Description
The uri-block plugin in Apache APISIX before 2.10.2 uses $request_uri without verification. The $request_uri is the full original request URI without normalization. This makes it possible to construct a URI to bypass the block list on some occasions. For instance, when the block list contains "^/internal/", a URI like `//internal/` can be used to bypass it. Some other plugins also have the same issue. And it may affect the developer's custom plugin.
Published: 2021-11-22
Score: 7.5 High
EPSS: 58.3% High
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

Vendor Workaround

1. Upgrade to APISIX 2.10.2, or apply this commit which provides a normalized $request_uri: https://github.com/apache/apisix/commit/9fc38330e82ce46e2aaabceef7d61708c91782db 2. Carefully review custom code, find & fix the usage of $request_uri without verification.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2024-08-04T04:03:07.927Z

Reserved: 2021-11-09T00:00:00.000Z

Link: CVE-2021-43557

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-11-22T09:15:07.627

Modified: 2024-11-21T06:29:25.887

Link: CVE-2021-43557

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses