Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1namNnLXZyeGcteG1nds0VsA

Incorrect handling of H2 GOAWAY + SETTINGS frames

Envoy, which Pomerium is based on, can abnormally terminate if an H/2 GOAWAY and SETTINGS frame are received in the same IO event.

Impact

This can lead to a DoS in the presence of untrusted upstream servers.

Patches

0.15.1 contains an upgraded envoy binary with this vulnerability patched.

Workarounds

If only trusted upstreams are configured, there is not substantial risk of this condition being triggered.

References

envoy GSA
envoy CVE
envoy announcement

For more information

If you have any questions or comments about this advisory:

• Open an issue in pomerium/pomerium
• Email us at [email protected]

Permalink: https://github.com/advisories/GHSA-gjcg-vrxg-xmgv
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1namNnLXZyeGcteG1nds0VsA
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 3 years ago
Updated: almost 2 years ago

CVSS Score: 8.6
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Percentage: 0.00195
EPSS Percentile: 0.57134

Identifiers: GHSA-gjcg-vrxg-xmgv, CVE-2021-39162
References:

• https://github.com/pomerium/pomerium/security/advisories/GHSA-gjcg-vrxg-xmgv
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8
• https://nvd.nist.gov/vuln/detail/CVE-2021-39162
• https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ
• https://github.com/advisories/GHSA-gjcg-vrxg-xmgv

Repository: https://github.com/pomerium/pomerium
Blast Radius: 6.0

Affected Packages