LeapFTP .lsq Buffer Overflow Vulnerability by Sowhat Last Update:2005.08.24 http://secway.org/advisory/AD20050824.txt Vendor: LeapWare Inc. Product Affected: LeapFTP < 2.7.6.612 Overview: LeapFTP is the award-winning shareware FTP client that combines an intuitive interface with one of the most powerful client bases around. Details: .LSQ is the LeapFTP Site Queue file, And it is registered with Windows by LeapFTP. You can save a transfer Queue to .lsq files and transfer it later by opening the .lsq files. However, LeapFTP does not properly check the length of the "Host" fields, when a overly long string is supplied, there will be a buffer overflow and probably arbitrary code execution. This vulnerability can be exploited by sending the malformed .lsq file to the victim, after the victim open the .lsq file, arbitray code may executed. //bof.lsq [HOSTINFO] HOST=AAAAA...[ long string ]...AAAAA USER=username PASS=password [FILES] "1","/winis/ApiList.zip","477,839","E:\ApiList.zip" SOLUTION: All users are encouraged to upgrade to 2.7.6 immediately Vendor also released an advisory: http://www.leapware.com/security/2005082301.txt Vendor Response: 2005.08.22 Vendor notified via online WebForm 2005.08.23 Vendor responsed and bug fixed 2005.08.24 Vendor released the new version 2.7.6.612 2005.08.24 Advisory Released
