cve/2023/CVE-2023-50387.md

### [CVE-2023-50387](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-50387)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records.

### POC

#### Reference
- https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/

#### Github
- https://github.com/GitHubForSnap/knot-resolver-gael
- https://github.com/GrigGM/05-virt-04-docker-hw
- https://github.com/fkie-cad/nvd-json-data-feeds
- https://github.com/fokypoky/places-list
- https://github.com/giterlizzi/secdb-feeds
- https://github.com/hackingyseguridad/dnssec
- https://github.com/knqyf263/CVE-2023-50387
- https://github.com/marklogic/marklogic-docker
- https://github.com/nomi-sec/PoC-in-GitHub