CVE-2019-18801
First published: Mon Nov 18 2019(Updated: )
An issue was discovered in Envoy 1.12.0. An untrusted remote client may send HTTP/2 requests that write to the heap outside of the request buffers when the upstream is HTTP/1. This may be used to corrupt nearby heap contents (leading to a query-of-death scenario) or may be used to bypass Envoy's access control mechanisms such as path based routing. An attacker can also modify requests from other users that happen to be proximal temporally and spatially.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Envoy Proxy | <=1.12.1 |
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Reference Links
- https://access.redhat.com/errata/RHSA-2019:4222
- https://blog.envoyproxy.io
- https://github.com/envoyproxy/envoy/commits/master
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-gxvv-x4p2-rppp
- https://groups.google.com/forum/#!forum/envoy-users
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1638035&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1638035&action=edit
- https://access.redhat.com/security/cve/CVE-2019-18801
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1638056&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1638056&action=edit
- https://groups.google.com/forum/#!topic/envoy-users/m7z5fGkCzPI
- https://access.redhat.com/security/cve/cve-2019-18801
- https://bugzilla.redhat.com/show_bug.cgi?id=1773444
- https://groups.google.com/forum/#%21forum/envoy-users
Frequently Asked Questions
What is the severity of CVE-2019-18801?
CVE-2019-18801 is considered a high-severity vulnerability due to its potential for remote code execution and memory corruption.
How do I fix CVE-2019-18801?
To fix CVE-2019-18801, you should upgrade Envoy to version 1.12.2 or later.
What impact can CVE-2019-18801 have on my system?
CVE-2019-18801 can lead to heap corruption, allowing attackers to exploit memory vulnerabilities or achieve a denial-of-service condition.
Which versions of Envoy are affected by CVE-2019-18801?
CVE-2019-18801 affects Envoy versions up to and including 1.12.1.
Is CVE-2019-18801 applicable to all Envoy deployments?
CVE-2019-18801 is applicable specifically to Envoy installations that handle HTTP/2 requests.
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