CWE
706
Advisory Published
CVE Published
Advisory Published
Updated

CVE-2019-9901

First published: Tue Apr 09 2019(Updated: )

A flaw was found in Envoy 1.9.0 and older. Envoy does not normalize HTTP URL paths. A remote attacker may craft a path with a relative path, e.g. something/../admin, to bypass access control, e.g. a block on /admin. A backend server could then interpret the unnormalized path and provide an attacker access beyond the scope provided for by the access control policy. Upstream issue: <a href="https://github.com/envoyproxy/envoy/issues/6435">https://github.com/envoyproxy/envoy/issues/6435</a> References: <a href="https://istio.io/blog/2019/announcing-1.1.2/">https://istio.io/blog/2019/announcing-1.1.2/</a>

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
go/github.com/envoyproxy/envoy<=1.9.0
1.9.1
Envoyproxy Envoy<=1.9.0

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Frequently Asked Questions

  • What is the vulnerability ID for this vulnerability?

    The vulnerability ID for this vulnerability is CVE-2019-9901.

  • What is the severity of CVE-2019-9901?

    CVE-2019-9901 has a severity level of critical.

  • What software versions are affected by CVE-2019-9901?

    Envoy 1.9.0 and versions before 1.9.0 are affected by CVE-2019-9901.

  • How can an attacker exploit CVE-2019-9901?

    An attacker can exploit CVE-2019-9901 by crafting a relative path to bypass access control.

  • Where can I find more information about CVE-2019-9901?

    You can find more information about CVE-2019-9901 at the following references: [github.com/envoyproxy/envoy/security/advisories/GHSA-xcx5-93pw-jw2w](https://github.com/envoyproxy/envoy/security/advisories/GHSA-xcx5-93pw-jw2w) and [nvd.nist.gov/vuln/detail/CVE-2019-9901](https://nvd.nist.gov/vuln/detail/CVE-2019-9901).

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