CVE-2021-39206 json
Incorrect Authorization with specially crafted requests
published 5y ago modified 2mo ago also BIT-envoy-2021-39206 , EUVD-2021-2038 , GHSA-cfc2-wjcm-c8fm
- cvss
- 8.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.5%
- EPSS 1.5% chance of exploitation in 30 days, percentile 73%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/pomerium/pomerium 0.14.8, 0.15.1
- bitnami envoy 1.16.5, 1.17.4, 1.18.4, 1.19.1
- envoyproxy envoy 1.16.5, 1.17.4, 1.18.4
- pomerium pomerium 0.14.8
Is CVE-2021-39206 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
1.46% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N |
| GitHub | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N |
| NVD | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
| OSV | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/pomerium/pomerium | >=0.11.0, <0.14.8 >=0.15.0, <0.15.1 |
0.14.8 0.15.1 |
| bitnami | envoy | <1.16.5 >=1.17.0, <1.17.4 >=1.18.0, <1.18.4 >=1.19.0, <1.19.1 |
1.16.5 1.17.4 1.18.4 1.19.1 |
Affected products
- pomerium pomerium
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/envoyproxy/envoy/security/advisories/GHSA-r222-74fw-jqr9
web, third-party-advisory, advisory
-
github.com
/envoyproxy/envoy/security/advisories/GHSA-6g4j-5vrw-2m8h
web, third-party-advisory, advisory
-
groups.google.com
/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ
web, not-applicable
-
github.com
/pomerium/pomerium/security/advisories/GHSA-cfc2-wjcm-c8fm
web, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-39206
advisory, web
-
github.com
/pomerium/pomerium
package
Sources
- CVE List CVE-2021-39206
- GitHub Advisory GHSA-cfc2-wjcm-c8fm
- NVD CVE-2021-39206
- OSV BIT-envoy-2021-39206
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