Bugtraq mailing list archives
Re: Anonymous Qmail Denial of Service
From: nick () ZETA ORG AU (Nick Andrew)
Date: Tue, 5 Jan 1999 09:48:55 +1100
In message <3.0.1.32.19990104013631.0092a770 () mail kics bc ca>, Trev writes:
Pardon my comments here, I am no qmail expert (I don't even run the thing), but surely you could get around this by applying a small patch to qmail-queue to look for such zero-length files and remove any that are found (ie: one of the first things it does).
Naively it sounds like a good idea. In practice though, there is a race condition between one instance of qmail-queue creating a file (at which point it has zero length) and another instance finding and removing the same, in-use file. Additional tests would have to be performed such as testing time-since-creation. Holistically however, this kind of "cleanup" offends my sense of the tao of system programming. Processes should not leave crud to be cleaned up by later, unrelated processes. Nick.
Current thread:
- Re: Breeze Network Server remote reboot and other bogosity. Mike Pelley (Dec 31)
- Bug Mr Spooty (Dec 31)
- Re: Bug Curt Sampson (Jan 03)
- Re: Bug Jeffrey Hutzelman (Jan 07)
- Anonymous Qmail Denial of Service Wietse Venema (Jan 03)
- Dosemu/S-Lang Overflow + sploit Trev (Jan 03)
- Re: Dosemu/S-Lang Overflow + sploit Erik Mouw (Jan 12)
- Re: Anonymous Qmail Denial of Service Trev (Jan 04)
- Vulnerability database workshop Gene Spafford (Jan 04)
- Re: Anonymous Qmail Denial of Service Nick Andrew (Jan 04)
- Improved icmp time/mask querying program David G. Andersen (Jan 04)
- Re: Bug Curt Sampson (Jan 03)
- Re: Anonymous Qmail Denial of Service Illuminatus Primus (Jan 04)
- Re: Anonymous Qmail Denial of Service Nick Maclaren (Jan 04)
- Sendmail 8.9.2 released Patrick Oonk (Jan 04)
- SUN almost has a clue! (automountd) (fwd) Robert Borrell (Jan 04)
- Re: SUN almost has a clue! (automountd) (fwd) Bojan Zdrnja (Jan 05)
- Bug Mr Spooty (Dec 31)