CVE-2021-29258 Details
Description
An issue was discovered in Envoy 1.14.0. There is a remotely exploitable crash for HTTP2 Metadata, because an empty METADATA map triggers a Reachable Assertion.
A denial-of-service vulnerability exists in Envoy version 1.14.0. When an empty METADATA map is sent in an HTTP/2 request, it triggers a reachable assertion, causing the application to crash. This issue is remotely exploitable.
Users can upgrade to Envoy versions 1.14.7, 1.15.4, 1.16.3, 1.17.2, or 1.18.0 to address this vulnerability. Alternatively, HTTP/2 Metadata frame support can be disabled.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://blog.envoyproxy.io | CVE | Vendor Advisory |
| https://github.com/envoyproxy/envoy/releases/tag/v1.14.0 | CVE | Third Party Advisory |
| https://github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfg | CVE | Not ApplicableThird Party Advisory |
| https://github.com/envoyproxy/envoy-setec/pull/230 | CVE | Broken Link |
| https://blog.envoyproxy.io | [email protected] | Vendor Advisory |
| https://github.com/envoyproxy/envoy/releases/tag/v1.14.0 | [email protected] | Third Party Advisory |
| https://github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfg | [email protected] | Not ApplicableThird Party Advisory |
| https://github.com/envoyproxy/envoy-setec/pull/230 | [email protected] | Broken Link |
| https://github.com/envoyproxy/envoy/security/advisories/GHSA-rqvq-hxw5-776j | [email protected] | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-617 | Reachable Assertion | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| envoyproxy envoy | 1.14.6 1.15.3 1.16.2 1.17.1 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Nov 21, 2024 | CVE Modified | CVE |
| May 14, 2024 | CVE Modified | [email protected] |
| May 27, 2021 | Initial Analysis | [email protected] |