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Overview

com.h2database:h2 is a database engine

Affected versions of this package are vulnerable to Remote Code Execution (RCE). It provides a web console for managing the database, and by default it does not have a password set. The CREATE ALIAS function calls Java code, allowing an attacker to execute arbitrary Java code on projects running the h2 database.

NOTE: To be remotely exploitable, the affected application must be configured with the non-default setting webAllowOthers=true, either in a config file or as a parameter passed in when the servlet is invoked. The vulnerability can be avoided by setting a password on the database and/or restricting access to localhost using the above setting.

PoC

CREATE ALIAS REVERSE AS $$ String reverse(String s) { return new StringBuilder(s).reverse().toString(); } $$;
CALL REVERSE('Test');

Remediation

There is no fixed version for com.h2database:h2.

References

• Datomic Blog
• Datomic Security Advisory
• Exploit DB
• GitHub Issue
• Matheus Bernardes' Blog