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CVE-2021-43557— Path traversal in request_uri variable

EPSS 58.26% · P98
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I. Basic Information for CVE-2021-43557

Vulnerability Information
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Vulnerability Title
Path traversal in request_uri variable
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Apache Apisix 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Apisix是美国阿帕奇（Apache）基金会的一个云原生的微服务API网关服务。该软件基于 OpenResty 和 etcd 来实现，具备动态路由和插件热加载，适合微服务体系下的 API 管理。 Apache APISIX 存在命令注入漏洞，该漏洞源于网络系统或产品的代码开发过程中存在设计或实现不当的问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
Apache Software FoundationApache APISIX 1.5 ~ Apache APISIX 1.5* -

II. Public POCs for CVE-2021-43557

#POC DescriptionSource LinkShenlong Link
1PoC for CVE-2021-43557https://github.com/xvnpw/k8s-CVE-2021-43557-pocPOC Details
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III. Intelligence Information for CVE-2021-43557

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IV. Related Vulnerabilities

Same product: Apache APISIX
Same vendor: Apache Software Foundation

V. Comments for CVE-2021-43557

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