acFTP Authentication Issue

2007.11.02
Risk: High
Local: No
Remote: Yes
CWE: N/A


Ogólna skala CVSS: 10/10
Znaczenie: 10/10
Łatwość wykorzystania: 10/10
Wymagany dostęp: Zdalny
Złożoność ataku: Niska
Autoryzacja: Nie wymagana
Wpływ na poufność: Pełny
Wpływ na integralność: Pełny
Wpływ na dostępność: Pełny

acFTP is an open-source FTP daemon for Windows platforms (http://www.sourceforge.net/projects/acftp) that offers more functionality than many proprietary servers (including the MS FTP service). The authentication code of acFTP contains a flaw -- specifically, the server treats users as logged in without a valid password. This results in mis-representation of server activity in log files, and possibly privilege elevation. For example: USER private PASS # This leads it to reject my password, but I can not log in with another set of credentials, and my log activity appears as "private" instead of the appropriate "-" or "***".


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