--- title: "CVE-2020-8625: A vulnerability in BIND's GSSAPI security… | CubePath" description: "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…" language: en source: https://cubepath.com/security/cve/CVE-2020-8625 --- # CVE-2020-8625: A vulnerability in BIND's GSSAPI security… | CubePath ## Description 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 Official description from the CVE record, published by isc. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-8625) ## Key data ### CVSS 3.1 High 8.1 Score published by isc in the CVE record. CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | High | The attack depends on conditions outside the attacker's control, so it takes preparation. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.64161 (64.2% probability) Percentile 99.2% Scores of Nov 10, 2026 Model v2026.06.15 ## Affected products Products listed in the CVE record, as the CNA published them. - 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 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [kb.isc.org/v1/docs/cve-2020-8625](https://kb.isc.org/v1/docs/cve-2020-8625) - [DSA-4857](https://www.debian.org/security/2021/dsa-4857) (debian.org) vendor-advisory - [\[oss-security\] 20210218 BIND Operational Notification: Enabling the new BIND option "stale-answer-client-timeout" can result in unexpected server termination](http://www.openwall.com/lists/oss-security/2021/02/19/1) (openwall.com) mailing-list - [\[debian-lts-announce\] 20210219 \[SECURITY\] \[DLA 2568-1\] bind9 security update](https://lists.debian.org/debian-lts-announce/2021/02/msg00029.html) (lists.debian.org) mailing-list - [\[oss-security\] 20210220 BIND Operational Notification: Zone journal (.jnl) file incompatibility,after upgrading to BIND 9.16.12 and 9.17](http://www.openwall.com/lists/oss-security/2021/02/20/2) (openwall.com) mailing-list - [zerodayinitiative.com/advisories/ZDI-21-195](https://www.zerodayinitiative.com/advisories/ZDI-21-195/) - [FEDORA-2021-0595625865](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QWCMBOSZOJIIET7BWTRYS3HLX5TSDKHX/) (lists.fedoraproject.org) vendor-advisory - [FEDORA-2021-28f97e232d](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KYXAF7G45RXDVNUTWWCI2CVTHRZ67LST/) (lists.fedoraproject.org) vendor-advisory - [security.netapp.com/advisory/ntap-20210319-0001](https://security.netapp.com/advisory/ntap-20210319-0001/) - [FEDORA-2021-8b4744f152](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EBTPWRQWRQEJNWY4NHO4WLS4KLJ3ERHZ/) (lists.fedoraproject.org) vendor-advisory - [cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf](https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf) ## Timeline 1. ID reserved Feb 5, 2020 2. Record published Feb 17, 2021 3. Record last updated Sep 16, 2024 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:02 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)