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CVE-2021-43557 Details

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NameCVE-2021-43557
StatusCandidate
DescriptionThe 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.
ReferencesMISC: https://lists.apache.org/thread/18jyd458ptocr31rnkjs71w4h366mv7h
URL: https://lists.apache.org/thread/18jyd458ptocr31rnkjs71w4h366mv7h
MLIST:[oss-security] 20211122 CVE-2021-43557: Apache APISIX: Path traversal in request_uri variable
URL: http://www.openwall.com/lists/oss-security/2021/11/22/1
MLIST:[oss-security] 20211122 Re: CVE-2021-43557: Apache APISIX: Path traversal in request_uri variable
URL: http://www.openwall.com/lists/oss-security/2021/11/22/2
MLIST:[oss-security] 20211123 Re: CVE-2021-43557: Apache APISIX: Path traversal in request_uri variable
URL: http://www.openwall.com/lists/oss-security/2021/11/23/1
PhaseAssigned (20211109)
VotesNone (candidate not yet proposed)
Comments


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