Detections
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AlmaLinux 8 : expat (ALSA-2020:4484)

high Nessus Plugin ID 157606

Synopsis

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

Description

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2020:4484 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.

Solution

Update the affected expat and / or expat-devel packages.

See Also

https://errata.almalinux.org/8/ALSA-2020-4484.html

Plugin Details

Severity: High

ID: 157606

File Name: alma_linux_ALSA-2020-4484.nasl

Version: 1.5

Type: local

Published: 2/9/2022

Updated: 11/10/2023

Supported Sensors: Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.4

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: 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:F/RL:O/RC:C

CVSS Score Source: CVE-2019-15903

Vulnerability Information

CPE: p-cpe:/a:alma:linux:expat-devel, cpe:/o:alma:linux:8, p-cpe:/a:alma:linux:expat

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/3/2020

Vulnerability Publication Date: 6/24/2019

Reference Information

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

IAVA: 2021-A-0480