cve/2018/CVE-2018-5737.md

### [CVE-2018-5737](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5737)
![](https://img.shields.io/static/v1?label=Product&message=BIND%209&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Servers%20running%20a%20vulnerable%20version%20of%20BIND%20(9.12.0%2C%209.12.1)%20which%20permit%20recursion%20to%20clients%20and%20which%20have%20the%20max-stale-ttl%20parameter%20set%20to%20a%20non-zero%20value%20are%20at%20risk.&color=brighgreen)

### 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.

### POC

#### Reference
- https://kb.isc.org/docs/aa-01606

#### Github
- https://github.com/HJXSaber/bind9-my