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 cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| go/github.com/envoyproxy/envoy | <=1.9.0 | 1.9.1 |
| Envoyproxy Envoy | <=1.9.0 | |
| <=1.9.0 |
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Reference Links
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-xcx5-93pw-jw2w
- https://nvd.nist.gov/vuln/detail/CVE-2019-9901
- https://github.com/envoyproxy/envoy/issues/6435
- https://groups.google.com/forum/#!topic/envoy-announce/VoHfnDqZiAM
- https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_history
- https://github.com/envoyproxy/envoy/blob/main/security/postmortems/cve-2019-9900.md
- https://github.com/envoyproxy/envoy/commit/e668e669677e52a00d99652b5a260d1cedafdfa8
- https://github.com/advisories/GHSA-2wmf-p7f8-w42h (Advisory)
- https://istio.io/blog/2019/announcing-1.1.2/
- https://access.redhat.com/errata/RHSA-2019:0741
- https://access.redhat.com/security/cve/cve-2019-9901
- https://bugzilla.redhat.com/show_bug.cgi?id=1698025
- https://groups.google.com/forum/#%21topic/envoy-announce/VoHfnDqZiAM
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).
- collector/github-advisory-latest
- alias/GHSA-2wmf-p7f8-w42h
- alias/CVE-2019-9901
- collector/github-advisory
- collector/nvd-index
- collector/nvd-cve
- collector/redhat-bugzilla
- source/Red Hat
- agent/type
- agent/first-publish-date
- agent/weakness
- agent/remedy
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/severity
- agent/description
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/last-modified-date
- agent/author
- agent/softwarecombine
- agent/event
- agent/tags
- agent/trending
- package-manager/go
- vendor/envoyproxy
- canonical/envoyproxy envoy
- version/envoyproxy envoy/1.9.0