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CVE-2021-39204

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Date: September 9, 2021

Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, incorrectly handles resetting of HTTP/2 streams with excessive complexity. This can lead to high CPU utilization when a large number of streams are reset. This can result in a DoS condition. Pomerium versions 0.14.8 and 0.15.1 contain an upgraded envoy binary with this vulnerability patched.

Language: Go

Severity Score

Related Resources (6)

https://github.com/pomerium/pomerium
https://nvd.nist.gov/vuln/detail/CVE-2021-39204
https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xh3-33v5-chcc
https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ
https://github.com/pomerium/pomerium/security/advisories/GHSA-5wjf-62hw-q78r
https://www.mend.io/vulnerability-database/CVE-2021-39204

Severity Score

Weakness Type (CWE)

Excessive Iteration

CWE-834

Top Fix

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Upgrade to version github.com/pomerium/pomerium - v0.14.8;github.com/pomerium/pomerium - v0.15.1

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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