WFTPD 'RETR' and 'CWD' Buffer Overflow Vulnerability

BID:2644

Info

WFTPD 'RETR' and 'CWD' Buffer Overflow Vulnerability

Bugtraq ID: 2644
Class: Boundary Condition Error
CVE:
Remote: Yes
Local: No
Published: Apr 22 2001 12:00AM
Updated: Apr 22 2001 12:00AM
Credit: Discovered and posted to Bugtraq by Len Budney <[email protected]> on April 23, 2001.
Vulnerable: Texas Imperial Software WFTPD 3.0 0R4 Pro
- Microsoft Windows NT 4.0
 Texas Imperial Software WFTPD 3.0 0R4
- Microsoft Windows NT 4.0
Not Vulnerable: Texas Imperial Software WFTPD 3.0 0R5 Pro
- Microsoft Windows 2000 Professional
- Microsoft Windows NT 4.0
 Texas Imperial Software WFTPD 3.0 0R5
- Microsoft Windows 2000 Professional
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows ME
- Microsoft Windows NT 4.0

Discussion

WFTPD 'RETR' and 'CWD' Buffer Overflow Vulnerability

Invalid long strings submitted using either 'RETR' or 'CWD' commands to a host running WFTPD server, will result in the service terminating due to a buffer overflow. It may be possible for an attacker to execute arbitrary code through this vulnerability.

A restart of the server is required in order to gain normal functionality.

This vulnerability has been reported to exist on systems running Windows NT 4.0 with either SP3, SP4, or SP6 installed.

The problem exists due to the interaction between WFTPD.EXE and the Windows function call 'NTDLL.DLL:RtlFreeHeap()'.

Exploit / POC

WFTPD 'RETR' and 'CWD' Buffer Overflow Vulnerability

Len Budney <[email protected]> has provided the following exploit:

Solution / Fix

WFTPD 'RETR' and 'CWD' Buffer Overflow Vulnerability

Solution:
Texas Imperial Software has addressed this issue in WFTPD 3.00 R5 and 3.00 R5 Pro.


Texas Imperial Software WFTPD 3.0 0R4 Pro

Texas Imperial Software WFTPD 3.0 0R4

References

WFTPD 'RETR' and 'CWD' Buffer Overflow Vulnerability

References:

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