CVE-2018-5737: isc bind Reachable Assertion

Vulnerability summary

CVE-2018-5737 is a high (CVSS 7.5) Reachable Assertion vulnerability in isc bind. EPSS estimates a 10.44% chance of exploitation in the next 30 days, higher than 95.6% of scored vulnerabilities.

Timeline

1. 16-01-2019
   PublishedVulnerability first disclosed.
2. 16-09-2024
   Last modifiedVulnerability information updated.

Description

A problem with the implementation of the new serve-stale feature in BIND 9.12 can lead to an assertion failure in rbtdb.c, even when stale-answer-enable is off. Additionally, problematic interaction between the serve-stale feature and NSEC aggressive negative caching can in some cases cause undesirable behavior from named, such as a recursion loop or excessive logging. Deliberate exploitation of this condition could cause operational problems depending on the particular manifestation -- either degradation or denial of service. 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.