CVE Vulnerability

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.

7.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

9.8 /10

CVSS v3.0 : CRITICAL

V3 Legend

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

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
Configurations

Configuration 1

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

Published : 2021-04-27 09:15

Updated : 2021-05-07 11:09

NVD link : CVE-2021-29441

Mitre link : CVE-2021-29441

Products Affected
No products.
CWE
CWE-290

Authentication Bypass by Spoofing