Vulnerability Report

CVE-2021-39206

Title: Incorrect Routing/Authorization in Pomerium

Auth Bypass

Proof Of Concept

No public PoC currently indexed for CVE-2021-39206.

CWE Category CWE-863
Published Date Sep 09, 2021
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 8.6 CVSS v3.1
Exploit Probability (EPSS)
1.46%

Vulnerability Summary

CVE-2021-39206: Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, contains two authorization related vulnerabilities CVE-2021-32777 and CVE-2021-32779. This may lead to incorrect routing or authorization policy decisions. With specially crafted requests, incorrect authorization or routing decisions may be made by Pomerium. Pomerium v0.14.8 and v0.15.1 contain an upgraded envoy binary with these vulnerabilities patched. This issue can only be triggered when using path prefix based policy. Removing any such policies should provide mitigation.

Impacted Vendors

E
enphase 1
E
envoyproxy 1
P
pomerium 1

Reference Links

https://github.com/envoyproxy/envoy/security/advisories/GHSA-6g4j-5vrw-2m8h https://github.com/envoyproxy/envoy/security/advisories/GHSA-r222-74fw-jqr9 https://github.com/pomerium/pomerium/security/advisories/GHSA-cfc2-wjcm-c8fm https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ https://github.com/envoyproxy/envoy/security/advisories/GHSA-6g4j-5vrw-2m8h https://github.com/envoyproxy/envoy/security/advisories/GHSA-r222-74fw-jqr9 https://github.com/pomerium/pomerium/security/advisories/GHSA-cfc2-wjcm-c8fm 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:H/I:N/A:N
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:H/A:N
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:P/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-39206 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:H/I:N/A:N

Affected Stack

No specific products linked.