CVE-2021-29441

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.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/alibaba/nacos/issues/4701	Exploit Third Party Advisory
https://github.com/advisories/GHSA-36hp-jr8h-556f	Exploit Third Party Advisory
https://github.com/alibaba/nacos/pull/4703	Patch Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:alibaba:nacos:*:*:*:*:*:*:*:*

Information

Published : 2021-04-27 14:15

Updated : 2021-05-07 16:09

NVD link : CVE-2021-29441

Mitre link : CVE-2021-29441

JSON object : View

CWE

CWE-290

Authentication Bypass by Spoofing

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Products Affected

alibaba

nacos

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