Apache Log4Shell RCE detection via Raw Socket Logging (Direct Check)

critical Nessus Plugin ID 156056

Synopsis

The version of Apache Log4j used on the remote server is affected by a remote code execution vulnerability.

Description

A remote code execution vulnerability exists in Apache Log4j < 2.15.0 due to insufficient protections on message lookup substitutions when dealing with user controlled input. A remote, unauthenticated attacker can explolit this, via a web request to execute arbitrary code with the permission level of the running Java process.

This plugin sends a test string to a set of open ports on the target host. This plugin requires that both the scanner and target machine have internet access.

Solution

Upgrade to Apache Log4j version 2.15.0 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

https://www.lunasec.io/docs/blog/log4j-zero-day/

Plugin Details

Severity: Critical

ID: 156056

File Name: apache_log4j_jndi_ldap_generic_raw.nbin

Version: 1.24

Type: remote

Family: Misc.

Published: 12/14/2021

Updated: 8/31/2022

Risk Information

VPR

Risk Factor: Critical

Score: 10

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 8.1

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

Temporal Vector: E:H/RL:OF/RC: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: E:H/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:apache:log4j

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/10/2021

Vulnerability Publication Date: 12/9/2021

CISA Known Exploited Dates: 12/24/2021

Exploitable With

CANVAS (CANVAS)

Reference Information

CVE: CVE-2021-44228

IAVA: 2021-A-0573, 2021-A-0596, 2021-A-0597, 2021-A-0598, 0001-A-0650