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| Rule General Information |
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| Release Date: | 2021-11-10 | |
| Rule Name: | Alibaba Nacos AuthFilter Authentication Bypass Vulnerability (CVE-2021-29441) | |
| Severity: | ||
| CVE ID: | ||
| Rule Protection Details |
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| 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. | |
| Impact: | An attacker could exploit this vulnerability to have unspecified effect. | |
| Affected OS: | Windows, Linux, Others | |
| Reference: | https://github.com/advisories/GHSA-36hp-jr8h-556f https://github.com/alibaba/nacos/issues/4701 https://github.com/alibaba/nacos/pull/4703 |
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| Solutions |
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| The vendor has released upgrade patches to fix vulnerabilities, please visit: https://github.com/alibaba/nacos/pull/4703 |