#VU49733 Improper input validation in Oracle Database Server - CVE-2021-2054

Vulnerability identifier: #VU49733

Vulnerability risk: Medium

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-2054

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Oracle Database Server
Server applications / Database software

Vendor: Oracle

Description

The vulnerability allows a remote privileged user to execute arbitrary code.

The vulnerability exists due to improper input validation within the execution of stored procedures in the RDBMS Sharding feature in Oracle Database Server. A remote privileged user can exploit this vulnerability to execute arbitrary code.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Oracle Database Server: 12.2.0.1 - 19c

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External links
https://www.oracle.com/security-alerts/cpujan2021.html
https://www.zerodayinitiative.com/advisories/ZDI-21-083/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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