CVE-2021-43557: 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…

PriorityP352high7.5CVSS 3.1

AVNACLPRNUINSUCHINAN

EPSS

14.59%

96.2th percentile

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

2 ranges

Vendor	Product	Version range	Fixed in
apache	apisix	< 2.10.2	2.10.2
apache_software_foundation	apache_apisix	>= 1.5 < Apache APISIX 1.5*	Apache APISIX 1.5*

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N

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