8.6

CVE-2021-39162: envoyproxy envoy

CVSS: 8.6v3.1HighModified
AliasesGHSA-gjcg-vrxg-xmgvBIT-envoy-2021-39162GO-2022-0933
Published 09-09-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-39162 is a high (CVSS 8.6) vulnerability in envoyproxy envoy. EPSS estimates a 1.64% chance of exploitation in the next 30 days, higher than 75.9% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v3.1 (CVE.org)
EPSS score
1.64%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 09-09-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, can abnormally terminate if an H/2 GOAWAY and SETTINGS frame are received in the same IO event. This can lead to a DoS in the presence of untrusted *upstream* servers. 0.15.1 contains an upgraded envoy binary with this vulnerability patched. If only trusted upstreams are configured, there is not substantial risk of this condition being triggered.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.64%

Chance of exploitation in the next 30 days

Percentile

76%

Versus all other CVEs

30-day change

0.00 pp

From 1.64% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.64%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Envoyproxy1 product
  • envoyEOL< 1.18.4 | 1.19.0
Github.com/pomerium1 product
  • pomerium< 0.15.1
Pomerium1 product

3 vendors · 3 products

References

5 links