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CVE-2020-8625

HIGH8.1
High EPSS
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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

CVSS breakdown

CVSS 3.1
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Affected products

  • ISC / BIND9Open Source Branches 9.5 though 9.11 9.5.0 through versions before 9.11.28 – Open Source Branches 9.5 though 9.11 9.5.0 through versions before 9.11.28
  • ISC / BIND9Open Source Branches 9.12 though 9.16 9.12.0 through versions before 9.16.12 – Open Source Branches 9.12 though 9.16 9.12.0 through versions before 9.16.12
  • ISC / BIND9Supported Preview Branch 9.11-S 9.11.3-S1 through versions before 9.11.28-S1 – Supported Preview Branch 9.11-S 9.11.3-S1 through versions before 9.11.28-S1
  • ISC / BIND9Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.12-S1 – Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.12-S1
  • ISC / BIND9Development Branch 9.17 9.17.0 through versions before 9.17.2 – Development Branch 9.17 9.17.0 through versions before 9.17.2

References