XML external entity injection in h2database



Published: 2021-12-22 | Updated: 2024-09-24
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-23463
CWE-ID CWE-611
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		H2 Database
Server applications / Database software

Vendor H2 Database Engine

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) XML External Entity injection

EUVDB-ID: #VU97673

Risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-23463

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied XML input. A remote attacker can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.

Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.

Mitigation

Install update from vendor's website.

Vulnerable software versions

H2 Database: 1.4.198 - 1.4.200

CPE2.3 External links

http://github.com/h2database/h2database/issues/3195
http://snyk.io/vuln/SNYK-JAVA-COMH2DATABASE-1769238
http://github.com/h2database/h2database/pull/3199
http://github.com/h2database/h2database/commit/d83285fd2e48fb075780ee95badee6f5a15ea7f8%23diff-008c2e4462609982199cd83e7cf6f1d6b41296b516783f6752c44b9f15dc7bc3
http://www.oracle.com/security-alerts/cpuapr2022.html
http://security.netapp.com/advisory/ntap-20230818-0010/


Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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