Vulnerability-Lookup

OESA-2021-1041 (CVE-2020-8625)

Vulnerability from osv_openeuler – Published: 2021-03-05 11:04 – Updated: 2026-08-06 11:04 – Source website

Summary

bind security update

Details

Berkeley Internet Name Domain (BIND) is an implementation of the Domain Name System (DNS) protocols and provides an openly redistributable reference implementation of the major components of the Domain Name System. This package includes the components to operate a DNS server.

Security Fix(es):

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(CVE-2020-8625)

Severity

8.1 (High)


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

References

URL

Type

	https://openeuler.org/en/security/safety-bulletin…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-8625	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "bind-debugsource-9.11.21-5.oe1.aarch64.rpm",
          "bind-9.11.21-5.oe1.aarch64.rpm",
          "bind-devel-9.11.21-5.oe1.aarch64.rpm",
          "bind-pkcs11-devel-9.11.21-5.oe1.aarch64.rpm",
          "bind-debuginfo-9.11.21-5.oe1.aarch64.rpm",
          "bind-chroot-9.11.21-5.oe1.aarch64.rpm",
          "bind-utils-9.11.21-5.oe1.aarch64.rpm",
          "bind-libs-lite-9.11.21-5.oe1.aarch64.rpm",
          "bind-export-libs-9.11.21-5.oe1.aarch64.rpm",
          "bind-pkcs11-9.11.21-5.oe1.aarch64.rpm",
          "bind-sdb-chroot-9.11.21-5.oe1.aarch64.rpm",
          "bind-export-devel-9.11.21-5.oe1.aarch64.rpm",
          "bind-libs-9.11.21-5.oe1.aarch64.rpm",
          "bind-sdb-9.11.21-5.oe1.aarch64.rpm",
          "bind-libs-9.11.21-4.oe1.aarch64.rpm",
          "bind-utils-9.11.21-4.oe1.aarch64.rpm",
          "bind-debugsource-9.11.21-4.oe1.aarch64.rpm",
          "bind-chroot-9.11.21-4.oe1.aarch64.rpm",
          "bind-debuginfo-9.11.21-4.oe1.aarch64.rpm",
          "bind-sdb-9.11.21-4.oe1.aarch64.rpm",
          "bind-pkcs11-9.11.21-4.oe1.aarch64.rpm",
          "bind-sdb-chroot-9.11.21-4.oe1.aarch64.rpm",
          "bind-export-libs-9.11.21-4.oe1.aarch64.rpm",
          "bind-devel-9.11.21-4.oe1.aarch64.rpm",
          "bind-9.11.21-4.oe1.aarch64.rpm",
          "bind-export-devel-9.11.21-4.oe1.aarch64.rpm",
          "bind-pkcs11-devel-9.11.21-4.oe1.aarch64.rpm",
          "bind-libs-lite-9.11.21-4.oe1.aarch64.rpm"
        ],
        "noarch": [
          "python3-bind-9.11.21-5.oe1.noarch.rpm",
          "python3-bind-9.11.21-4.oe1.noarch.rpm"
        ],
        "src": [
          "bind-9.11.21-5.oe1.src.rpm",
          "bind-9.11.21-4.oe1.src.rpm"
        ],
        "x86_64": [
          "bind-sdb-chroot-9.11.21-5.oe1.x86_64.rpm",
          "bind-libs-9.11.21-5.oe1.x86_64.rpm",
          "bind-chroot-9.11.21-5.oe1.x86_64.rpm",
          "bind-devel-9.11.21-5.oe1.x86_64.rpm",
          "bind-export-devel-9.11.21-5.oe1.x86_64.rpm",
          "bind-9.11.21-5.oe1.x86_64.rpm",
          "bind-debugsource-9.11.21-5.oe1.x86_64.rpm",
          "bind-pkcs11-devel-9.11.21-5.oe1.x86_64.rpm",
          "bind-libs-lite-9.11.21-5.oe1.x86_64.rpm",
          "bind-utils-9.11.21-5.oe1.x86_64.rpm",
          "bind-sdb-9.11.21-5.oe1.x86_64.rpm",
          "bind-debuginfo-9.11.21-5.oe1.x86_64.rpm",
          "bind-export-libs-9.11.21-5.oe1.x86_64.rpm",
          "bind-pkcs11-9.11.21-5.oe1.x86_64.rpm",
          "bind-sdb-9.11.21-4.oe1.x86_64.rpm",
          "bind-devel-9.11.21-4.oe1.x86_64.rpm",
          "bind-pkcs11-devel-9.11.21-4.oe1.x86_64.rpm",
          "bind-libs-lite-9.11.21-4.oe1.x86_64.rpm",
          "bind-debugsource-9.11.21-4.oe1.x86_64.rpm",
          "bind-9.11.21-4.oe1.x86_64.rpm",
          "bind-debuginfo-9.11.21-4.oe1.x86_64.rpm",
          "bind-libs-9.11.21-4.oe1.x86_64.rpm",
          "bind-chroot-9.11.21-4.oe1.x86_64.rpm",
          "bind-pkcs11-9.11.21-4.oe1.x86_64.rpm",
          "bind-sdb-chroot-9.11.21-4.oe1.x86_64.rpm",
          "bind-export-libs-9.11.21-4.oe1.x86_64.rpm",
          "bind-utils-9.11.21-4.oe1.x86_64.rpm",
          "bind-export-devel-9.11.21-4.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS",
        "name": "bind",
        "purl": "pkg:rpm/openEuler/bind\u0026distro=openEuler-20.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.11.21-4.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "bind-libs-9.11.21-4.oe1.aarch64.rpm",
          "bind-utils-9.11.21-4.oe1.aarch64.rpm",
          "bind-debugsource-9.11.21-4.oe1.aarch64.rpm",
          "bind-chroot-9.11.21-4.oe1.aarch64.rpm",
          "bind-debuginfo-9.11.21-4.oe1.aarch64.rpm",
          "bind-sdb-9.11.21-4.oe1.aarch64.rpm",
          "bind-pkcs11-9.11.21-4.oe1.aarch64.rpm",
          "bind-sdb-chroot-9.11.21-4.oe1.aarch64.rpm",
          "bind-export-libs-9.11.21-4.oe1.aarch64.rpm",
          "bind-devel-9.11.21-4.oe1.aarch64.rpm",
          "bind-9.11.21-4.oe1.aarch64.rpm",
          "bind-export-devel-9.11.21-4.oe1.aarch64.rpm",
          "bind-pkcs11-devel-9.11.21-4.oe1.aarch64.rpm",
          "bind-libs-lite-9.11.21-4.oe1.aarch64.rpm"
        ],
        "noarch": [
          "python3-bind-9.11.21-4.oe1.noarch.rpm"
        ],
        "src": [
          "bind-9.11.21-4.oe1.src.rpm"
        ],
        "x86_64": [
          "bind-sdb-9.11.21-4.oe1.x86_64.rpm",
          "bind-devel-9.11.21-4.oe1.x86_64.rpm",
          "bind-pkcs11-devel-9.11.21-4.oe1.x86_64.rpm",
          "bind-libs-lite-9.11.21-4.oe1.x86_64.rpm",
          "bind-debugsource-9.11.21-4.oe1.x86_64.rpm",
          "bind-9.11.21-4.oe1.x86_64.rpm",
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          "bind-libs-9.11.21-4.oe1.x86_64.rpm",
          "bind-chroot-9.11.21-4.oe1.x86_64.rpm",
          "bind-pkcs11-9.11.21-4.oe1.x86_64.rpm",
          "bind-sdb-chroot-9.11.21-4.oe1.x86_64.rpm",
          "bind-export-libs-9.11.21-4.oe1.x86_64.rpm",
          "bind-utils-9.11.21-4.oe1.x86_64.rpm",
          "bind-export-devel-9.11.21-4.oe1.x86_64.rpm"
        ]
      },
      "package": {
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        "name": "bind",
        "purl": "pkg:rpm/openEuler/bind\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "Berkeley Internet Name Domain (BIND) is an implementation of the Domain Name System (DNS) protocols and provides an openly redistributable reference implementation of the major components of the Domain Name System. This package includes the components to operate a DNS server.\r\n\r\nSecurity Fix(es):\r\n\r\nBIND 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(CVE-2020-8625)",
  "id": "OESA-2021-1041",
  "modified": "2026-08-06T11:04:16Z",
  "published": "2021-03-05T11:04:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1041"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-8625"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "bind security update",
  "upstream": [
    "CVE-2020-8625"
  ]
}

CVE-2020-8625 (GCVE-0-2020-8625)

Vulnerability from cvelistv5 – Published: 2021-02-17 22:40 – Updated: 2024-09-16 22:40

Title

A vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attack

Summary

Severity

8.1 (High)


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

CWE

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:GSS-TSIG is an extension to the TSIG protocol which is intended to support the secure exchange of keys for use in verifying the authenticity of communications between parties on a network. SPNEGO is a negotiation mechanism used by GSSAPI, the application protocol interface for GSS-TSIG. The SPNEGO implementation used by BIND has been found to be vulnerable to a buffer overflow attack.

Assigner

isc mitre root

References

11 references

URL	Tags
https://kb.isc.org/v1/docs/cve-2020-8625	x_refsource_CONFIRM
https://www.debian.org/security/2021/dsa-4857	vendor-advisoryx_refsource_DEBIAN
http://www.openwall.com/lists/oss-security/2021/02/19/1	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/02/20/2	mailing-listx_refsource_MLIST
https://www.zerodayinitiative.com/advisories/ZDI-…	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://security.netapp.com/advisory/ntap-2021031…	x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
ISC	BIND9	Affected: Open Source Branches 9.5 though 9.11 9.5.0 through versions before 9.11.28 Affected: Open Source Branches 9.12 though 9.16 9.12.0 through versions before 9.16.12 Affected: Supported Preview Branch 9.11-S 9.11.3-S1 through versions before 9.11.28-S1 Affected: Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.12-S1 Affected: Development Branch 9.17 9.17.0 through versions before 9.17.2

Date Public

2021-02-17 00:00

Credits

ISC would like to thank an anonymous party, working in conjunction with Trend Micro Zero Day Initiative, for reporting this issue to us.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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        "providerMetadata": {
          "dateUpdated": "2024-08-04T10:03:46.290Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            "url": "https://kb.isc.org/v1/docs/cve-2020-8625"
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          {
            "name": "[oss-security] 20210218 BIND Operational Notification: Enabling the new BIND option \"stale-answer-client-timeout\" can result in unexpected server termination",
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            "tags": [
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          {
            "name": "FEDORA-2021-28f97e232d",
            "tags": [
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            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KYXAF7G45RXDVNUTWWCI2CVTHRZ67LST/"
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            "url": "https://security.netapp.com/advisory/ntap-20210319-0001/"
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            "tags": [
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            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EBTPWRQWRQEJNWY4NHO4WLS4KLJ3ERHZ/"
          },
          {
            "tags": [
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            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
          }
        ],
        "title": "CVE Program Container"
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    ],
    "cna": {
      "affected": [
        {
          "product": "BIND9",
          "vendor": "ISC",
          "versions": [
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            },
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          "lang": "en",
          "value": "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"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "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:GSS-TSIG is an extension to the TSIG protocol which is intended to support the secure exchange of keys for use in verifying the authenticity of communications between parties on a network.  SPNEGO is a negotiation mechanism used by GSSAPI, the application protocol interface for GSS-TSIG.  The SPNEGO implementation used by BIND has been found to be vulnerable to a buffer overflow attack.",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-03-08T14:07:11.000Z",
        "orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
        "shortName": "isc"
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          "tags": [
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          "url": "https://kb.isc.org/v1/docs/cve-2020-8625"
        },
        {
          "name": "DSA-4857",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2021/dsa-4857"
        },
        {
          "name": "[oss-security] 20210218 BIND Operational Notification: Enabling the new BIND option \"stale-answer-client-timeout\" can result in unexpected server termination",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
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          "url": "http://www.openwall.com/lists/oss-security/2021/02/19/1"
        },
        {
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          "url": "https://lists.debian.org/debian-lts-announce/2021/02/msg00029.html"
        },
        {
          "name": "[oss-security] 20210220 BIND Operational Notification: Zone journal (.jnl) file incompatibility,after upgrading to BIND 9.16.12 and 9.17",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
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          "url": "http://www.openwall.com/lists/oss-security/2021/02/20/2"
        },
        {
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        },
        {
          "name": "FEDORA-2021-0595625865",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QWCMBOSZOJIIET7BWTRYS3HLX5TSDKHX/"
        },
        {
          "name": "FEDORA-2021-28f97e232d",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KYXAF7G45RXDVNUTWWCI2CVTHRZ67LST/"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20210319-0001/"
        },
        {
          "name": "FEDORA-2021-8b4744f152",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EBTPWRQWRQEJNWY4NHO4WLS4KLJ3ERHZ/"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to the patched release most closely related to your current version of BIND:\n\n    BIND 9.11.28\n    BIND 9.16.12\n\nBIND Supported Preview Edition is a special feature-preview branch of BIND provided to eligible ISC support customers.\n\n    BIND 9.11.28-S1\n    BIND 9.16.12-S1\n\nAcknowledgments: ISC would like to thank an anonymous party, working in conjunction with Trend Micro Zero Day Initiative, for reporting this issue to us."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "A vulnerability in BIND\u0027s GSSAPI security policy negotiation can be targeted by a buffer overflow attack",
      "workarounds": [
        {
          "lang": "en",
          "value": "This vulnerability only affects servers configured to use GSS-TSIG, most often to sign dynamic updates. If another mechanism can be used to authenticate updates, the vulnerability can be avoided by choosing not to enable the use of GSS-TSIG features.\n\nOn some platforms it may be possible to build a working BIND installation that is not vulnerable to CVE-2020-8625 by providing the --disable-isc-spnego command-line argument when running the ./configure script in the top level of the BIND source directory, before compiling and linking named.\n\nChoosing to configure and build BIND without the ISC SPNEGO implementation does not produce a vulnerable BIND on any platform, but on platforms where GSSAPI support in the system is lacking, building without the ISC SPNEGO implementation may result in unusable GSSAPI features (such as an inability to use GSS-TSIG-signed DDNS updates)."
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security-officer@isc.org",
          "DATE_PUBLIC": "2021-02-17T20:01:13.000Z",
          "ID": "CVE-2020-8625",
          "STATE": "PUBLIC",
          "TITLE": "A vulnerability in BIND\u0027s GSSAPI security policy negotiation can be targeted by a buffer overflow attack"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "BIND9",
                      "version": {
                        "version_data": [
                          {
                            "version_name": "Open Source Branches 9.5 though 9.11",
                            "version_value": "9.5.0 through versions before 9.11.28"
                          },
                          {
                            "version_name": "Open Source Branches 9.12 though 9.16",
                            "version_value": "9.12.0 through versions before 9.16.12"
                          },
                          {
                            "version_name": "Supported Preview Branch 9.11-S",
                            "version_value": "9.11.3-S1 through versions before 9.11.28-S1"
                          },
                          {
                            "version_name": "Supported Preview Branch 9.16-S",
                            "version_value": "9.16.8-S1 through versions before 9.16.12-S1"
                          },
                          {
                            "version_name": "Development Branch 9.17",
                            "version_value": "9.17.0 through versions before 9.17.2"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "ISC"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "ISC would like to thank an anonymous party, working in conjunction with Trend Micro Zero Day Initiative, for reporting this issue to us."
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "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"
            }
          ]
        },
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        "impact": {
          "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        },
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              "description": [
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                  "lang": "eng",
                  "value": "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:GSS-TSIG is an extension to the TSIG protocol which is intended to support the secure exchange of keys for use in verifying the authenticity of communications between parties on a network.  SPNEGO is a negotiation mechanism used by GSSAPI, the application protocol interface for GSS-TSIG.  The SPNEGO implementation used by BIND has been found to be vulnerable to a buffer overflow attack."
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://kb.isc.org/v1/docs/cve-2020-8625",
              "refsource": "CONFIRM",
              "url": "https://kb.isc.org/v1/docs/cve-2020-8625"
            },
            {
              "name": "DSA-4857",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2021/dsa-4857"
            },
            {
              "name": "[oss-security] 20210218 BIND Operational Notification: Enabling the new BIND option \"stale-answer-client-timeout\" can result in unexpected server termination",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/02/19/1"
            },
            {
              "name": "[debian-lts-announce] 20210219 [SECURITY] [DLA 2568-1] bind9 security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2021/02/msg00029.html"
            },
            {
              "name": "[oss-security] 20210220 BIND Operational Notification: Zone journal (.jnl) file incompatibility,after upgrading to BIND 9.16.12 and 9.17",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/02/20/2"
            },
            {
              "name": "https://www.zerodayinitiative.com/advisories/ZDI-21-195/",
              "refsource": "MISC",
              "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-195/"
            },
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            {
              "name": "FEDORA-2021-28f97e232d",
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              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KYXAF7G45RXDVNUTWWCI2CVTHRZ67LST/"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20210319-0001/",
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              "url": "https://security.netapp.com/advisory/ntap-20210319-0001/"
            },
            {
              "name": "FEDORA-2021-8b4744f152",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EBTPWRQWRQEJNWY4NHO4WLS4KLJ3ERHZ/"
            },
            {
              "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf",
              "refsource": "CONFIRM",
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
            }
          ]
        },
        "solution": [
          {
            "lang": "en",
            "value": "Upgrade to the patched release most closely related to your current version of BIND:\n\n    BIND 9.11.28\n    BIND 9.16.12\n\nBIND Supported Preview Edition is a special feature-preview branch of BIND provided to eligible ISC support customers.\n\n    BIND 9.11.28-S1\n    BIND 9.16.12-S1\n\nAcknowledgments: ISC would like to thank an anonymous party, working in conjunction with Trend Micro Zero Day Initiative, for reporting this issue to us."
          }
        ],
        "source": {
          "discovery": "EXTERNAL"
        },
        "work_around": [
          {
            "lang": "en",
            "value": "This vulnerability only affects servers configured to use GSS-TSIG, most often to sign dynamic updates. If another mechanism can be used to authenticate updates, the vulnerability can be avoided by choosing not to enable the use of GSS-TSIG features.\n\nOn some platforms it may be possible to build a working BIND installation that is not vulnerable to CVE-2020-8625 by providing the --disable-isc-spnego command-line argument when running the ./configure script in the top level of the BIND source directory, before compiling and linking named.\n\nChoosing to configure and build BIND without the ISC SPNEGO implementation does not produce a vulnerable BIND on any platform, but on platforms where GSSAPI support in the system is lacking, building without the ISC SPNEGO implementation may result in unusable GSSAPI features (such as an inability to use GSS-TSIG-signed DDNS updates)."
          }
        ]
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
    "assignerShortName": "isc",
    "cveId": "CVE-2020-8625",
    "datePublished": "2021-02-17T22:40:16.090Z",
    "dateReserved": "2020-02-05T00:00:00.000Z",
    "dateUpdated": "2024-09-16T22:40:02.277Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OESA-2021-1041 (CVE-2020-8625)

CVE-2020-8625 (GCVE-0-2020-8625)

Tags

Sightings

Nomenclature

Related by attack behaviour