Alibaba Cloud Linux 3 : 0076: libsolv (ALINUX3-SA-2021:0076)

high Nessus Plugin ID 236468

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 multiple vulnerabilities as referenced in the ALINUX3-SA-2021:0076 advisory.

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

CVE-2019-20387 repodata_schema2id in repodata.c in libsolv before 0.7.6 has a heap-based buffer over-read via a last schema whose length is less than the length of the input schema.

CVE-2021-33928:
Buffer overflow vulnerability in function pool_installable in src/repo.h in libsolv before 0.7.17 allows attackers to cause a Denial of Service.

CVE-2021-33929:
Buffer overflow vulnerability in function pool_disabled_solvable in src/repo.h in libsolv before 0.7.17 allows attackers to cause a Denial of Service.

CVE-2021-33930:
Buffer overflow vulnerability in function pool_installable_whatprovides in src/repo.h in libsolv before 0.7.17 allows attackers to cause a Denial of Service.

CVE-2021-33938:
Buffer overflow vulnerability in function prune_to_recommended in src/policy.c in libsolv before 0.7.17 allows attackers to cause a Denial of Service.

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

Update the affected packages.

Plugin Details

Severity: High

ID: 236468

File Name: alinux3_sa_2021-0076.nasl

Version: 1.1

Type: local

Family: Alibaba Cloud Linux Local Security Checks

Published: 5/14/2025

Updated: 5/14/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2021-33938

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:libsolv-debugsource, cpe:/o:alibabacloud:alibaba_cloud_linux_3, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:libsolv-tools-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:libsolv-demo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:perl-solv-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:ruby-solv-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:libsolv-devel, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:python3-solv, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:ruby-solv, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:libsolv, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:python3-solv-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:libsolv-demo-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:libsolv-tools, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:libsolv-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:perl-solv

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/3/2021

Vulnerability Publication Date: 1/21/2020

Reference Information

CVE: CVE-2019-20387, CVE-2021-33928, CVE-2021-33929, CVE-2021-33930, CVE-2021-33938

Detections

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