Is CVE-2021-39162 in the CISA KEV catalog?

No. CVE-2021-39162 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-39162?

CVE-2021-39162 has a CVSS v3 base score of 8.6 (HIGH).

What is the EPSS score for CVE-2021-39162?

CVE-2021-39162 has an EPSS score of 1.59% (73th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-39162?

Upgrade envoy to 1.18.4 or later.

CVE & CISA-KEV Catalog

CVE-2021-39162

HIGHEPSS 73th pctl

8.6

CVSS v3

NVD

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.

CWE-754

How to fix

Remediation Available

envoyNVD

Affected:< 1.18.4Fixed in:1.18.4CVE-2021-39162derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Exploit Intelligence

1.59%probability of exploitation in 30 days

73rdpercentile

Elevated risk: more likely to be exploited than 73% of all known CVEs.

References

Third-Party Advisory3

Embed a live status badge for CVE-2021-39162

Markdown

[![CVE-2021-39162](https://tridentstack.com/cve/badge/CVE-2021-39162.svg)](https://tridentstack.com/cve/CVE-2021-39162)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-39162"><img src="https://tridentstack.com/cve/badge/CVE-2021-39162.svg" alt="CVE-2021-39162"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.