Amazon Linux 2 : postgresql (ALASPOSTGRESQL12-2024-007)

high Nessus Plugin ID 189478

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of postgresql installed on the remote host is prior to 12.17-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2POSTGRESQL12-2024-007 advisory.

Certain aggregate function calls receiving unknown-type arguments could disclose bytes of server memory from the end of the unknown-type value to the next zero byte. One typically gets an unknown-type value via a string literal having no type designation. We have not confirmed or ruled out viability of attacks that arrange for presence of notable, confidential information in disclosed bytes. (CVE-2023-5868)

While modifying certain SQL array values, missing overflow checks let authenticated database users write arbitrary bytes to a memory area that facilitates arbitrary code execution. Missing overflow checks also let authenticated database users read a wide area of server memory. The CVE-2021-32027 fix covered some attacks of this description, but it missed others. (CVE-2023-5869)

The documentation says the pg_cancel_backend role cannot signal a backend owned by a superuser. On the contrary, it can signal background workers, including the logical replication launcher. It can signal autovacuum workers and the autovacuum launcher. Signaling autovacuum workers and those two launchers provides no meaningful exploit, so exploiting this vulnerability requires a non-core extension with a less-resilient background worker. For example, a non-core background worker that does not auto-restart would experience a denial of service with respect to that particular background worker. (CVE-2023-5870)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Run 'yum update postgresql' to update your system.

Plugin Details

Severity: High

ID: 189478

File Name: al2_ALASPOSTGRESQL12-2024-007.nasl

Version: 1.2

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 1/24/2024

Updated: 12/11/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2023-5869

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:postgresql-llvmjit, p-cpe:/a:amazon:linux:postgresql-contrib, p-cpe:/a:amazon:linux:postgresql-plpython3, p-cpe:/a:amazon:linux:postgresql, p-cpe:/a:amazon:linux:postgresql-upgrade-devel, p-cpe:/a:amazon:linux:postgresql-docs, p-cpe:/a:amazon:linux:postgresql-pltcl, p-cpe:/a:amazon:linux:postgresql-server-devel, p-cpe:/a:amazon:linux:postgresql-test-rpm-macros, p-cpe:/a:amazon:linux:postgresql-plperl, p-cpe:/a:amazon:linux:postgresql-plpython2, p-cpe:/a:amazon:linux:postgresql-test, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:postgresql-debuginfo, p-cpe:/a:amazon:linux:postgresql-upgrade, p-cpe:/a:amazon:linux:postgresql-static, p-cpe:/a:amazon:linux:postgresql-server

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 1/19/2024

Vulnerability Publication Date: 11/9/2023

Reference Information

CVE: CVE-2023-5868, CVE-2023-5869, CVE-2023-5870

IAVB: 2023-B-0088-S

Detections

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