnerable if they are running an affected version and are configured to use GSS-TSIG features. In a configuration which uses BIND\u0027s default settings the vulnerable code path is not exposed, but a server can be rendered vulnerable by explicitly setting valid values for the tkey-gssapi-keytab or tkey-gssapi-credentialconfiguration options. Although the default configuration is not vulnerable, GSS-TSIG is frequently used in networks where BIND is integrated with Samba, as well as in mixed-server environments that combine BIND servers with Active Directory domain controllers. The most likely outcome of a successful exploitation of the vulnerability is a crash of the named process. However, remote code execution, while unproven, is theoretically possible. Affects: BIND 9.5.0 -\u003e 9.11.27, 9.12.0 -\u003e 9.16.11, and versions BIND 9.11.3-S1 -\u003e 9.11.27-S1 and 9.16.8-S1 -\u003e 9.16.11-S1 of BIND Supported Preview Edition. Also release versions 9.17.0 -\u003e 9.17.1 of the BIND 9.17 development branch",
  "id": "UBUNTU-CVE-2020-8625",
  "modified": "2026-04-22T07:39:19Z",
  "published": "2021-02-17T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-8625"
    },
    {
      "type": "REPORT",
      "url": "https://kb.isc.org/docs/cve-2020-8625"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4737-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4737-2"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-8625"
    }
  ],
  "related": [
    "USN-4737-1",
    "USN-4737-2"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-8625"
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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