Apache Log4j 1.2 JMSAppender Remote Code Execution (CVE-2021-4104) - Nessus
High Plugin ID: 156103This page contains detailed information about the Apache Log4j 1.2 JMSAppender Remote Code Execution (CVE-2021-4104) Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.
Plugin Overview
ID: 156103
Name: Apache Log4j 1.2 JMSAppender Remote Code Execution (CVE-2021-4104)
Filename: apache_log4j_1_2.nasl
Vulnerability Published: 2021-12-14
This Plugin Published: 2021-12-15
Last Modification Time: 2022-04-11
Plugin Version: 1.9
Plugin Type: local
Plugin Family: Misc.
Dependencies:
apache_log4j_nix_installed.nbin, apache_log4j_win_installed.nbin
Required KB Items [?]: installed_sw/Apache Log4j
Vulnerability Information
Severity: High
Vulnerability Published: 2021-12-14
Patch Published: 2021-12-14
CVE [?]: CVE-2021-4104
CPE [?]: cpe:/a:apache:log4j
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 1.2. It is, therefore, affected by a remote code execution vulnerability when specifically configured to use JMSAppender.
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 2.16.0 or later since 1.x is end of life.
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.
Public Exploits
Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (GitHub)
Exploit Ease: Exploits (PoCs) are available
Here's the list of publicly known exploits and PoCs for verifying the Apache Log4j 1.2 JMSAppender Remote Code Execution (CVE-2021-4104) vulnerability:
- GitHub: https://github.com/Diablo5G/Certification-Prep
[CVE-2021-4104] - GitHub: https://github.com/GGongnanE/TodayILearned
[CVE-2021-4104] - GitHub: https://github.com/HackJava/Log4j2
[CVE-2021-4104] - GitHub: https://github.com/HynekPetrak/log4shell-finder
[CVE-2021-4104] - GitHub: https://github.com/NiftyBank/java-app
[CVE-2021-4104] - GitHub: https://github.com/PAXSTORE/paxstore-openapi-java-sdk
[CVE-2021-4104] - GitHub: https://github.com/Qualys/log4jscanwin
[CVE-2021-4104] - GitHub: https://github.com/TheInterception/Log4JPentester
[CVE-2021-4104: Automated pentesting tools and vulnerability fixes for Log4Shell CVE-2021-44228 / ...] - GitHub: https://github.com/TheInterception/Log4J-Simulation-Tool
[CVE-2021-4104: Vulerability analysis, patch management and exploitation tool CVE-2021-44228 / ...] - GitHub: https://github.com/apache/logging-log4j1
[CVE-2021-4104] - GitHub: https://github.com/cckuailong/log4shell_1.x
[CVE-2021-4104: Log4j 1.x RCE Poc -- CVE-2021-4104] - GitHub: https://github.com/davejwilson/azure-spark-pools-log4j
[CVE-2021-4104] - GitHub: https://github.com/logpresso/CVE-2021-44228-Scanner
[CVE-2021-4104] - GitHub: https://github.com/ltslog/ltslog
[CVE-2021-4104] - GitHub: https://github.com/open-AIMS/log4j
[CVE-2021-4104: Log4j version 1.2.17 without the offending class responsible for CVE-2021-4104.] - GitHub: https://github.com/srhercules/log4j_mass_scanner
[CVE-2021-4104] - GitHub: https://github.com/syslog-ng/syslog-ng
[CVE-2021-4104] - GitHub: https://github.com/thl-cmk/CVE-log4j-check_mk-plugin
[CVE-2021-4104] - GitHub: https://github.com/whitesource-ps/ws-bulk-report-generator
[CVE-2021-4104] - GitHub: https://github.com/whitesource/log4j-detect-distribution
[CVE-2021-4104] - GitHub: https://github.com/Schnitker/log4j-min
[CVE-2021-4104: Log4j 1.2 project, stripped of the additional appenders and CVEs that cause problems ...]
Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.
WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.
Risk Information
CVSS Score Source [?]: CVE-2021-4104
CVSS V2 Vector: AV:N/AC:M/Au:S/C:P/I:P/A:P/E:U/RL:OF/RC:C
CVSS Base Score: | 6.0 (Medium) |
Impact Subscore: | 6.4 |
Exploitability Subscore: | 6.8 |
CVSS Temporal Score: | 4.4 (Medium) |
CVSS Environmental Score: | NA (None) |
Modified Impact Subscore: | NA |
Overall CVSS Score: | 4.4 (Medium) |
CVSS Base Score: | 7.5 (High) |
Impact Subscore: | 5.9 |
Exploitability Subscore: | 1.6 |
CVSS Temporal Score: | 6.5 (Medium) |
CVSS Environmental Score: | NA (None) |
Modified Impact Subscore: | NA |
Overall CVSS Score: | 6.5 (Medium) |
STIG Risk Rating: High
Go back to menu.
Plugin Source
This is the apache_log4j_1_2.nasl nessus plugin source code. This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.
#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(156103);
script_version("1.9");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");
script_cve_id("CVE-2021-4104");
script_xref(name:"IAVA", value:"2021-A-0573");
script_xref(name:"IAVA", value:"0001-A-0650");
script_name(english:"Apache Log4j 1.2 JMSAppender Remote Code Execution (CVE-2021-4104)");
script_set_attribute(attribute:"synopsis", value:
"A package installed on the remote host is affected by a remote code execution vulnerability.");
script_set_attribute(attribute:"description", value:
"The version of Apache Log4j on the remote host is 1.2. It is, therefore, affected by a remote code execution
vulnerability when specifically configured to use JMSAppender.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
# https://github.com/apache/logging-log4j2/pull/608#issuecomment-990494126
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?33485eac");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-4104");
script_set_attribute(attribute:"solution", value:
"Upgrade to Apache Log4j version 2.16.0 or later since 1.x is end of life.
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.");
script_set_attribute(attribute:"agent", value:"all");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-4104");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/12/14");
script_set_attribute(attribute:"patch_publication_date", value:"2021/12/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/12/15");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:apache:log4j");
script_set_attribute(attribute:"stig_severity", value:"I");
script_set_attribute(attribute:"thorough_tests", value:"true");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Misc.");
script_copyright(english:"This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("apache_log4j_nix_installed.nbin", "apache_log4j_win_installed.nbin");
script_require_keys("installed_sw/Apache Log4j");
exit(0);
}
include('vcf.inc');
var app = 'Apache Log4j';
var app_info = vcf::get_app_info(app:app);
if (app_info['JMSAppender.class association'] == "Not Found")
audit(AUDIT_OS_CONF_NOT_VULN, app, app_info.version);
var constraints = [{ 'min_version':'1.2.0', 'max_version':'1.2.17', 'fixed_version':'2.16.0' }];
vcf::check_version_and_report(
app_info:app_info,
constraints:constraints,
severity:SECURITY_WARNING
);
The latest version of this script can be found in these locations depending on your platform:
- Linux / Unix:
/opt/nessus/lib/nessus/plugins/apache_log4j_1_2.nasl
- Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\apache_log4j_1_2.nasl
- Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/apache_log4j_1_2.nasl
Go back to menu.
How to Run
Here is how to run the Apache Log4j 1.2 JMSAppender Remote Code Execution (CVE-2021-4104) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):
- Click to start a New Scan.
- Select Advanced Scan.
- Navigate to the Plugins tab.
- On the top right corner click to Disable All plugins.
- On the left side table select Misc. plugin family.
- On the right side table select Apache Log4j 1.2 JMSAppender Remote Code Execution (CVE-2021-4104) plugin ID 156103.
- Specify the target on the Settings tab and click to Save the scan.
- Run the scan.
Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.
Basic usage:
/opt/nessus/bin/nasl apache_log4j_1_2.nasl -t <IP/HOST>
Run the plugin with audit trail message on the console:
/opt/nessus/bin/nasl -a apache_log4j_1_2.nasl -t <IP/HOST>
Run the plugin with trace script execution written to the console (useful for debugging):
/opt/nessus/bin/nasl -T - apache_log4j_1_2.nasl -t <IP/HOST>
Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):
/opt/nessus/bin/nasl -K /tmp/state apache_log4j_1_2.nasl -t <IP/HOST>
Go back to menu.
References
IAVA | Information Assurance Vulnerability Alert:
- 0001-A-0650, 2021-A-0573
- https://www.tenable.com/plugins/nessus/156103
- https://access.redhat.com/security/cve/CVE-2021-4104
- http://www.nessus.org/u?33485eac
- https://vulners.com/nessus/APACHE_LOG4J_1_2.NASL
- 156871 - Amazon Linux AMI : log4j (ALAS-2022-1562)
- 158832 - AlmaLinux 8 : parfait:0.5 (ALSA-2022:0290)
- 156240 - CentOS 7 : log4j (CESA-2021:5206)
- 157261 - Debian DLA-2905-1 : apache-log4j1.2 - LTS security update
- 158462 - EulerOS 2.0 SP5 : log4j (EulerOS-SA-2022-1276)
- 156276 - openSUSE 15 Security Update : log4j12 (openSUSE-SU-2021:1612-1)
- 156340 - openSUSE 15 Security Update : kafka (openSUSE-SU-2021:1631-1)
- 156177 - openSUSE 15 Security Update : log4j (openSUSE-SU-2021:4111-1)
- 156181 - openSUSE 15 Security Update : log4j12 (openSUSE-SU-2021:4112-1)
- 158150 - openSUSE 15 Security Update : kafka (openSUSE-SU-2022:0038-1)
- 156206 - Oracle Linux 7 : log4j (ELSA-2021-5206)
- 157159 - Oracle Linux 8 : parfait:0.5 (ELSA-2022-0290)
- 157137 - Oracle Linux 6 : log4j (ELSA-2022-9056)
- 157127 - Oracle WebLogic Server (Jan 2022 CPU)
- 156201 - RHEL 6 : log4j (RHSA-2021:5206)
- 156261 - RHEL 7 : rh-maven36-log4j12 (RHSA-2021:5269)
- 157904 - RHEL 8 : parfait:0.5 (RHSA-2022:0290)
- 157376 - RHEL 8 : Red Hat JBoss Enterprise Application Platform 7.4 (RHSA-2022:0436)
- 157374 - RHEL 7 : Red Hat JBoss Enterprise Application Platform 6.4 (RHSA-2022:0438)
- 157418 - RHEL 7 : Red Hat Single Sign-On 7.5.1 security update on RHEL 7 (Important) (RHSA-2022:0447)
- 157455 - RHEL 8 : Red Hat Single Sign-On 7.5.1 security update on RHEL 8 (Important) (RHSA-2022:0448)
- 157854 - RHEL 8 : RHV Manager (ovirt-engine) security update [ovirt-4.4.10-1] (Low) (RHSA-2022:0475)
- 158057 - RHEL 7 : Red Hat JBoss Web Server 3.1 Service Pack 14 Security Update (Low) (RHSA-2022:0524)
- 159653 - RHEL 7 : Red Hat JBoss Enterprise Application Platform 7.4.4 (RHSA-2022:1296)
- 159664 - RHEL 8 : Red Hat JBoss Enterprise Application Platform 7.4.4 (RHSA-2022:1297)
- 159006 - Scientific Linux Security Update : log4j on SL6.x, SL7.x i686/x86_64 (2021:5206)
- 156167 - SUSE SLES11 Security Update : log4j (SUSE-SU-2021:14866-1)
- 156169 - SUSE SLES15 Security Update : log4j (SUSE-SU-2021:4111-1)
- 156172 - SUSE SLED15 / SLES15 Security Update : log4j12 (SUSE-SU-2021:4112-1)
- 156170 - SUSE SLED12 / SLES12 Security Update : log4j (SUSE-SU-2021:4115-1)
- 156712 - Ubuntu 18.04 LTS / 20.04 LTS / 21.04 / 21.10 : Apache Log4j 1.2 vulnerability (USN-5223-1)
Version
This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file apache_log4j_1_2.nasl version 1.9. For more plugins, visit the Nessus Plugin Library.
Go back to menu.