An error in zone database reference counting can lead to an assertion failure if a server which is running an affected version of BIND attempts several transfers of a slave zone in quick succession. This defect could be deliberately exercised by an attacker who is permitted to cause a vulnerable server to initiate zone transfers (for example: by sending valid NOTIFY messages), causing the named process to exit after failing the assertion test. Affects BIND 9.12.0 and 9.12.1.
http://www.securityfocus.com/bid/104386
http://www.securitytracker.com/id/1040941
Source: MITRE
Published: 2019-01-16
Updated: 2019-10-03
Type: CWE-617
Base Score: 3.5
Vector: AV:N/AC:M/Au:S/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 6.8
Severity: LOW
Base Score: 5.3
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 1.6
Severity: MEDIUM