CVE-2021-39155: Authorization Policy Bypass Due to Case Insensitive Host Comparison

CVE-2021-39155 · Severity: low · CVSS 3.1 · Published 2021-08-30

Authorization Policy Bypass Due to Case Insensitive Host Comparison

Technologies: istio.io/istio (Go). Vendors: Go.

Quick answers

Is CVE-2021-39155 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2021-39155 being exploited in the wild.
How severe is CVE-2021-39155?
Low severity, with a CVSS score of 3.1, published 30 August 2021.
Which products and versions are affected?
istio.io/istio (Go) SEMVER:introduced=0,fixed=1.9.8.
Is there a fix for CVE-2021-39155?
Yes. istio.io/istio (Go): upgrade to 1.9.8 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2021-39155?
Check whether you run istio.io/istio (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • istio.io/istio (Go): upgrade to 1.9.8 or later
    go get istio.io/istio@v1.9.8

Affected products

  • istio.io/istio (Go) SEMVER:introduced=0,fixed=1.9.8

Identifiers

  • CVE-2021-39155
  • GHSA-7774-7vr3-cc8j

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