Bugtraq mailing list archives
Re: About rpc.* programs and SIGUSR1 signal...
From: cdfrey () foursquare net (Chris Frey)
Date: Sat, 26 Sep 1998 12:21:40 -0400
On Fri, 25 Sep 1998, ga wrote:
Finally, this reminded me of an old DoS that I found long time ago but I never released it (sorry if it is already known). This was based on the same USR1 signal. When sendmail receives a SIGUSR1 signal, it dumps some infos in the /var/log/debug file. As sendmail is suid then it runs with root
[snip]
I tried this on sendmail 8.8.0 (as I told you above, it has been a longtime).
I checked my copies of sendmail-8.8.6 and sendmail-8.9.1 that I had available and it looks to me like it uses syslog to do the state dump on a SIGUSR1. I don't have 8.8.0 to check with, but perhaps syslog was setup to write LOG_DEBUGs to /var/log/debug? - Chris
Current thread:
- About rpc.* programs and SIGUSR1 signal... ga (Sep 25)
- Re: About rpc.* programs and SIGUSR1 signal... Chris Frey (Sep 26)