Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Istio | Istio | >= 1.3.0, <= 1.3.6 |
Related Weaknesses (CWE)
References
- https://github.com/istio/istio/commits/masterPatch
- https://istio.io/news/security/Vendor Advisory
- https://istio.io/news/security/istio-security-2020-002/Vendor Advisory
- https://github.com/istio/istio/commits/masterPatch
- https://istio.io/news/security/Vendor Advisory
- https://istio.io/news/security/istio-security-2020-002/Vendor Advisory
FAQ
What is CVE-2020-8843?
CVE-2020-8843 is a vulnerability with a CVSS score of 7.4 (HIGH). 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 i...
How severe is CVE-2020-8843?
CVE-2020-8843 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-8843?
Check the references section above for vendor advisories and patch information. Affected products include: Istio Istio.