Vulnerability identifier: #VU76042

Vulnerability risk: Low

CVSSv3.1: 2 [CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-2455

CWE-ID: CWE-254

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PostgreSQL
Server applications / Database software

Vendor: PostgreSQL Global Development Group

Description

The vulnerability allows a remote user to bypass implemented security restrictions.

The vulnerability exists due to incomplete fix for #VU40402 (CVE-2016-2193) that did not anticipate a scenario involving function inlining. This scenario can happen under security definer functions or when a common user and query is planned initially and then re-used across multiple SET ROLEs. Applying an incorrect policy may permit a user to complete otherwise-forbidden reads and modifications.

This affects only databases that have used CREATE POLICY to define a row security policy.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

PostgreSQL: 15.0 - 15.2, 14.0 - 14.7, 13.0 - 13.10, 12 - 12.14, 11.0 - 11.19, 10.0 - 10.23, 9.6.0 - 9.6.24, 9.5 - 9.5.25, 9.4 - 9.4.26, 9.3 - 9.3.25, 9.2 - 9.2.24, 9.1 - 9.1.24, 9.0 - 9.0.23

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External links
http://www.postgresql.org/about/news/postgresql-153-148-1311-1215-and-1120-released-2637/

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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.