Linux with Apache Web server could allow an attacker to determine if a specified username exists
| linux-apache-username-exists (7129) |  Low Risk |
Description:
Multiple Linux distributions with Apache HTTP Server installed could allow a remote attacker to determine valid usernames on the system. When a request is made for a user's default home page, one of three messages is displayed depending on whether the specified username exists and has a home page configured or not configured, or the username does not exist on the system at all. A remote attacker can use this vulnerability to determine valid usernames on the system that can be used to launch further attacks.
Consequences:
Obtain Information
Remedy:
No remedy available as of July 9, 2011.
References:
- BugTraq Mailing List, Thu Sep 13 2001 - 13:08:09 CDT: Re: Is there user Anna at your host ?.
- BugTraq Mailing List, Wed Sep 12 2001 - 09:17:41 CDT: Is there user Anna at your host ?.
- BugTraq Mailing List, Wed Sep 12 2001 - 11:52:28 CDT: RE: Is there user Anna at your host ?.
- Vuln-Dev Mailing List, 2000-07-07 10:26:24: (no subject).
- Vuln-Dev Mailing List, 2000-07-07 13:26:04: Re: your mail.
- BID-3335: Red Hat Linux Apache Remote Username Enumeration Vulnerability
- CVE-2001-1013: Apache on Red Hat Linux with with the UserDir directive enabled generates different error codes when a username exists and there is no public_html directory and when the username does not exist, which could allow remote attackers to determine valid usernames on the server.
Platforms Affected:
- Apache HTTP Server
- RedHat Linux 7
Reported:
Sep 12, 2001
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