CVE-2020-8843: Input Validation
First published: Fri Feb 14 2020(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Istio Istio | >=1.3.0<=1.3.6 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2020-8843?
The severity of CVE-2020-8843 is high.
How does CVE-2020-8843 affect Istio?
CVE-2020-8843 affects Istio versions 1.3 through 1.3.6.
What is the vulnerability description of CVE-2020-8843?
CVE-2020-8843 is a vulnerability in Istio where it is possible to bypass a specifically configured Mixer policy under certain circumstances.
How can CVE-2020-8843 be exploited?
CVE-2020-8843 can be exploited by using the x-istio-attributes header at ingress to affect policy decisions when Mixer policy selectively applies to a source.
How can CVE-2020-8843 be fixed?
To fix CVE-2020-8843, upgrade Istio to a version beyond 1.3.6.
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- agent/first-publish-date
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- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/weakness
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- agent/tags
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- collector/mitre-cve
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- vendor/istio
- canonical/istio istio
- version/istio istio/1.3.0
- version/istio istio/1.3.6