Amazon Linux 2 : xstream (ALAS-2021-1593)

high Nessus Plugin ID 145450
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of xstream installed on the remote host is prior to 1.3.1-12. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2021-1593 advisory.

- XStream before version 1.4.14 is vulnerable to Remote Code Execution.The vulnerability may allow a remote attacker to run arbitrary shell commands only by manipulating the processed input stream. Only users who rely on blocklists are affected. Anyone using XStream's Security Framework allowlist is not affected. The linked advisory provides code workarounds for users who cannot upgrade. The issue is fixed in version 1.4.14. (CVE-2020-26217)

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

Solution

Run 'yum update xstream' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2021-1593.html

https://access.redhat.com/security/cve/CVE-2020-26217

Plugin Details

Severity: High

ID: 145450

File Name: al2_ALAS-2021-1593.nasl

Version: 1.2

Type: local

Agent: unix

Published: 1/26/2021

Updated: 1/26/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2020-26217

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:xstream, p-cpe:/a:amazon:linux:xstream-javadoc, cpe:/o:amazon:linux:2

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/25/2021

Vulnerability Publication Date: 11/16/2020

Reference Information

CVE: CVE-2020-26217

ALAS: 2021-1593