Detections
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CentOS 8 : libtar (CESA-2023:2898)

critical Nessus Plugin ID 175845

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Synopsis

The remote CentOS host is missing one or more security updates.

Description

The remote CentOS Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the CESA-2023:2898 advisory.

 - An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longlink, causing an out-of-bounds read. (CVE-2021-33643)

 - An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longname, causing an out-of-bounds read. (CVE-2021-33644)

 - The th_read() function doesn't free a variable t->th_buf.gnu_longlink after allocating memory, which may cause a memory leak. (CVE-2021-33645)

 - The th_read() function doesn't free a variable t->th_buf.gnu_longname after allocating memory, which may cause a memory leak. (CVE-2021-33646)

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 libtar package.

See Also

https://access.redhat.com/errata/RHSA-2023:2898

Plugin Details

Severity: Critical

ID: 175845

File Name: centos8_RHSA-2023-2898.nasl

Version: 1.0

Type: local

Agent: unix

Published: 5/16/2023

Updated: 5/16/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

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

CVSS Score Source: CVE-2021-33644

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

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

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

CVSS Score Source: CVE-2021-33643

Vulnerability Information

CPE: cpe:/o:centos:centos:8-stream, p-cpe:/a:centos:centos:libtar

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/16/2023

Vulnerability Publication Date: 8/10/2022

Reference Information

CVE: CVE-2021-33643, CVE-2021-33644, CVE-2021-33645, CVE-2021-33646

RHSA: 2023:2898