CVE-2021-29441
"Nacos AuthFilter Backdoor Vulnerability"
Description
Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, when configured to use authentication (-Dnacos.core.auth.enabled=true) Nacos uses the AuthFilter servlet filter to enforce authentication. This filter has a backdoor that enables Nacos servers to bypass this filter and therefore skip authentication checks. This mechanism relies on the user-agent HTTP header so it can be easily spoofed. This issue may allow any user to carry out any administrative tasks on the Nacos server.
INFO
Published Date :
April 27, 2021, 9:15 p.m.
Last Modified :
May 7, 2021, 11:09 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-29441 has a 27 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-29441.
| URL | Resource |
|---|---|
| https://github.com/advisories/GHSA-36hp-jr8h-556f | Exploit Third Party Advisory |
| https://github.com/alibaba/nacos/issues/4701 | Exploit Third Party Advisory |
| https://github.com/alibaba/nacos/pull/4703 | Patch Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
这是一个每天同步Vulnerability-Wiki中docs-base中内容的项目
HTML
All CVE - PoC in GitHub
poc proofofconcept tester allcve cvegithub cvenew cvepoc cveupdate
None
Nacos 综合利用工具
exploit nacos vulnerability
None
Nacos漏洞综合利用GUI工具，集成了默认口令漏洞、SQL注入漏洞、身份认证绕过漏洞、反序列化漏洞的检测及其利用
Java Batchfile
bounty collection
Shell Python Dockerfile Ruby JavaScript ASP.NET Classic ASP HTML PHP Jupyter Notebook
nacos api bypass & jwt bypass & get all configs
nacos vul exp cve poc config tool
Python
一键getshell集成化工具
Alibaba Nacos存在默认token.secret.key，导致远程攻击者可以绕过密钥认证接管Nacos
An integrated BurpSuite vulnerability detection plug-in.
None
Python
None
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-29441 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-29441 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
May. 07, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/advisories/GHSA-36hp-jr8h-556f No Types Assigned https://github.com/advisories/GHSA-36hp-jr8h-556f Exploit, Third Party Advisory Changed Reference Type https://github.com/alibaba/nacos/issues/4701 No Types Assigned https://github.com/alibaba/nacos/issues/4701 Exploit, Third Party Advisory Changed Reference Type https://github.com/alibaba/nacos/pull/4703 No Types Assigned https://github.com/alibaba/nacos/pull/4703 Patch, Third Party Advisory Added CWE NIST CWE-290 Added CPE Configuration OR *cpe:2.3:a:alibaba:nacos:*:*:*:*:*:*:*:* versions up to (excluding) 1.4.1
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-29441 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-29441
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
96.90 }} 0.03%
score
0.99756
percentile