Vulnerabilities > CVE-2017-6516 - Improper Input Validation vulnerability in Magnicomp Sysinfo 10H62
Attack vector
LOCAL Attack complexity
LOW Privileges required
NONE Confidentiality impact
COMPLETE Integrity impact
COMPLETE Availability impact
COMPLETE Summary
A Local Privilege Escalation Vulnerability in MagniComp's Sysinfo before 10-H64 for Linux and UNIX platforms could allow a local attacker to gain elevated privileges. Parts of SysInfo require setuid-to-root access in order to access restricted system files and make restricted kernel calls. This access could be exploited by a local attacker to gain a root shell prompt using the right combination of environment variables and command line arguments.
Vulnerable Configurations
Part | Description | Count |
---|---|---|
Application | 1 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Server Side Include (SSI) Injection An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
- Cross Zone Scripting An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
- Cross Site Scripting through Log Files An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
- Command Line Execution through SQL Injection An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
Exploit-Db
description | MagniComp SysInfo - mcsiwrapper Privilege Escalation (Metasploit). CVE-2017-6516. Local exploit for Multiple platform. Tags: Metasploit Framework (MSF) |
file | exploits/multiple/local/44150.rb |
id | EDB-ID:44150 |
last seen | 2018-02-20 |
modified | 2018-02-20 |
platform | multiple |
port | |
published | 2018-02-20 |
reporter | Exploit-DB |
source | https://www.exploit-db.com/download/44150/ |
title | MagniComp SysInfo - mcsiwrapper Privilege Escalation (Metasploit) |
type | local |
Metasploit
description | This module attempts to gain root privileges on systems running MagniComp SysInfo versions prior to 10-H64. The .mcsiwrapper suid executable allows loading a config file using the '--configfile' argument. The 'ExecPath' config directive is used to set the executable load path. This module abuses this functionality to set the load path resulting in execution of arbitrary code as root. This module has been tested successfully with SysInfo version 10-H63 on Fedora 20 x86_64, 10-H32 on Fedora 27 x86_64, 10-H10 on Debian 8 x86_64, and 10-GA on Solaris 10u11 x86. |
id | MSF:EXPLOIT/MULTI/LOCAL/MAGNICOMP_SYSINFO_MCSIWRAPPER_PRIV_ESC |
last seen | 2020-06-08 |
modified | 2019-11-03 |
published | 2018-02-05 |
references |
|
reporter | Rapid7 |
source | https://github.com/rapid7/metasploit-framework/blob/master//modules/exploits/multi/local/magnicomp_sysinfo_mcsiwrapper_priv_esc.rb |
title | MagniComp SysInfo mcsiwrapper Privilege Escalation |
Nessus
NASL family | Misc. |
NASL id | MAGNICOMP_SYSINFO_CVE-2017-6516.NASL |
description | The version of MagniComp SysInfo installed on the remote host is prior to 10-H64. It is, therefore, affected by a privilege escalation vulnerability. Note that Nessus has not tested for this issue but has instead relied only on the application |
last seen | 2020-06-01 |
modified | 2020-06-02 |
plugin id | 117705 |
published | 2018-09-25 |
reporter | This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. |
source | https://www.tenable.com/plugins/nessus/117705 |
title | MagniComp SysInfo Privilege Escalation Vulnerability (Linux/UNIX) |
Packetstorm
data source https://packetstormsecurity.com/files/download/148241/magnicompsysinfo-disclose.txt id PACKETSTORM:148241 last seen 2018-06-20 published 2018-06-18 reporter Harry Sintonen source https://packetstormsecurity.com/files/148241/MagniComp-SysInfo-Information-Exposure.html title MagniComp SysInfo Information Exposure data source https://packetstormsecurity.com/files/download/146490/magnicomp_sysinfo_mcsiwrapper_priv_esc.rb.txt id PACKETSTORM:146490 last seen 2018-02-21 published 2018-02-20 reporter Brendan Coles source https://packetstormsecurity.com/files/146490/MagniComp-SysInfo-mcsiwrapper-Privilege-Escalation.html title MagniComp SysInfo mcsiwrapper Privilege Escalation
References
- http://www.magnicomp.com/support/cve/CVE-2017-6516.shtml
- http://www.securityfocus.com/bid/96934
- https://labs.mwrinfosecurity.com/advisories/magnicomps-sysinfo-root-setuid-local-privilege-escalation-vulnerability/
- https://labs.mwrinfosecurity.com/advisories/multiple-vulnerabilities-in-magnicomps-sysinfo-root-setuid/
- https://www.exploit-db.com/exploits/44150/