Apache Log4Shell RCE detection via callback correlation (Direct Check SMB)

critical Nessus Plugin ID 156232

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.

Solution

Upgrade to Apache Log4j version 2.15.0 or later, or apply the vendor mitigation.

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: 156232

File Name: log4j_log4shell_smb.nbin

Version: 1.25

Type: remote

Published: 12/21/2021

Updated: 6/21/2022

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

Reference Information

CVE: CVE-2021-44228

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