CVE-2021-43557
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Apache Apisix
PublishedNov 22, 2021
First seenNov 22, 2021
How to fix
Update
- apache apisix2.10.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache apisix | v < 2.10.2 | 2.10.2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.