4270011 1999-09-02 00:59 /55 rader/ Postmaster Mottagare: Bugtraq (import) <7577> Ärende: RH 6.0 shadow passwords and locking users bug ------------------------------------------------------------ Approved-By: aleph1@SECURITYFOCUS.COM MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Message-ID: <19990830210735.27311.rocketmail@attach1.rocketmail.com> Date: Mon, 30 Aug 1999 14:07:35 -0700 Reply-To: Prince Ctrl <princectrl@ROCKETMAIL.COM> Sender: Bugtraq List <BUGTRAQ@SECURITYFOCUS.COM> From: Prince Ctrl <princectrl@ROCKETMAIL.COM> X-To: bugtraq@netspace.org To: BUGTRAQ@SECURITYFOCUS.COM Aleph, I do not know whether this has been reported to the list, so I thought I'd throw it out and see if anyone may know of a solution, and/or care to have a technical discussion concerning this bug. When administering a Red Hat 6.0 server and locking users with the 'passwd -l <user>' command, and then unlocking a user with the 'passwd -u <user>' command, a control character is added to the end of a users' encrypted password in the form of a "^Q" in the shadowed passwd file. In our tests, we have found that this only occurs once the user has been "unlocked". It happens whether you are using MD5 encryption or DES...it doesn't matter. I have forwarded this to our Sr. Systems Administrator who said he was going to contact Red Hat today. Confirmation of that call is unknown. OS affected/tested: Red Hat 6.0 Possible problem: It could either be the fact that the 'passwd' binary is actually adding ^Q to the end of a users encrypted password, or it may be something with the way pam is handling this. I know that pam has some .so files which deal with shadowed passwords, but I am no pam expert, so if anyone has some suggestions, corrections, etc., please inform me... Possible solution: Unknown If anyone has any ideas on how to fix this, please let me know... === PrinceC Security Administrator princectrl@rocketmail.com _________________________________________________________ DO YOU YAHOO!? Get your free @yahoo.com address at http://mail.yahoo.com (4270011) ----------------------------------- 4270087 1999-09-02 02:25 /34 rader/ Postmaster Mottagare: Bugtraq (import) <7579> Ärende: RH 6.0 shadowed users and user lock bug fix ------------------------------------------------------------ Approved-By: aleph1@SECURITYFOCUS.COM MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Message-ID: <19990830211950.28859.rocketmail@attach1.rocketmail.com> Date: Mon, 30 Aug 1999 14:19:50 -0700 Reply-To: Prince Ctrl <princectrl@ROCKETMAIL.COM> Sender: Bugtraq List <BUGTRAQ@SECURITYFOCUS.COM> From: Prince Ctrl <princectrl@ROCKETMAIL.COM> X-To: bugtraq@netspace.org To: BUGTRAQ@SECURITYFOCUS.COM Aleph, After confirming with our Sr. Systems Admin, RedHat was contacted and they confirmed that it was indeed a bug within 'passwd'. You can download the new version of passwd and it will fix this problem. http://people.redhat.com/~smooge/passwd-0.60-1.i386.rpm === PrinceC Security Administrator/Consultant princectrl@rocketmail.com _________________________________________________________ DO YOU YAHOO!? Get your free @yahoo.com address at http://mail.yahoo.com (4270087) -----------------------------------