SB2020031233 - Gentoo update for PostgreSQL

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Memory leak (CVE-ID: CVE-2019-10129)

The vulnerability allows a remote attacker to read parts of system memory.

The vulnerability exists due memory leak when processing INSERT queries. A remote authenticated user can execute a specially crafted INSERT statement to a partitioned table and read parts of memory.

2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-10130)

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to incorrect implementation of row security policies. A remote attacker can use statistics, generated for tables to bypass row security policies and gain access to restricted rows.

3) Stack-based buffer overflow (CVE-ID: CVE-2019-10164)

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

The vulnerability exists due to a boundary error when processing users passwords. A remote authenticated user can change his/her password to a specially crafted string, trigger stack-based buffer overflow and execute arbitrary code on the target system or crash the PostgreSQL process.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

4) Improper Authorization (CVE-ID: CVE-2020-1720)

The vulnerability allows a remote attacker to perform unauthorized modification of data in database.

The vulnerability exists due to the ALTER ... DEPENDS ON EXTENSION sub-commands do not perform authorization checks, which can allow an unprivileged user to drop any function, procedure, materialized view, index, or trigger under certain conditions. This attack is possible if an administrator has installed an extension and an unprivileged user can CREATE, or an extension owner either executes DROP EXTENSION predictably or can be convinced to execute DROP EXTENSION.

Remediation

Install update from vendor's website.

References

• https://security.gentoo.org/
• https://security.gentoo.org/glsa/202003-03