CVE-2018-5736: isc bind Reachable Assertion

Vulnerability summary

CVE-2018-5736 is a medium (CVSS 5.3) Reachable Assertion vulnerability in isc bind. EPSS estimates a 18.02% chance of exploitation in the next 30 days, higher than 97.1% of scored vulnerabilities.

Timeline

1. 16-01-2019
   PublishedVulnerability first disclosed.
2. 05-08-2024
   Last modifiedVulnerability information updated.

Description

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.

• CWE-617Reachable AssertionThe product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.