Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alibaba | Nacos | < 1.4.1 |
Related Weaknesses (CWE)
References
- https://github.com/advisories/GHSA-36hp-jr8h-556fExploitThird Party Advisory
- https://github.com/alibaba/nacos/issues/4701ExploitThird Party Advisory
- https://github.com/alibaba/nacos/pull/4703PatchThird Party Advisory
- https://github.com/advisories/GHSA-36hp-jr8h-556fExploitThird Party Advisory
- https://github.com/alibaba/nacos/issues/4701ExploitThird Party Advisory
- https://github.com/alibaba/nacos/pull/4703PatchThird Party Advisory
FAQ
What is CVE-2021-29441?
CVE-2021-29441 is a vulnerability with a CVSS score of 8.6 (HIGH). 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=tru...
How severe is CVE-2021-29441?
CVE-2021-29441 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-29441?
Check the references section above for vendor advisories and patch information. Affected products include: Alibaba Nacos.