Reflection for Secure IT Windows Server version 6.0 uses different case-sensitivity in evaluating the allow and deny lists as previous versions, potentionally allowing unintended access.
Reflection for Secure IT Windows Server version 6.0, an SSH server from WRQ formerly known as F-Secure SSH server, provides allow and deny lists of regular expressions to configure the set of accounts that should be able to access the host. Prior to 6.0, these regular expressions were evaluated in a case-insensitive manner. In 6.0, the regular expressions are evaluated in a case-sensitive manner, potentionally allowing an attacker to login to previously-denied accounts.
A remote attacker may be able to login to previously-denied accounts, if the attacker can authenticate to the account (e.g., he knows the account's password).
According to WRQ, version 6.0, build 24 of Reflection for Secure IT Windows Server evaluates allow and deny strings in a case-insensitive manner. This restores the prior behavior, but may result in usernames matching the allow list that did not match in prior builds of version 6.0.
Thanks to WRQ for reporting this issue.
This document was written by Hal Burch.
|Date First Published:||2005-08-31|
|Date Last Updated:||2005-09-01 15:29 UTC|