CVE-2020-8625: Debian Linux

High severity, CVSS 8.1. EPSS: 64.2% chance of exploitation in the next 30 days.

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

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• Fedoraproject Fedora: version 32 only; version 33 only; version 34 only
• ISC BIND: from 9.5.0, up to and including 9.11.27; from 9.12.0, up to and including 9.16.11; version 9.11.3 only; version 9.11.5 only; version 9.11.6 only; version 9.11.7 only; …
• Netapp 500f Firmware: affected versions not specified
• Netapp a250 Firmware: affected versions not specified
• Netapp Cloud Backup: affected versions not specified
• Siemens Sinec Infrastructure Network Services: before 1.0.1.1 (fixed in 1.0.1.1)

Published 2021-02-17. Last modified 2026-06-17.