Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2021-43557— Path traversal in request_uri variable

Quick assessment

Affected
Apache Software Foundation Apache APISIX
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

AI Predicted 7.5 Difficulty: Easy EPSS 12.94% · P96
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-43557

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Path traversal in request_uri variable
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache APISIX 1.5 ~ Apache APISIX 1.5* -

II. Public POCs for CVE-2021-43557

# POC Description Source Link Shenlong Link
1 PoC for CVE-2021-43557 https://github.com/xvnpw/k8s-CVE-2021-43557-poc POC Details
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-43557

请登录查看更多情报信息。

Mailing List Discussions for CVE-2021-43557 (4)

IV. Related Vulnerabilities

Same product: Apache APISIX
Same vendor: Apache Software Foundation

V. Comments for CVE-2021-43557

No comments yet

Leave a comment