Apache Solr Log4Shell Direct Check (CVE-2021-44228)

critical Nessus Plugin ID 156471

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Synopsis

The remote web server contains a Java application that is affected by a remote code execution vulnerability.

Description

The version of Apache Solr running on the remote web server is affected by a remote code execution vulnerability in the bundled Apache Log4j logging library. Apache Log4j is vulnerable due to insufficient protections on message lookup substitutions when dealing with user controlled input. A remote, unauthenticated attacker can exploit this, via a web request, to execute arbitrary code with the permission level of the running Java process.

This plugin requires that both the scanner and target machine have internet access.

Solution

Upgrade to Apache Solr version 8.11.1 or later.

Plugin Details

Severity: Critical

ID: 156471

File Name: apache_solr_log4shell.nbin

Version: 1.74

Type: remote

Family: CGI abuses

Published: 1/5/2022

Updated: 7/14/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 10.0

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 8.1

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

CVSS Score Source: CVE-2021-44228

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 9.5

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

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

Vulnerability Information

CPE: cpe:/a:apache:solr

Required KB Items: installed_sw/Apache Solr

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/16/2021

Vulnerability Publication Date: 12/10/2021

CISA Known Exploited Vulnerability Due Dates: 12/24/2021

Exploitable With

CANVAS (CANVAS)

Core Impact

Reference Information

CVE: CVE-2021-44228

IAVA: 0001-A-0650, 2021-A-0573

Detections

Analytics