CVE-2021-39206
Pomerium Envoy Authorization Routing Vulnerability
Description
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.
INFO
Published Date :
Sept. 9, 2021, 11:15 p.m.
Last Modified :
Nov. 21, 2024, 6:18 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-39206.
| URL | Resource |
|---|---|
| https://github.com/envoyproxy/envoy/security/advisories/GHSA-6g4j-5vrw-2m8h | Third Party Advisory |
| https://github.com/envoyproxy/envoy/security/advisories/GHSA-r222-74fw-jqr9 | Third Party Advisory |
| https://github.com/pomerium/pomerium/security/advisories/GHSA-cfc2-wjcm-c8fm | Third Party Advisory |
| https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ | Not Applicable |
| https://github.com/envoyproxy/envoy/security/advisories/GHSA-6g4j-5vrw-2m8h | Third Party Advisory |
| https://github.com/envoyproxy/envoy/security/advisories/GHSA-r222-74fw-jqr9 | Third Party Advisory |
| https://github.com/pomerium/pomerium/security/advisories/GHSA-cfc2-wjcm-c8fm | Third Party Advisory |
| https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ | Not Applicable |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-39206 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-39206 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/envoyproxy/envoy/security/advisories/GHSA-6g4j-5vrw-2m8h Added Reference https://github.com/envoyproxy/envoy/security/advisories/GHSA-r222-74fw-jqr9 Added Reference https://github.com/pomerium/pomerium/security/advisories/GHSA-cfc2-wjcm-c8fm Added Reference https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Sep. 27, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N Changed Reference Type https://github.com/envoyproxy/envoy/security/advisories/GHSA-6g4j-5vrw-2m8h No Types Assigned https://github.com/envoyproxy/envoy/security/advisories/GHSA-6g4j-5vrw-2m8h Third Party Advisory Changed Reference Type https://github.com/envoyproxy/envoy/security/advisories/GHSA-r222-74fw-jqr9 No Types Assigned https://github.com/envoyproxy/envoy/security/advisories/GHSA-r222-74fw-jqr9 Third Party Advisory Changed Reference Type https://github.com/pomerium/pomerium/security/advisories/GHSA-cfc2-wjcm-c8fm No Types Assigned https://github.com/pomerium/pomerium/security/advisories/GHSA-cfc2-wjcm-c8fm Third Party Advisory Changed Reference Type https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ No Types Assigned https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ Not Applicable Added CPE Configuration OR *cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* versions up to (excluding) 1.16.5 *cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* versions from (including) 1.17.0 up to (excluding) 1.17.4 *cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* versions from (including) 1.18.0 up to (excluding) 1.18.4 *cpe:2.3:a:envoyproxy:envoy:1.19.0:*:*:*:*:*:*:* *cpe:2.3:a:pomerium:pomerium:*:*:*:*:*:*:*:* versions from (including) 0.11.0 up to (excluding) 0.14.8 *cpe:2.3:a:pomerium:pomerium:0.15.0:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-39206 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-39206
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.16 }} -0.15%
score
0.33797
percentile