.:: SUMMARY Novell iChain Mini FTP Server Valid User Disclosure Vulnerability Version: IChain Version v2.3, It is suspected that all previous versions of IChain are vulnerable. .:: BACKGROUND The Novell iChain product provides identity-based web security services that control access to application and network resources across technical and organizational boundaries. http://www.novell.com .:: DESCRIPTION Novell iChain Mini FTP Server inform when a username is invalid. Details: famato@infobyte:~$ telnet 10.1.10.1 21 Trying 10.1.10.1... Connected to 10.1.10.1. Escape character is '^]'. 220 Service Ready user test 530 Invalid user name user config 331 User name Okay, need password .:: WORKAROUND [ISR] Infobyte Security Research is currently unaware of any effective workarounds for this vulnerability. .:: DISCLOSURE TIMELINE 03/04/2005 Initial vendor notification 03/05/2005 Initial vendor response 03/10/2005 Public disclosure .:: CREDIT Francisco Amato is credited with discovering this vulnerability. famato][at][infobyte][dot][com][dot][ar .:: LEGAL NOTICES Copyright (c) 2005 by [ISR] Infobyte Security Research. Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Infobyte Security Research Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from infobyte com ar Disclaimer The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.