SSH protocol 2 (aka SSH-2) public key authentication in the development snapshot of OpenSSH 2.3.1, available from 2001-01-18 through 2001-02-08, does not perform a challenge-response step to ensure that the client has the proper private key, which allows remote attackers to bypass authentication as other users by supplying a public key from that user's authorized_keys file.

SQL-Ledger 2.4.4 through 2.6.17 authenticates users by verifying that the value of the sql-ledger-[username] cookie matches the value of the sessionid parameter, which allows remote attackers to gain access as any logged-in user by setting the cookie and the parameter to the same value.

security flaw

RIPd in Quagga 0.98 and 0.99 before 20060503 does not properly enforce RIPv2 authentication requirements, which allows remote attackers to modify routing state via RIPv1 RESPONSE packets.

Session fixation vulnerability in Jetbox CMS 2.1 SR1 allows remote attackers to hijack web sessions via a crafted link and the administrator section.

newsadmin.asp in Katy Whitton NewsCMSLite allows remote attackers to bypass authentication and gain administrative access by setting the loggedIn cookie to "xY1zZoPQ".

RealVNC 4.1.1, and other products that use RealVNC such as AdderLink IP and Cisco CallManager, allows remote attackers to bypass authentication via a request in which the client specifies an insecure security type such as "Type 1 - None", which is accepted even if it is not offered by the server, as originally demonstrated using a long password.

The default configuration of Oracle 9i Application Server 1.0.2.x allows remote anonymous users to access sensitive services without authentication, including Dynamic Monitoring Services (1) dms0, (2) dms/DMSDump, (3) servlet/DMSDump, (4) servlet/Spy, (5) soap/servlet/Spy, and (6) dms/AggreSpy; and Oracle Java Process Manager (7) oprocmgr-status and (8) oprocmgr-service, which can be used to control Java processes.

Microsoft Windows 2000 SP4 does not properly validate an RPC server during mutual authentication over SSL, which allows remote attackers to spoof an RPC server, aka the "RPC Mutual Authentication Vulnerability."

The embedded HTTP server in Fuji Xerox Printing Systems (FXPS) print engine, as used in products including (1) Dell 3000cn through 5110cn and (2) Fuji Xerox DocuPrint firmware before 20060628 and Network Option Card firmware before 5.13, does not properly perform authentication for HTTP requests, which allows remote attackers to modify system configuration via crafted requests, including changing the administrator password or causing a denial of service to the print server.

Netbus 1.5 through 1.7 allows more than one client to be connected at the same time, but only prompts the first connection for authentication, which allows remote attackers to gain access.

The web administration page for the Ericsson HM220dp ADSL modem does not require authentication, which could allow remote attackers to gain access from the LAN side.

functions.php in Ragnarok Online Control Panel (ROCP) 4.3.4a allows remote attackers to bypass authentication by requesting account_manage.php with a trailing "/login.php" PHP_SELF value, which is not properly handled by the CHECK_AUTH function.

Advantage Century Telecommunication (ACT) P202S IP Phone 1.01.21 running firmware 1.1.21 has multiple undocumented ports available, which (1) might allow remote attackers to obtain sensitive information, such as memory contents and internal operating-system data, by directly accessing the VxWorks WDB remote debugging ONCRPC (aka wdbrpc) on UDP 17185, (2) reflect network data using echo (TCP 7), or (3) gain access without authentication using rlogin (TCP 513).

eZ publish 3.4.4 through 3.7 before 20050722 applies certain permissions on the node level, which allows remote authenticated users to bypass the original permissions on embedded objects in XML fields and read these objects.

Session fixation vulnerability in Drupal 4.5.x before 4.5.8 and 4.6.x before 4.5.8 allows remote attackers to gain privileges by tricking a user to click on a URL that fixes the session identifier.

The make_password function in ipsclass.php in Invision Power Board (IPB) 2.1.4 uses random data generated from partially predictable seeds to create the authentication code that is sent by e-mail to a user with a lost password, which might make it easier for remote attackers to guess the code and change the password for an IPB account, possibly involving millions of requests.

In some cases, Service Pack 4 for Windows NT 4.0 can allow access to network shares using a blank password, through a problem with a null NT hash value.

Windows NT Terminal Server performs extra work when a client opens a new connection but before it is authenticated, allowing for a denial of service.

Windows NT does not properly download a system policy if the domain user logs into the domain with a space at the end of the domain name.

HTTP server for Cisco IOS 11.3 to 12.2 allows attackers to bypass authentication and execute arbitrary commands, when local authorization is being used, by specifying a high access level in the URL.