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Amazon Linux AMI : expat (ALAS-2020-1460) (deprecated)

high Nessus Plugin ID 144463

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Synopsis

This plugin has been deprecated.

Description

The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2020-1460 advisory.

 - In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks). (CVE-2018-20843)

 - In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read. (CVE-2019-15903)

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

This plugin has been deprecated due to Amazon pulling the previously published advisory.

See Also

https://alas.aws.amazon.com/ALAS-2020-1460.html

https://access.redhat.com/security/cve/CVE-2018-20843

https://access.redhat.com/security/cve/CVE-2019-15903

Plugin Details

Severity: High

ID: 144463

File Name: ala_ALAS-2020-1460.nasl

Version: 1.4

Type: local

Agent: unix

Published: 12/18/2020

Updated: 12/23/2020

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2018-20843

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:expat-debuginfo, p-cpe:/a:amazon:linux:expat-devel, cpe:/o:amazon:linux, p-cpe:/a:amazon:linux:expat

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/16/2020

Vulnerability Publication Date: 6/24/2019

Reference Information

CVE: CVE-2018-20843, CVE-2019-15903

ALAS: 2020-1460