Vulnerability Name:

CCN-11918

Published:2003-05-04
Updated:2003-05-04
Summary:Microsoft Internet Information Server (IIS) could allow a remote attacker to obtain valid usernames. If a remote attacker attempts to login with various usernames, the login error messages would either state "The user name could not be found", if the username is invalid or "The specified network password is not correct", if the username is valid. An attacker could use this vulnerability to generate a list of valid usernames, and then use brute force techniques to find a valid password to gain access to the system.
CVSS v3 Severity:5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
Vulnerability Consequences:Obtain Information
References:Source: CCN
Type: BugTraq Mailing List, Sat May 03 2003 - 02:58:08 CDT
Microsoft IIS Authentication Manager Account Conformation Vuln?

Source: CCN
Type: BID-7492
Microsoft IIS User Existence Disclosure Vulnerability

Source: XF
Type: UNKNOWN
iis-authentication-username-disclosure(11918)

Vulnerable Configuration:Configuration CCN 1:
  • cpe:/a:microsoft:internet_information_server:*:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    BACK
    microsoft internet information server *