CVE - CVE-2021-43557

CVE-ID
CVE-2021-43557	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC: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
Assigning CNA
Apache Software Foundation
Date Record Created
20211109	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20211109)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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