CVE-2020-8595
First published: Tue Feb 04 2020(Updated: )
Istio versions 1.2.10 (End of Life) and prior, 1.3 through 1.3.7, and 1.4 through 1.4.3 allows authentication bypass. The Authentication Policy exact-path matching logic can allow unauthorized access to HTTP paths even if they are configured to be only accessed after presenting a valid JWT token. For example, an attacker can add a ? or # character to a URI that would otherwise satisfy an exact-path match.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/istio | <1.3.8 | 1.3.8 |
| redhat/istio | <1.4.4 | 1.4.4 |
| Istio Istio | >=1.3<=1.3.7 | |
| Istio Istio | >=1.4.0<=1.4.3 | |
| Redhat Openshift Service Mesh | =1.0 | |
| Redhat Enterprise Linux | =8.0 |
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Reference Links
- https://access.redhat.com/errata/RHSA-2020:0477
- https://access.redhat.com/security/cve/cve-2020-8595
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595
- https://github.com/istio/istio/commits/master
- https://istio.io/news/security/
- https://istio.io/news/security/istio-security-2020-001/
- https://raw.githubusercontent.com/istio/istio/release-1.4/security/tools/jwt/samples/jwks.json
- https://bugzilla.redhat.com/show_bug.cgi?id=1798247
Frequently Asked Questions
What is CVE-2020-8595?
CVE-2020-8595 is a vulnerability in Istio versions 1.2.10 (End of Life) and prior, 1.3 through 1.3.7, and 1.4 through 1.4.3 that allows authentication bypass.
What is the severity of CVE-2020-8595?
The severity of CVE-2020-8595 is high, with a severity value of 7.3.
How does CVE-2020-8595 allow authentication bypass?
CVE-2020-8595 allows authentication bypass through the Authentication Policy exact-path matching logic, which can allow unauthorized access to HTTP paths even if they are configured to be only accessed after presenting a valid JWT token.
Which versions of Istio are affected by CVE-2020-8595?
Istio versions 1.2.10 (End of Life) and prior, 1.3 through 1.3.7, and 1.4 through 1.4.3 are affected by CVE-2020-8595.
How can I fix CVE-2020-8595?
To fix CVE-2020-8595, upgrade to Istio version 1.3.8 or higher if you are using versions 1.3 through 1.3.7, or upgrade to version 1.4.4 or higher if you are using versions 1.4 through 1.4.3.
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