CVE-2020-19676 Incorrect Access Control in Nacos

What is CVE-2020-19676?

CVE-2020-19676 is a medium-severity missing authorization vulnerability in n/a, published on 30 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Nacos 1.1.4 is affected by: Incorrect Access Control. An environment can be set up locally to get the service details interface. Then other Nacos service names can be accessed through the service list interface. Service details can then be accessed when not logged in. (detail:https://github.com/alibaba/nacos/issues/2284)

Which versions are affected by CVE-2020-19676?

2 open source packages ship an affected version, including com.alibaba.nacos:nacos-common. It affects 1 product.

Products include Alibaba Nacos.

How do I fix CVE-2020-19676?

Upgrade com.alibaba.nacos:nacos-common to 1.2.0 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2020-19676 being exploited?

There is no known exploitation of CVE-2020-19676 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2021-43116 Use of Hard-coded Credentials in Nacos High 8.8
• CVE-2021-29441 Authentication bypass High 8.6
• CVE-2021-29442 Authentication bypass High 8.6
• CVE-2021-44667 Cross-site Scripting in Nacos Medium 6.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-qf76-pr7x-h7r4.