CVE-2021-36774 Mysql JDBC Connector Deserialize RCE

What is CVE-2021-36774?

CVE-2021-36774 is a medium-severity unsafe deserialization vulnerability in Apache Kylin, published on 6 Jan 2022. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Apache Kylin allows users to read data from other database systems using JDBC. The MySQL JDBC driver supports certain properties, which, if left unmitigated, can allow an attacker to execute arbitrary code from a hacker-controlled malicious MySQL server within Kylin server processes. This issue affects Apache Kylin 2 version 2.6.6 and prior versions; Apache Kylin 3 version 3.1.2 and prior versions.

Which versions are affected by CVE-2021-36774?

2 open source packages ship an affected version, including org.apache.kylin:kylin. It affects 1 product.

Products include Apache Kylin.

How do I fix CVE-2021-36774?

Upgrade org.apache.kylin:kylin to 3.1.3 or later.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2021-36774 being exploited?

There is no known exploitation of CVE-2021-36774 in the wild and no public exploit code.

Other vulnerabilities in Apache Kylin

• CVE-2020-1956 Apache Kylin OS Command Injection Exploited High 8.8
• CVE-2026-62390 Apache Kylin: SQL Injection Vulnerability in Catalog Cache Refresh API Critical 9.8
• CVE-2022-44621 Apache Kylin: Command injection by Diagnosis Controller Critical 9.8
• CVE-2022-24697 Apache Kylin vulnerable to remote code execution Critical 9.8
• CVE-2021-31522 Apache Kylin unsafe class loading Critical 9.8

Sources

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

Also known as GHSA-5429-pjww-7675.