high7.5
CVE-2021-43557
The uri-block plugin in Apache APISIX before 2.10.2 uses $request_uri without verification.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Apache | Apisix | before 2.10.2 |
Weakness classification
References
- NVD record
- CVE.org record
- http://www.openwall.com/lists/oss-security/2021/11/22/1
- http://www.openwall.com/lists/oss-security/2021/11/22/2
- http://www.openwall.com/lists/oss-security/2021/11/23/1
- https://lists.apache.org/thread/18jyd458ptocr31rnkjs71w4h366mv7h
- http://www.openwall.com/lists/oss-security/2021/11/22/1
- http://www.openwall.com/lists/oss-security/2021/11/22/2
- http://www.openwall.com/lists/oss-security/2021/11/23/1
- https://lists.apache.org/thread/18jyd458ptocr31rnkjs71w4h366mv7h