CVE-2021-29258
First published: Wed Mar 24 2021(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/envoyproxy/envoy | <1.17.2 | 1.17.2 |
| Envoy Proxy | =1.14.6 | |
| Envoy Proxy | =1.15.3 | |
| Envoy Proxy | =1.16.2 | |
| Envoy Proxy | =1.17.1 |
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Reference Links
- https://blog.envoyproxy.io
- https://github.com/envoyproxy/envoy-setec/pull/230
- https://github.com/envoyproxy/envoy/releases/tag/v1.14.0
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-rqvq-hxw5-776j
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfg
- https://github.com/envoyproxy/envoy/blob/main/source/docs/h2_metadata.md
- https://istio.io/latest/news/security/istio-security-2021-003/
- https://access.redhat.com/errata/RHSA-2021:1324
- https://access.redhat.com/errata/RHSA-2021:1322
- https://access.redhat.com/security/cve/cve-2021-29258
- https://bugzilla.redhat.com/show_bug.cgi?id=1942280
Frequently Asked Questions
What is CVE-2021-29258?
CVE-2021-29258 is a vulnerability discovered in Envoy 1.14.0 that allows for a remotely exploitable crash for HTTP2 Metadata.
How severe is CVE-2021-29258?
CVE-2021-29258 has a severity rating of 7.5 (high).
How does CVE-2021-29258 occur?
CVE-2021-29258 occurs when an empty METADATA map triggers a Reachable Assertion in Envoy.
Which versions of Envoy are affected by CVE-2021-29258?
Envoy versions 1.14.6, 1.15.3, 1.16.2, and 1.17.1 are affected by CVE-2021-29258.
How can CVE-2021-29258 be fixed or mitigated?
To fix CVE-2021-29258, upgrade to Envoy version 1.17.2 or later.
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- version/envoy proxy/1.16.2
- version/envoy proxy/1.17.1