SB2023090239 - openEuler 22.03 LTS SP2 update for libpq

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2023-2454)

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

The vulnerability exists due to improperly imposed security restrictions. A remote database user with   CREATE privilege can bypass protective search_path changes via "CREATE SCHEMA ... schema_element" command and execute arbitrary code on the system.

2) Security features bypass (CVE-ID: CVE-2023-2455)

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.

3) SQL injection (CVE-ID: CVE-2023-39417)

The vulnerability allows a remote attacker to execute arbitrary SQL queries in database.

The vulnerability exists due to insufficient sanitization of user-supplied data within the extension script @substitutions@, which uses @extowner@, @extschema@, or @extschema:...@ inside a quoting construct. A remote attacker can send a specially crafted request to the affected application and execute arbitrary SQL commands within the application database.

4) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2023-39418)

The vulnerability allows a remote user to escalate privileges within the application.

The vulnerability exists due to the MERGE command does not properly enforce UPDATE or SELECT row security policies. A remote user can read or update protected data.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1568