Alibaba Cloud Linux 3 : 0171: postgresql:13 (ALINUX3-SA-2026:0171)

high Nessus Plugin ID 324099

Synopsis

The remote Alibaba Cloud Linux host is missing one or more security updates.

Description

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by a vulnerability as referenced in the ALINUX3-SA-2026:0171 advisory.

Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

CVE-2026-6478:
Covert timing channel in comparison of MD5-hashed password in PostgreSQL authentication allows an attacker to recover user credentials sufficient to authenticate. This does not affect scram-sha-256 passwords, the default in all supported releases. However, current databases may have MD5-hashed passwords originating in upgrades from PostgreSQL 13 or earlier. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

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

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 324099

File Name: alinux3_sa_2026-0171.nasl

Version: 1.1

Type: Local

Family: Alibaba Cloud Linux Local Security Checks

Published: 7/1/2026

Updated: 7/1/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 51.98

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

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

CVSS Score Source: CVE-2026-6478

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: cpe:/o:alibabacloud:alibaba_cloud_linux_3, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:postgresql-pltcl, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:postgresql-plperl, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:postgresql-server-devel, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:postgresql-upgrade-devel, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:postgresql-plpython3, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:postgresql-server, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:postgresql-static, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:postgresql-test-rpm-macros, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:postgresql, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:postgresql-upgrade, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:postgresql-test, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:postgresql-contrib, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:postgresql-docs

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/29/2026

Vulnerability Publication Date: 5/14/2026

Reference Information

CVE: CVE-2026-6478

Detections

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