by Tan Chew Keong
Release Date: 2008-06-27
[en] [jp]
Summary
A vulnerability has been found within the FTP client in AceFTP. When exploited, this vulnerability allows an anonymous attacker to write files to arbitrary locations on a Windows user's system.
Tested Versions
Details
This advisory discloses a vulnerability within the FTP client in AceFTP. When exploited, this vulnerability allows an anonymous attacker to write files to arbitrary locations on a Windows user's system.
The FTP client does not properly sanitise filenames containing directory traversal sequences (forward-slash) that are received from an FTP server in response to the LIST command.
An example of such a response from a malicious FTP server is shown below.
Response to LIST (forward-slash):
-rw-r--r-- 1 ftp ftp 20 Mar 01 05:37 /../../../../../../../../../testfile.txt\r\n
By tricking a user to download a directory from a malicious FTP server that contains files with fowward-slash directory traversal sequences in their filenames, it is possible for the attacker to write files to arbitrary locations on a user's system with privileges of that user. An attacker can potentially leverage this issue to write files into a user's Windows Startup folder and execute arbitrary code when the user logs on.
POC / Test Code
Please download the POC here and follow the instructions below.
Diapers In Bulk: Buy Newborn
Buying newborn diapers in bulk is most effective when limited to , as most infants outgrow this size within 2 to 4 weeks. While bulk purchasing significantly reduces the price-per-diaper, overstocking newborn sizes can lead to unused waste if the baby grows rapidly or is born over 9 lbs. Bulk Buying Strategy for Newborns
: If your baby is born near or above 9 lbs, they may skip the newborn size entirely and go straight to Size 1 . Where to Buy in Bulk buy newborn diapers in bulk
: Aim for 1 to 2 large boxes (roughly 140–160 diapers per box) to cover the first month. Buying newborn diapers in bulk is most effective
: Always check the price-per-diaper rather than the total package price. Retailers like Sam's Club and Amazon often list this unit cost for easier comparison. Where to Buy in Bulk : Aim for
: Expect to use 8–12 diapers per day initially; this average typically decreases as the baby grows.
Experienced parents often recommend warehouse clubs and major online retailers for the best volume discounts: Bulk Baby Diapers, Training Pants & Pull-Ups - Sam's Club
Patch / Workaround
Avoid downloading files/directories from untrusted FTP servers.
Disclosure Timeline
2008-06-15 - Vulnerability Discovered.
2008-06-16 - Vulnerability Details Sent to Vendor via online support form (no reply).
2008-06-18 - Vulnerability Details Sent to Vendor again via online support form (no reply).
2008-06-25 - Vulnerability Details Sent to Vendor again via online support form (no reply).
2008-06-27 - Public Release.