cve/2020/CVE-2020-8843.md

CVE-2020-8843

Description

An issue was discovered in Istio 1.3 through 1.3.6. Under certain circumstances, it is possible to bypass a specifically configured Mixer policy. Istio-proxy accepts the x-istio-attributes header at ingress that can be used to affect policy decisions when Mixer policy selectively applies to a source equal to ingress. To exploit this vulnerability, someone has to encode a source.uid in this header. This feature is disabled by default in Istio 1.3 and 1.4.

POC

Reference

• https://github.com/istio/istio/commits/master
• https://github.com/istio/istio/commits/master

Github

No PoCs found on GitHub currently.