Skip to content

Instantly share code, notes, and snippets.

@bgeesaman
bgeesaman / CVE-2019-11253-poc.sh
Last active December 29, 2022 14:25
CVE-2019-11253 Kubernetes API Server YAML Parsing Remote Denial of Service PoC aka "Billion Laughs"
#!/usr/bin/env bash
# CVE-2019-11253
# https://github.com/kubernetes/kubernetes/issues/83253
# Shout out: @raesene for poc collab, @iancoldwater + @mauilion for
# HONKing inspiration and other guidance.
# Description: In Kubernetes 1.13 and below, the default configuration
# is that system:anonymous can request a selfsubjectaccessreview
# via mechanisms such as "kubectl auth can-i". This request can
# include POSTed YAML, and just the act of trying to parse it causes