Bugtraq mailing list archives
Re: bug in ssh allowing to be invissible
From: shipley () KPMG COM (Pete)
Date: Tue, 20 Apr 1999 12:07:44 -0700
Sorry, but maybe i'll resend this email (I was very sleepy while writing prev leter). Hi, I have just discoverd that there is a bug in sshd allowing ordinary user to be showed as not logged in while logged in. You should simply ssh to remote host and run command "bash". One that's not so good, is that you will not have the controlling terminal, but ...
This is not a new bug, in fact it is not even a bug.. (feature?) since you are not really logged in. Rsh and several simular programs exhibit the exact same behavior and have so since they were introduced a decade and a half ago in 4.2 BSD. Note that Sshd still logs the connection to syslog (or how ever you have it configured to log on your system). Mind you that the only thing that is not being logged is are entries in utmp/wtmp, these files should not be relied on or trusted in the first place since it is prone to having errors and "ghost" entries. (some systems may system leave it world writable) -Pete
Current thread:
- Re: Plain text passwords--necessary Francisco M. Marzoa Alonso (Apr 16)
- <Possible follow-ups>
- Re: Plain text passwords--necessary Aleph One (Apr 16)
- Re: Plain text passwords--necessary Phillip Vandry (Apr 19)
- Corrected Linux 2.2.5 FIN/NULL/XMAS block patch Taral (Apr 19)
- Re: Corrected Linux 2.2.5 FIN/NULL/XMAS block patch Taral (Apr 20)
- Re: Plain text passwords--necessary Taral (Apr 19)
- Re: Plain text passwords--necessary Phillip Vandry (Apr 19)
- Re: Plain text passwords--necessary Trevor Schroeder (Apr 19)
- bug in ssh allowing to be invissible Grzegorz Stelmaszek (Apr 19)
- Re: bug in ssh allowing to be invissible Pete (Apr 20)
- Re: bug in ssh allowing to be invissible Joe Gross (Apr 20)
- NetBSD Security Advisory 1999-009 matthew green (Apr 20)
- Bash Bug Shadow (Apr 20)
- Re: Bash Bug Marc Lehmann (Apr 21)
- Re: Bash Bug Pavel Kankovsky (Apr 22)
- Re: Bash Bug Chet Ramey (Apr 22)
- L0pht Security Advisory: Cold Fusion App Server Weld Pond (Apr 21)
- Re: Plain text passwords--necessary Densin Roy. (Apr 19)
- Re: Plain text passwords--necessary Daniel Alex Finkelstein (Apr 19)
- AOL Instant Messenger URL Crash Adam Brown (Apr 19)