Apache Log4j 2.0 < 2.3.2 / 2.4 < 2.12.4 / 2.13 < 2.17.1 RCE

medium Nessus Plugin ID 156327

Synopsis

A package installed on the remote host is affected by a remote code execution vulnerability.

Description

The version of Apache Log4j on the remote host is 2.0 < 2.3.2, 2.4 < 2.12.4, or 2.13 < 2.17.1. It is, therefore, affected by a remote code execution vulnerability. Apache Log4j2 versions 2.0-beta7 through 2.17.0 (excluding security fix releases 2.3.2 and 2.12.4) are vulnerable to a remote code execution (RCE) attack where an attacker with permission to modify the logging configuration file can construct a malicious configuration using a JDBC Appender with a data source referencing a JNDI URI which can execute remote code. This issue is fixed by limiting JNDI data source names to the java protocol in Log4j2 versions 2.17.1, 2.12.4, and 2.3.2.

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

Solution

Upgrade to Apache Log4j version 2.17.1, 2.12.4, or 2.3.2 or later, or apply the vendor mitigation.

Upgrading to the latest versions for Apache Log4j is highly recommended as intermediate versions / patches have known high severity vulnerabilities and the vendor is updating their advisories often as new research and knowledge about the impact of Log4j is discovered. Refer to https://logging.apache.org/log4j/2.x/security.html for the latest versions.

See Also

https://logging.apache.org/log4j/2.x/security.html

Plugin Details

Severity: Medium

ID: 156327

File Name: apache_log4j_2_17_1.nasl

Version: 1.8

Type: local

Agent: windows, macosx, unix

Family: Misc.

Published: 12/28/2021

Updated: 7/4/2022

Configuration: Enable thorough checks

Supported Sensors: Nessus Agent

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

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

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

CVSS Score Source: CVE-2021-44832

CVSS v3

Risk Factor: Medium

Base Score: 6.6

Temporal Score: 5.8

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

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

Vulnerability Information

CPE: cpe:/a:apache:log4j

Required KB Items: installed_sw/Apache Log4j

Exploit Ease: No known exploits are available

Patch Publication Date: 12/28/2021

Vulnerability Publication Date: 12/28/2021

Reference Information

CVE: CVE-2021-44832

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