Vulnerability Details CVE-2020-8843
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 58.1%
CVSS Severity
CVSS v3 Score 7.4
CVSS v2 Score 5.8
References
Products affected by CVE-2020-8843
-
cpe:2.3:a:istio:istio:1.3.0
-
cpe:2.3:a:istio:istio:1.3.1
-
cpe:2.3:a:istio:istio:1.3.2
-
cpe:2.3:a:istio:istio:1.3.3
-
cpe:2.3:a:istio:istio:1.3.4
-
cpe:2.3:a:istio:istio:1.3.5
-
cpe:2.3:a:istio:istio:1.3.6