#VU61937 Deserialization of Untrusted Data in H2 Database - CVE-2021-42392

Vulnerability identifier: #VU61937

Vulnerability risk: Critical

CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Red]

CVE-ID: CVE-2021-42392

CWE-ID: CWE-502

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
H2 Database
Server applications / Database software

Vendor: H2 Database Engine

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data within the org.h2.util.JdbcUtils.getConnection method. A remote attacker can pass a JNDI driver name and a URL leading to a LDAP or RMI servers and execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

H2 Database: 1.1 - 2.0.204

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External links
https://github.com/h2database/h2database/security/advisories/GHSA-h376-j262-vhq6
https://jfrog.com/blog/the-jndi-strikes-back-unauthenticated-rce-in-h2-database-console/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.