Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.94
EPSS Ranking 99.9%
CVSS Severity
CVSS v3 Score 8.6
CVSS v2 Score 7.5
References
Products affected by CVE-2021-29441
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cpe:2.3:a:alibaba:nacos:0.1.0
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cpe:2.3:a:alibaba:nacos:0.2.0
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cpe:2.3:a:alibaba:nacos:0.2.1
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cpe:2.3:a:alibaba:nacos:0.3.0
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cpe:2.3:a:alibaba:nacos:0.4.0
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cpe:2.3:a:alibaba:nacos:0.5.0
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cpe:2.3:a:alibaba:nacos:0.6.0
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cpe:2.3:a:alibaba:nacos:0.6.1
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cpe:2.3:a:alibaba:nacos:0.7.0
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cpe:2.3:a:alibaba:nacos:0.8.0
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cpe:2.3:a:alibaba:nacos:0.9.0
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cpe:2.3:a:alibaba:nacos:1.0.0
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cpe:2.3:a:alibaba:nacos:1.0.1
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cpe:2.3:a:alibaba:nacos:1.1.0
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cpe:2.3:a:alibaba:nacos:1.1.1
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cpe:2.3:a:alibaba:nacos:1.1.3
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cpe:2.3:a:alibaba:nacos:1.1.4
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cpe:2.3:a:alibaba:nacos:1.2.0
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cpe:2.3:a:alibaba:nacos:1.2.1
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cpe:2.3:a:alibaba:nacos:1.3.0
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cpe:2.3:a:alibaba:nacos:1.3.1
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cpe:2.3:a:alibaba:nacos:1.3.2
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cpe:2.3:a:alibaba:nacos:1.4.0