CVE-2021-39204 is a Denial of Service (DoS) vulnerability affecting Pomerium, an open-source identity-aware access proxy, and its underlying Envoy proxy. The vulnerability stems from Envoy's inefficient handling of HTTP/2 stream resets, leading to high CPU utilization when numerous streams are reset. This issue carries a CVSS score of 7.5 (HIGH), indicating it can be exploited remotely with low attack complexity, resulting in a complete loss of availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 1.16.4CPE matchmatch criteria | cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* | ||
>= 1.17.0, < 1.17.4CPE matchmatch criteria | cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* | ||
>= 1.18.0, < 1.18.4CPE matchmatch criteria | cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* | ||
1.19.0CPE matchmatch criteria | cpe:2.3:a:envoyproxy:envoy:1.19.0:*:*:*:*:*:*:* | ||
< 0.14.8CPE matchmatch criteria | cpe:2.3:a:pomerium:pomerium:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.