Apache 2.4.49 < 2.4.51 Path Traversal Vulnerability - Nessus

Critical Plugin ID: 153952

This page contains detailed information about the Apache 2.4.49 < 2.4.51 Path Traversal Vulnerability Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

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Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 153952
Name: Apache 2.4.49 < 2.4.51 Path Traversal Vulnerability
Filename: apache_2_4_51.nasl
Vulnerability Published: 2021-10-07
This Plugin Published: 2021-10-08
Last Modification Time: 2022-04-11
Plugin Version: 1.10
Plugin Type: combined
Plugin Family: Web Servers
Dependencies: apache_httpd_win_installed.nbin, apache_http_server_nix_installed.nbin, apache_http_version.nasl
Required KB Items [?]: installed_sw/Apache

Vulnerability Information

Severity: Critical
Vulnerability Published: 2021-10-07
Patch Published: 2021-10-07
CVE [?]: CVE-2021-42013
CPE [?]: cpe:/a:apache:httpd, cpe:/a:apache:http_server

Synopsis

The remote web server is affected by a vulnerability.

Description

The version of Apache httpd installed on the remote host is 2.4.49 prior to 2.4.51. It is, therefore, affected by a vulnerability as referenced in the 2.4.51 advisory.

- It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. (CVE-2021-42013)

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

Solution

Upgrade to Apache version 2.4.51 or later.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (Metasploit Framework, Exploit-DB, GitHub, D2 Elliot)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the Apache 2.4.49 < 2.4.51 Path Traversal Vulnerability vulnerability:

Metasploit: auxiliary/scanner/http/apache_normalize_path
[Apache 2.4.49/2.4.50 Traversal RCE]
Metasploit: exploit/multi/http/apache_normalize_path_rce
[Apache 2.4.49/2.4.50 Traversal RCE]
Metasploit: auxiliary/scanner/http/apache_normalize_path
[Apache 2.4.49/2.4.50 Traversal RCE scanner]
Exploit-DB: exploits/multiple/webapps/50406.sh
[EDB-50406: Apache HTTP Server 2.4.50 - Path Traversal & Remote Code Execution (RCE)]
Exploit-DB: exploits/multiple/webapps/50446.sh
[EDB-50446: Apache HTTP Server 2.4.50 - Remote Code Execution (RCE) (2)]
Exploit-DB: exploits/multiple/webapps/50512.py
[EDB-50512: Apache HTTP Server 2.4.50 - Remote Code Execution (RCE) (3)]
GitHub: https://github.com/0day666/Vulnerability-verification
[CVE-2021-42013]
GitHub: https://github.com/Adash7/CVE-2021-42013
[CVE-2021-42013]
GitHub: https://github.com/BincangSiber/CVE-2021-42013
[CVE-2021-42013]
GitHub: https://github.com/CHYbeta/Vuln100Topics20
[CVE-2021-42013]
GitHub: https://github.com/CalfCrusher/Path-traversal-RCE-Apache-2.4.49-2.4.50-Exploit
[CVE-2021-42013: CVE-2021-41773]
GitHub: https://github.com/FDlucifer/firece-fish
[CVE-2021-42013]
GitHub: https://github.com/H0j3n/EzpzCheatSheet
[CVE-2021-42013]
GitHub: https://github.com/H0j3n/EzpzShell
[CVE-2021-42013]
GitHub: https://github.com/LayarKacaSiber/CVE-2021-42013
[CVE-2021-42013]
GitHub: https://github.com/Ls4ss/CVE-2021-41773_CVE-2021-42013
[CVE-2021-42013]
GitHub: https://github.com/Mr-xn/Penetration_Testing_POC
[CVE-2021-42013]
GitHub: https://github.com/Shadow-warrior0/Apache_path_traversal
[CVE-2021-42013]
GitHub: https://github.com/Zeop-CyberSec/apache_normalize_path
[CVE-2021-42013]
GitHub: https://github.com/ahmad4fifz/CVE-2021-41773
[CVE-2021-42013]
GitHub: https://github.com/asaotomo/CVE-2021-42013-Apache-RCE-POC-EXP
[CVE-2021-42013: Apache HTTP ...]
GitHub: https://github.com/asaotomo/CVE-2021-42013-Apache-RCE-Poc-Exp
[CVE-2021-42013: Apache 远程代码执行（CVE-2021-42013）批量检测工具：Apache HTTP ...]
GitHub: https://github.com/cryst4lliz3/CVE-2021-42013
[CVE-2021-42013]
GitHub: https://github.com/honypot/CVE-2021-42013
[CVE-2021-42013]
GitHub: https://github.com/ibrahimetecicek/Advent-of-Cyber-3-2021-
[CVE-2021-42013]
GitHub: https://github.com/im-hanzou/apachrot
[CVE-2021-42013]
GitHub: https://github.com/jas9reet/CVE-2021-42013-LAB
[CVE-2021-42013: Apache HTTP Server 2.4.50 - RCE Lab]
GitHub: https://github.com/ksanchezcld/httpd-2.4.49
[CVE-2021-42013]
GitHub: https://github.com/ltfafei/my_POC
[CVE-2021-42013]
GitHub: https://github.com/mr-exo/CVE-2021-41773
[CVE-2021-42013]
GitHub: https://github.com/pisut4152/Sigma-Rule-for-CVE-2021-41773-and-CVE-2021-42013-exploitation-attempt
[CVE-2021-42013]
GitHub: https://github.com/rnsss/CVE-2021-42013
[CVE-2021-42013: CVE-2021-42013-exp]
GitHub: https://github.com/simon242/CVE-2021-42013
[CVE-2021-42013]
GitHub: https://github.com/tangxiaofeng7/CVE-2022-22947-Spring-Cloud-Gateway
[CVE-2021-42013: CVE-2021-42013批量]
GitHub: https://github.com/twseptian/CVE-2021-41773
[CVE-2021-42013]
GitHub: https://github.com/twseptian/CVE-2021-42013-Lab
[CVE-2021-42013: Docker container lab to play/learn with CVE-2021-42013]
GitHub: https://github.com/twseptian/cve-2021-42013-docker-lab
[CVE-2021-42013: Docker container lab to play/learn with CVE-2021-42013]
GitHub: https://github.com/vulf/CVE-2021-41773_42013
[CVE-2021-42013]
GitHub: https://github.com/walnutsecurity/CVE-2021-42013
[CVE-2021-42013: cve-2021-42013.py is a python script that will help in finding Path Traversal or ...]
GitHub: https://github.com/wangfly-me/Apache_Penetration_Tool
[CVE-2021-42013: CVE-2021-41773&CVE-2021-42013]
GitHub: https://github.com/xMohamed0/CVE-2021-42013-ApacheRCE
[CVE-2021-42013]
GitHub: https://github.com/5gstudent/cve-2021-41773-and-cve-2021-42013
[CVE-2021-42013: cve-2021-41773 即 cve-2021-42013 批量检测脚本]
GitHub: https://github.com/ahmad4fifz/CVE-2021-42013
[CVE-2021-42013: CVE-2021-41773 on Docker]
GitHub: https://github.com/andrea-mattioli/apache-exploit-CVE-2021-42013
[CVE-2021-42013: Exploit with integrated shodan search]
GitHub: https://github.com/corelight/CVE-2021-41773
[CVE-2021-42013: A Zeek package which raises notices for Path Traversal/RCE in Apache HTTP Server ...]
GitHub: https://github.com/Hydragyrum/CVE-2021-41773-Playground
[CVE-2021-42013: Some docker images to play with CVE-2021-41773 and CVE-2021-42013]
GitHub: https://github.com/IcmpOff/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution-Exploit
[CVE-2021-42013: This Metasploit module exploits an unauthenticated remote code execution ...]
GitHub: https://github.com/inbug-team/CVE-2021-41773_CVE-2021-42013
[CVE-2021-42013: CVE-2021-41773 CVE-2021-42013漏洞批量检测工具]
GitHub: https://github.com/mauricelambert/CVE-2021-42013
[CVE-2021-42013: These Nmap, Python and Ruby scripts detects and exploits CVE-2021-42013 with RCE and ...]
GitHub: https://github.com/MrCl0wnLab/SimplesApachePathTraversal
[CVE-2021-42013: Tool check: CVE-2021-41773, CVE-2021-42013, CVE-2020-17519]
GitHub: https://github.com/robotsense1337/CVE-2021-42013
[CVE-2021-42013: Exploit Apache 2.4.50(CVE-2021-42013)]
GitHub: https://github.com/TheLastVvV/CVE-2021-42013_Reverse-Shell
[CVE-2021-42013: PoC CVE-2021-42013 reverse shell Apache 2.4.50 with CGI]
GitHub: https://github.com/theLSA/apache-httpd-path-traversal-checker
[CVE-2021-42013: apache httpd path traversal checker(CVE-2021-41773 / CVE-2021-42013)]
GitHub: https://github.com/twseptian/CVE-2021-42013-Docker-Lab
[CVE-2021-42013: Docker container lab to play/learn with CVE-2021-42013]
GitHub: https://github.com/Vulnmachines/cve-2021-42013
[CVE-2021-42013: Apache 2.4.50 Path traversal vulnerability]
GitHub: https://github.com/walnutsecurity/cve-2021-42013
[CVE-2021-42013: Cve-2021-42013.py is a python script that will help in finding Path Traversal or ...]
D2 Elliot: apache_2.4.50_rce.html
[Apache 2.4.50 RCE]

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-2021-42013
CVSS V2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P/E:H/RL:OF/RC:C

CVSS Base Score:	7.5 (High)
Impact Subscore:	6.4
Exploitability Subscore:	10.0
CVSS Temporal Score:	6.5 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.5 (Medium)

CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CVSS Base Score:	9.8 (Critical)
Impact Subscore:	5.9
Exploitability Subscore:	3.9
CVSS Temporal Score:	9.4 (Critical)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	9.4 (Critical)

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Plugin Source

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(153952);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");

  script_cve_id("CVE-2021-42013");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2021/11/17");

  script_name(english:"Apache 2.4.49 < 2.4.51 Path Traversal Vulnerability");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Apache httpd installed on the remote host is 2.4.49 prior to 2.4.51. It is, therefore, affected by a
vulnerability as referenced in the 2.4.51 advisory.

  - It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient. An attacker could use a
    path traversal attack to map URLs to files outside the directories configured by Alias-like directives.
    (CVE-2021-42013)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://httpd.apache.org/security/vulnerabilities_24.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Apache version 2.4.51 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-42013");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"d2_elliot_name", value:"Apache 2.4.50 RCE");
  script_set_attribute(attribute:"exploit_framework_d2_elliot", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Apache 2.4.49/2.4.50 Traversal RCE');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/10/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/10/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/10/08");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:apache:httpd");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:apache:http_server");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Web Servers");

  script_copyright(english:"This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("apache_http_version.nasl", "apache_http_server_nix_installed.nbin", "apache_httpd_win_installed.nbin");
  script_require_keys("installed_sw/Apache");

  exit(0);
}

include('vcf.inc');
include('vcf_extras.inc');

var app_info = vcf::apache_http_server::combined_get_app_info(app:'Apache');

var constraints = [
  { 'min_version' : '2.4.49', 'fixed_version' : '2.4.51' }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);

The latest version of this script can be found in these locations depending on your platform:

Linux / Unix:
/opt/nessus/lib/nessus/plugins/apache_2_4_51.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\apache_2_4_51.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/apache_2_4_51.nasl

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How to Run

Here is how to run the Apache 2.4.49 < 2.4.51 Path Traversal Vulnerability 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 Web Servers plugin family.
On the right side table select Apache 2.4.49 < 2.4.51 Path Traversal Vulnerability plugin ID 153952.
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_2_4_51.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a apache_2_4_51.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - apache_2_4_51.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_2_4_51.nasl -t <IP/HOST>

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References

See also:

Similar and related Nessus plugins:

154179 - Amazon Linux 2 : httpd (ALAS-2021-1716)
154188 - Amazon Linux AMI : httpd24 (ALAS-2021-1543)
155600 - Apache HTTP Server 2.4.49 & 2.4.50 Path Traversal (CVE-2021-42013)
153983 - FreeBSD : Apache httpd -- Path Traversal and Remote Code Execution (d001c189-2793-11ec-8fb1-206a8a720317)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file apache_2_4_51.nasl version 1.10. For more plugins, visit the Nessus Plugin Library.

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Apache 2.4.49 < 2.4.51 Path Traversal Vulnerability - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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