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Authentication Bypass Affecting com.alibaba.nacos:nacos-common package, versions [,1.4.1)

0.0
high

Snyk CVSS

    Attack Complexity High
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    Exploit Maturity Proof of concept
    EPSS 96.6% (100th percentile)
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NVD
9.8 critical

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  • Snyk ID SNYK-JAVA-COMALIBABANACOS-1277194
  • published 28 Apr 2021
  • disclosed 27 Apr 2021
  • credit Unknown
Report a new vulnerability Found a mistake?

Introduced: 27 Apr 2021

CVE-2021-29441 Open this link in a new tab
CWE-287 Open this link in a new tab

How to fix?

Upgrade com.alibaba.nacos:nacos-common to version 1.4.1 or higher.

Overview

com.alibaba.nacos:nacos-common is a service discovery, configuration and service management platform for building cloud native applications.

Affected versions of this package are vulnerable to Authentication Bypass. 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.