Vulnerability Report

CVE-2021-39162

Title: DoS in Pomerium due to Envoy vulnerability

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2021-39162.

CWE Category CWE-754
Published Date Sep 09, 2021
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 8.6 CVSS v3.1
Exploit Probability (EPSS)
1.64%

Vulnerability Summary

CVE-2021-39162: 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.

Impacted Vendors

E
enphase 1
E
envoyproxy 1
P
pomerium 1

Reference Links

https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8 https://github.com/pomerium/pomerium/security/advisories/GHSA-gjcg-vrxg-xmgv https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8 https://github.com/pomerium/pomerium/security/advisories/GHSA-gjcg-vrxg-xmgv https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ
CVSS v3.1
Source Entity [email protected]
Severity HIGH
8.6
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS v3.1
Source Entity [email protected]
Severity HIGH
8.6
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
5.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:N/I:N/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-39162 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Affected Stack

No specific products linked.