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CVE-2021-43557
Good to know:
Date: November 22, 2021
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.
Language: LUA
Severity Score
Related Resources (5)
Severity Score
Weakness Type (CWE)
Command Injection
CWE-77Top Fix
CVSS v3
| Base Score: |
|
|---|---|
| Attack Vector (AV): | |
| Attack Complexity (AC): | |
| Privileges Required (PR): | |
| User Interaction (UI): | |
| Scope (S): | |
| Confidentiality (C): | NONE |
| Integrity (I): | PARTIAL |
| Availability (A): | NONE |
CVSS v2
| Base Score: |
|
|---|---|
| Access Vector (AV): | |
| Access Complexity (AC): | |
| Authentication (AU): | |
| Confidentiality (C): | HIGH |
| Integrity (I): | NONE |
| Availability (A): | NONE |
| Additional information: |