Bugtraq mailing list archives
RH 6.0 shadow passwords and locking users bug
From: princectrl () ROCKETMAIL COM (Prince Ctrl)
Date: Mon, 30 Aug 1999 14:07:35 -0700
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
Current thread:
- RH 6.0 shadow passwords and locking users bug Prince Ctrl (Aug 30)
- Re: RH 6.0 shadow passwords and locking users bug Shuman (Sep 01)
- Re: RH 6.0 shadow passwords and locking users bug Walter Klomp (Sep 04)
- SECURITY: RHSA-1999:033 Buffer overflow problem in the inews program Cristian Gafton (Sep 01)
- Re: RH 6.0 shadow passwords and locking users bug bandregg () REDHAT COM (Sep 02)
- <Possible follow-ups>
- Re: RH 6.0 shadow passwords and locking users bug Alex Alvarez (Sep 06)
- Re: RH 6.0 shadow passwords and locking users bug Prince Ctrl (Sep 09)
- Re: RH 6.0 shadow passwords and locking users bug Shuman (Sep 01)